playback: revert the restored session prepare

Preparing the restored window on launch was meant to make the paused
session reachable from Bluetooth and Automate. The follow-up on the issue
shows the notification appears, but the car's play command still does not
reach the app until the phone is unlocked, and the speculative prepare
buffered up to 50 seconds of the restored track on every launch while
claiming the media controls whenever the app opened.

Removing the prepare also removes the error gate it needed, which could
hide genuine playback errors while paused.

Reverts #230.

.github/actions/build/action.yml

@@ -40,6 +40,11 @@ runs:
         path: ~/.gradle/caches
         key: gradle-v2-${{ hashFiles('**/*.gradle*', '**/gradle.properties', 'gradle/libs.versions.toml', 'gradle/wrapper/gradle-wrapper.properties') }}
         restore-keys: gradle-v2-
+    - uses: actions/cache@v6
+      with:
+        path: ~/.m2/repository/org/robolectric
+        key: robolectric-m2-v1-${{ hashFiles('gradle/libs.versions.toml', 'app/src/test/resources/robolectric.properties') }}
+        restore-keys: robolectric-m2-v1-
     - id: signing
       if: inputs.sign == 'true'
       shell: bash

.github/workflows/ci.yml

@@ -50,5 +50,5 @@ jobs:
       - uses: actions/cache@v6
         with:
           path: .integration/music
-          key: integration-music-v1
+          key: integration-music-v3
       - run: nix develop .#integration --command nu tools/integration-test.nu

.github/workflows/release.yml

@@ -85,7 +85,9 @@ jobs:
             echo "value=false" >> "$GITHUB_OUTPUT"
           fi
       - name: Check release notes exist
-        run: test -f "metadata/en-US/changelogs/${{ needs.build.outputs.version-code }}.txt"
+        run: |
+          test -f "metadata/en-US/changelogs/${{ needs.build.outputs.version-code }}.txt"
+          test -f "docs/releases/$GITHUB_REF_NAME.md"
       - name: Write Play service account
         if: steps.stable.outputs.value == 'true'
         env:
@@ -123,7 +125,7 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          args=(--verify-tag --title "$GITHUB_REF_NAME" --notes-file "metadata/en-US/changelogs/${{ needs.build.outputs.version-code }}.txt")
+          args=(--verify-tag --title "$GITHUB_REF_NAME" --notes-file "docs/releases/$GITHUB_REF_NAME.md")
           if [ "${{ steps.stable.outputs.value }}" != "true" ]; then
             args+=(--prerelease)
           fi

README.md

@@ -37,6 +37,7 @@ See [signing/README.md](signing/README.md) for the fingerprints and the commands
 - **Adaptive Theming:** Colours drawn from the current song's artwork.
 - **Search:** Fast search across the whole library, with per-list sort and filter controls.
 - **Playback:** Gapless playback, an editable queue you can reorder and jump through, plus loop and shuffle modes.
+- **ReplayGain:** Loudness normalization from the tags your server reports, with Auto, track and album modes and a preamp.
 - **Up Next:** Add items into the currently playing queue without rewriting it.
 - **Multiple Servers:** Connect several servers and switch between them quickly.
 - **Stream Quality:** Bitrate and format settings for Wi-Fi and mobile, with automatic switching.

app/build.gradle.kts

@@ -36,8 +36,8 @@ android {
         applicationId = "com.subtracks"
         minSdk = 24
         targetSdk = 37
-        versionCode = 13
-        versionName = "3.0.0"
+        versionCode = 14
+        versionName = "3.1.0"
         buildConfigField("String", "COMMIT_HASH", "\"$commitHash\"")
     }
 
@@ -119,7 +119,7 @@ android {
     }
 
     sourceSets {
-        getByName("debug").res.srcDir("src/nightly/res")
+        getByName("debug").res.directories.add("src/nightly/res")
     }
 
     buildTypes {
@@ -181,6 +181,8 @@ val demoScreenshotClass = "com.subtracks.ui.DemoScreenshotTest"
 val queryTimingClass = "com.subtracks.data.db.QueryTimingMeasurementTest"
 
 tasks.withType<Test>().configureEach {
+    // Robolectric fetches its Android SDK jar itself, outside Gradle's repositories.
+    systemProperty("robolectric.dependency.repo.url", providers.gradleProperty("mavenCentralMirrorUrl").get())
     if (name.endsWith("UnitTest")) {
         filter {
             (integrationTestClasses + demoScreenshotClass + queryTimingClass).forEach { excludeTestsMatching(it) }

app/src/integrationTest/kotlin/com/subtracks/data/source/subsonic/SubsonicSourceIntegrationTest.kt

@@ -56,7 +56,7 @@ class SubsonicSourceIntegrationTest(
             assertNotNull(kosmo.starred)
             assertTrue(kosmo.created <= System.currentTimeMillis() / 1000)
 
-            assertNull(albums.first { it.name == "Retroconnaissance EP" }.starred)
+            assertNull(albums.first { it.name == "Retroconnaissance" }.starred)
             assertNull(albums.first { it.name == "I Don't Know What I'm Doing" }.starred)
         }
 
@@ -92,7 +92,7 @@ class SubsonicSourceIntegrationTest(
                     .filter { it.artistId == artists.first { a -> a.name == "Ugress" }.id }
                     .map { it.name }
                     .sorted()
-            assertEquals(listOf("Kosmonaut", "Retroconnaissance EP"), ugressAlbums)
+            assertEquals(listOf("Kosmonaut", "Retroconnaissance"), ugressAlbums)
 
             val bradAlbums =
                 albums

app/src/integrationTest/kotlin/com/subtracks/data/source/subsonic/SubsonicWriteIntegrationTest.kt

@@ -22,7 +22,7 @@ class SubsonicWriteIntegrationTest(
                     .albums()
                     .toList()
                     .flatten()
-                    .first { it.name == "Retroconnaissance EP" }
+                    .first { it.name == "Retroconnaissance" }
 
             source.setStar(StarType.Album, album.id, true)
             try {
@@ -94,7 +94,7 @@ class SubsonicWriteIntegrationTest(
                     .songs()
                     .toList()
                     .flatten()
-                    .first { it.album == "Retroconnaissance EP" }
+                    .first { it.album == "Retroconnaissance" }
 
             source.setStar(StarType.Song, song.id, true)
             try {

app/src/integrationTest/kotlin/com/subtracks/data/sync/MultiSourceSyncIntegrationTest.kt

@@ -1,11 +1,7 @@
 package com.subtracks.data.sync
 
-import android.content.Context
-import androidx.room3.Room
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
-import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import com.subtracks.data.db.SubtracksDatabase
+import com.subtracks.data.db.createTestDatabase
 import com.subtracks.data.model.Source
 import com.subtracks.data.source.subsonic.TestServers
 import kotlinx.coroutines.runBlocking
@@ -18,12 +14,7 @@ class MultiSourceSyncIntegrationTest {
     @Test
     fun syncsEveryServerIntoOneLibraryWithoutInterference() =
         runBlocking {
-            val context = ApplicationProvider.getApplicationContext<Context>()
-            val db =
-                Room
-                    .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                    .setDriver(BundledSQLiteDriver())
-                    .build()
+            val db = createTestDatabase()
             try {
                 TestServers.all.forEachIndexed { index, server ->
                     val id = index + 1L

app/src/integrationTest/kotlin/com/subtracks/data/sync/PruneSyncIntegrationTest.kt

@@ -1,11 +1,7 @@
 package com.subtracks.data.sync
 
-import android.content.Context
-import androidx.room3.Room
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
-import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import com.subtracks.data.db.SubtracksDatabase
+import com.subtracks.data.db.createTestDatabase
 import com.subtracks.data.model.Source
 import com.subtracks.data.source.subsonic.SubsonicClient
 import com.subtracks.data.source.subsonic.SubsonicSource
@@ -28,12 +24,7 @@ class PruneSyncIntegrationTest {
             val removed = File(musicDir, REMOVED_ALBUM_DIR)
             check(removed.isDirectory) { "$removed is missing; the harness must prepare the prune library" }
 
-            val context = ApplicationProvider.getApplicationContext<Context>()
-            val db =
-                Room
-                    .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                    .setDriver(BundledSQLiteDriver())
-                    .build()
+            val db = createTestDatabase()
             try {
                 db.sourcesDao().upsertSource(
                     Source(id = 1, name = "prune", address = baseUrl, isActive = true, createdAt = 0),
@@ -93,7 +84,7 @@ class PruneSyncIntegrationTest {
             ?: error("$name is not set; run the integration harness (tools/integration-test.nu)")
 
     private companion object {
-        const val REMOVED_ALBUM_DIR = "197"
-        const val REMOVED_ALBUM_NAME = "Retroconnaissance EP"
+        const val REMOVED_ALBUM_DIR = "7GZYpfn8wypaTR00LWeNI4"
+        const val REMOVED_ALBUM_NAME = "Retroconnaissance"
     }
 }

app/src/integrationTest/kotlin/com/subtracks/data/sync/SyncServiceIntegrationTest.kt

@@ -1,11 +1,7 @@
 package com.subtracks.data.sync
 
-import android.content.Context
-import androidx.room3.Room
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
-import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import com.subtracks.data.db.SubtracksDatabase
+import com.subtracks.data.db.createTestDatabase
 import com.subtracks.data.model.Source
 import com.subtracks.data.source.subsonic.TestServers
 import kotlinx.coroutines.runBlocking
@@ -19,12 +15,7 @@ class SyncServiceIntegrationTest {
     fun syncMirrorsTheLibraryIntoRoomForEveryServer() =
         runBlocking {
             servers.forEach { server ->
-                val context = ApplicationProvider.getApplicationContext<Context>()
-                val db =
-                    Room
-                        .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                        .setDriver(BundledSQLiteDriver())
-                        .build()
+                val db = createTestDatabase()
                 try {
                     db.sourcesDao().upsertSource(
                         Source(id = 1, name = server.name, address = server.baseUrl, isActive = true, createdAt = 0),

app/src/main/kotlin/com/subtracks/data/db/AlbumCredits.kt

@@ -0,0 +1,127 @@
+package com.subtracks.data.db
+
+import androidx.room3.RoomRawQuery
+
+internal val CREDITED_ALBUM_ROWS = albumCreditRows(AlbumCreditQuery())
+internal val DOWNLOADED_ALBUM_ROWS = albumCreditRows(AlbumCreditQuery(downloaded = true))
+internal val DOWNLOADED_ALBUM_DETAILS_FOR_ARTIST =
+    albumCreditRows(AlbumCreditQuery(downloaded = true, artistScoped = true, selectAlbums = true))
+internal val DOWNLOADED_COVER_ALBUM_ROWS = albumCreditRows(AlbumCreditQuery(downloaded = true, coverOnly = true))
+internal val ARTIST_COVER_CREDITS = albumCreditRows(AlbumCreditQuery(coverOnly = true))
+internal val ARTIST_COVER_CREDITS_FOR_ARTIST = albumCreditRows(AlbumCreditQuery(coverOnly = true, artistScoped = true))
+
+private data class AlbumCreditQuery(
+    val artistScoped: Boolean = false,
+    val coverOnly: Boolean = false,
+    val downloaded: Boolean = false,
+    val selectAlbums: Boolean = false,
+)
+
+private fun albumCreditRows(query: AlbumCreditQuery): String =
+    if (query.selectAlbums) {
+        listOf(
+            primaryAlbumCredits(query),
+            albumRelationCredits(query),
+            trackRelationCredits(query),
+            trackCredits(query),
+        )
+    } else {
+        listOf(
+            primaryAlbumCredits(query),
+            albumRelationCredits(query),
+            trackCredits(query),
+            trackRelationCredits(query),
+        )
+    }.joinToString(if (query.downloaded) " UNION " else " UNION ALL ")
+
+private fun primaryAlbumCredits(query: AlbumCreditQuery): String =
+    buildString {
+        append(
+            when {
+                query.selectAlbums -> "SELECT albums.* FROM albums "
+                query.downloaded -> "SELECT albums.id AS albumId, albums.artistId AS artistId FROM albums "
+                else -> "SELECT albums.artistId AS artistId, albums.id AS albumId, 'album' AS creditType FROM albums "
+            },
+        )
+        append("WHERE albums.sourceId = :sourceId AND ${query.directArtist("albums.artistId")} ")
+        append(query.coverFilter())
+        if (query.downloaded) append("AND $ALBUM_DOWNLOADED ")
+    }.trim()
+
+private fun albumRelationCredits(query: AlbumCreditQuery): String =
+    buildString {
+        append(
+            when {
+                query.selectAlbums -> "SELECT albums.* FROM album_artists "
+                query.downloaded -> "SELECT albums.id, album_artists.artistId FROM album_artists "
+                else -> "SELECT album_artists.artistId, albums.id, 'album' FROM album_artists "
+            },
+        )
+        append("JOIN albums ON albums.sourceId = album_artists.sourceId AND albums.id = album_artists.albumId ")
+        append("WHERE album_artists.sourceId = :sourceId ")
+        if (query.artistScoped) append("AND album_artists.artistId = :artistId ")
+        append(query.coverFilter())
+        if (query.downloaded) append("AND $ALBUM_DOWNLOADED ")
+    }.trim()
+
+private fun trackCredits(query: AlbumCreditQuery): String =
+    buildString {
+        append(
+            when {
+                query.selectAlbums -> "SELECT albums.* FROM songs "
+                query.downloaded -> "SELECT songs.albumId, songs.artistId FROM songs "
+                else -> "SELECT songs.artistId, songs.albumId, 'track' FROM songs "
+            },
+        )
+        append(SONG_ALBUM_JOIN)
+        if (query.downloaded) append(TRACK_DOWNLOAD_JOIN)
+        append("WHERE songs.sourceId = :sourceId AND ${query.directArtist("songs.artistId")} ")
+        append(query.coverFilter())
+        if (query.downloaded) append("AND sd.status = 'Completed' ")
+    }.trim()
+
+private fun trackRelationCredits(query: AlbumCreditQuery): String =
+    buildString {
+        append(
+            when {
+                query.selectAlbums -> "SELECT albums.* FROM song_artists "
+                query.downloaded -> "SELECT songs.albumId, song_artists.artistId FROM song_artists "
+                else -> "SELECT song_artists.artistId, songs.albumId, 'track' FROM song_artists "
+            },
+        )
+        append("JOIN songs ON songs.sourceId = song_artists.sourceId AND songs.id = song_artists.songId ")
+        append(SONG_ALBUM_JOIN)
+        if (query.downloaded) append(TRACK_DOWNLOAD_JOIN)
+        append("WHERE song_artists.sourceId = :sourceId ")
+        if (query.artistScoped) append("AND song_artists.artistId = :artistId ")
+        append(query.coverFilter())
+        if (query.downloaded) append("AND sd.status = 'Completed' ")
+    }.trim()
+
+private fun AlbumCreditQuery.directArtist(column: String): String = if (artistScoped) "$column = :artistId" else "$column IS NOT NULL"
+
+private fun AlbumCreditQuery.coverFilter(): String = if (coverOnly) "AND albums.coverArt IS NOT NULL " else ""
+
+private const val SONG_ALBUM_JOIN = "JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId "
+
+private const val TRACK_DOWNLOAD_JOIN = "JOIN song_downloads sd ON sd.sourceId = songs.sourceId AND sd.songId = songs.id "
+
+private const val ALBUM_DOWNLOADED =
+    "EXISTS (SELECT 1 FROM songs " +
+        "JOIN song_downloads sd ON sd.sourceId = songs.sourceId AND sd.songId = songs.id " +
+        "WHERE songs.sourceId = albums.sourceId AND songs.albumId = albums.id AND sd.status = 'Completed')"
+
+internal fun downloadedArtistArtQuery(
+    sourceId: Long,
+    artistIds: List<String>,
+): RoomRawQuery {
+    val bindings = mutableMapOf<String, Any?>("sourceId" to sourceId)
+    val placeholders =
+        artistIds
+            .mapIndexed { index, artistId ->
+                val name = "artistId$index"
+                bindings[name] = artistId
+                ":$name"
+            }.ifEmpty { listOf("NULL") }
+    return rawQuery(DOWNLOADED_ARTIST_ART_UPDATE_SQL.replace(":artistIds", placeholders.joinToString(",")), bindings)
+}

app/src/main/kotlin/com/subtracks/data/db/Databases.kt

@@ -2,6 +2,7 @@ package com.subtracks.data.db
 
 import android.content.Context
 import androidx.room3.Room
+import androidx.room3.RoomDatabase
 import androidx.sqlite.driver.bundled.BundledSQLiteDriver
 import com.subtracks.log.Log
 
@@ -11,6 +12,9 @@ fun createAndroidDatabase(context: Context): SubtracksDatabase {
         .databaseBuilder<SubtracksDatabase>(context, "subtracks.db")
         .setDriver(driver)
         .addMigrations(*MIGRATIONS.map(::LoggedMigration).toTypedArray())
-        .addCallback(SqliteLifecycleLogging)
+        .addSubtracksDatabaseCallbacks()
         .build()
 }
+
+internal fun RoomDatabase.Builder<SubtracksDatabase>.addSubtracksDatabaseCallbacks(): RoomDatabase.Builder<SubtracksDatabase> =
+    addCallback(ArtistSearchTriggerOptimization).addCallback(SqliteLifecycleLogging)

app/src/main/kotlin/com/subtracks/data/db/DbLogging.kt

@@ -114,6 +114,16 @@ class LoggedMigration(
     }
 }
 
+internal object ArtistSearchTriggerOptimization : RoomDatabase.Callback() {
+    override suspend fun onCreate(connection: SQLiteConnection) {
+        optimizeArtistSearchTriggers(connection)
+    }
+
+    override suspend fun onOpen(connection: SQLiteConnection) {
+        if (!artistSearchTriggersOptimized(connection)) optimizeArtistSearchTriggers(connection)
+    }
+}
+
 internal object SqliteLifecycleLogging : RoomDatabase.Callback() {
     override suspend fun onCreate(connection: SQLiteConnection) {
         Log.i("sql", "created fresh database")

app/src/main/kotlin/com/subtracks/data/db/DownloadDao.kt

@@ -13,18 +13,43 @@ import kotlinx.coroutines.flow.Flow
 
 // A song is attributed to its album artist and to its credited track artist, so a guest artist's
 // downloads are visible even though they lead no albums of their own.
-private const val ARTIST_DOWNLOAD_ROWS =
-    "SELECT albums.artistId AS id, songs.id AS songId, song_downloads.status AS status " +
-        "FROM songs " +
+// Starts from songs so status totals include every song the artist is credited on.
+internal const val ARTIST_DOWNLOAD_ROWS =
+    "SELECT credits.artistId AS id, credits.songId AS songId, song_downloads.status AS status " +
+        "FROM (" + CREDITED_SONG_ROWS + ") credits " +
+        "LEFT JOIN song_downloads ON song_downloads.sourceId = :sourceId " +
+        "AND song_downloads.songId = credits.songId"
+
+// Starts from downloads so lists and filters over partially downloaded libraries do not scan songs.
+// Kept hand-written for that plan.
+internal const val DOWNLOADED_ARTIST_ROWS =
+    "SELECT albums.artistId AS id, song_downloads.songId AS songId, " +
+        "song_downloads.downloadedAt AS downloadedAt, song_downloads.status AS status " +
+        "FROM song_downloads " +
+        "JOIN songs ON songs.sourceId = song_downloads.sourceId AND songs.id = song_downloads.songId " +
         "JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
-        "LEFT JOIN song_downloads ON song_downloads.sourceId = songs.sourceId AND song_downloads.songId = songs.id " +
-        "WHERE songs.sourceId = :sourceId AND albums.artistId IS NOT NULL " +
+        "WHERE song_downloads.sourceId = :sourceId AND albums.artistId IS NOT NULL " +
         "UNION ALL " +
-        "SELECT songs.artistId AS id, songs.id AS songId, song_downloads.status AS status " +
-        "FROM songs " +
+        "SELECT album_artists.artistId AS id, song_downloads.songId AS songId, " +
+        "song_downloads.downloadedAt AS downloadedAt, song_downloads.status AS status " +
+        "FROM song_downloads " +
+        "JOIN songs ON songs.sourceId = song_downloads.sourceId AND songs.id = song_downloads.songId " +
         "JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
-        "LEFT JOIN song_downloads ON song_downloads.sourceId = songs.sourceId AND song_downloads.songId = songs.id " +
-        "WHERE songs.sourceId = :sourceId AND songs.artistId IS NOT NULL"
+        "JOIN album_artists ON album_artists.sourceId = albums.sourceId AND album_artists.albumId = albums.id " +
+        "WHERE song_downloads.sourceId = :sourceId " +
+        "UNION ALL " +
+        "SELECT songs.artistId AS id, song_downloads.songId AS songId, " +
+        "song_downloads.downloadedAt AS downloadedAt, song_downloads.status AS status " +
+        "FROM song_downloads " +
+        "JOIN songs ON songs.sourceId = song_downloads.sourceId AND songs.id = song_downloads.songId " +
+        "WHERE song_downloads.sourceId = :sourceId AND songs.artistId IS NOT NULL " +
+        "UNION ALL " +
+        "SELECT song_artists.artistId AS id, song_downloads.songId AS songId, " +
+        "song_downloads.downloadedAt AS downloadedAt, song_downloads.status AS status " +
+        "FROM song_downloads " +
+        "JOIN songs ON songs.sourceId = song_downloads.sourceId AND songs.id = song_downloads.songId " +
+        "JOIN song_artists ON song_artists.sourceId = songs.sourceId AND song_artists.songId = songs.id " +
+        "WHERE song_downloads.sourceId = :sourceId"
 
 @Dao
 interface DownloadDao {
@@ -38,10 +63,15 @@ interface DownloadDao {
     suspend fun all(): List<SongDownload>
 
     @Query(
-        "SELECT COUNT(DISTINCT songId) AS total, " +
+        "SELECT COALESCE((SELECT songCount FROM artists " +
+            "WHERE sourceId = :sourceId AND id = :artistId), 0) AS total, " +
+            "COALESCE(statuses.downloaded, 0) AS downloaded, " +
+            "COALESCE(statuses.downloading, 0) AS downloading " +
+            "FROM (SELECT " +
             "COUNT(DISTINCT CASE WHEN status = 'Completed' THEN songId END) AS downloaded, " +
             "COUNT(DISTINCT CASE WHEN status IN ('Queued', 'Running') THEN songId END) AS downloading " +
-            "FROM (" + ARTIST_DOWNLOAD_ROWS + ") WHERE id = :artistId",
+            "FROM (" + DOWNLOADED_ARTIST_ROWS + ") " +
+            "WHERE id = :artistId AND status IN ('Completed', 'Queued', 'Running')) statuses",
     )
     fun artistStatus(
         sourceId: Long,
@@ -89,12 +119,15 @@ interface DownloadDao {
     fun albumStatuses(sourceId: Long): Flow<List<EntityDownloadStatus>>
 
     @Query(
-        "SELECT id, " +
-            "COUNT(DISTINCT songId) AS total, " +
+        "SELECT statuses.id, artists.songCount AS total, statuses.downloaded, statuses.downloading " +
+            "FROM (SELECT id, " +
             "COUNT(DISTINCT CASE WHEN status = 'Completed' THEN songId END) AS downloaded, " +
             "COUNT(DISTINCT CASE WHEN status IN ('Queued', 'Running') THEN songId END) AS downloading " +
-            "FROM (" + ARTIST_DOWNLOAD_ROWS + ") GROUP BY id " +
-            "HAVING downloaded > 0 OR downloading > 0",
+            "FROM (" + DOWNLOADED_ARTIST_ROWS + ") " +
+            "WHERE status IN ('Completed', 'Queued', 'Running') " +
+            "GROUP BY id) statuses " +
+            "JOIN artists ON artists.sourceId = :sourceId AND artists.id = statuses.id " +
+            "WHERE statuses.downloaded > 0 OR statuses.downloading > 0",
     )
     fun artistStatuses(sourceId: Long): Flow<List<EntityDownloadStatus>>
 
@@ -114,24 +147,30 @@ interface DownloadDao {
 
     @Query(
         "SELECT d.sourceId AS sourceId, d.songId AS songId, s.title AS title, s.albumId AS albumId, al.name AS albumName, " +
-            "al.artistId AS artistId, ar.name AS artistName, d.status AS status, " +
-            "d.bytes AS bytes, d.total AS total " +
+            "al.artistId AS artistId, COALESCE(ar.name, al.albumArtist) AS artistName, d.status AS status, " +
+            "d.bytes AS bytes, d.total AS total, " +
+            "COALESCE(NULLIF(ar.sortName, ''), NULLIF(al.albumArtistSort, ''), ar.name, al.albumArtist, '') AS artistSort, " +
+            "COALESCE(NULLIF(al.sortName, ''), al.name, '') AS albumSort, " +
+            "COALESCE(NULLIF(s.sortName, ''), s.title, '') AS songSort " +
             "FROM song_downloads d " +
             "JOIN songs s ON s.sourceId = d.sourceId AND s.id = d.songId " +
             "LEFT JOIN albums al ON al.sourceId = s.sourceId AND al.id = s.albumId " +
             "LEFT JOIN artists ar ON ar.sourceId = al.sourceId AND ar.id = al.artistId " +
-            "WHERE d.sourceId = :sourceId",
+            "WHERE d.sourceId = :sourceId ORDER BY s.disc, s.track, s.id",
     )
     fun downloadedSongs(sourceId: Long): Flow<List<DownloadedSong>>
 
     @Query(
         "SELECT d.sourceId AS sourceId, s.albumId AS albumId, s.artistId AS artistId, " +
+            "al.artistId AS albumArtistId, " +
             "al.id AS albumRow, al.coverArt AS albumCoverArt, " +
-            "ar.id AS artistRow, ar.coverArt AS artistCoverArt " +
+            "ar.id AS artistRow, ar.coverArt AS artistCoverArt, " +
+            "aar.coverArt AS albumArtistCoverArt " +
             "FROM song_downloads d " +
             "LEFT JOIN songs s ON s.sourceId = d.sourceId AND s.id = d.songId " +
             "LEFT JOIN albums al ON al.sourceId = s.sourceId AND al.id = s.albumId " +
-            "LEFT JOIN artists ar ON ar.sourceId = s.sourceId AND ar.id = s.artistId",
+            "LEFT JOIN artists ar ON ar.sourceId = s.sourceId AND ar.id = s.artistId " +
+            "LEFT JOIN artists aar ON aar.sourceId = al.sourceId AND aar.id = al.artistId",
     )
     suspend fun artwork(): List<DownloadArtwork>
 

app/src/main/kotlin/com/subtracks/data/db/LibraryPaging.kt

@@ -5,45 +5,163 @@ import androidx.sqlite.SQLiteStatement
 import com.subtracks.data.prefs.AlbumSort
 import com.subtracks.data.prefs.ArtistSort
 import com.subtracks.data.prefs.PlaylistSort
+import com.subtracks.data.prefs.SortNameMode
 
-// These filters mirror the download-aware ones in LibraryDao but never mention song_downloads, so
-// the resulting PagingSource is not invalidated by download writes (including progress updates).
-internal const val ALBUMS_FILTER_BASE =
-    "FROM albums WHERE sourceId = ? " +
-        "AND (? = 0 OR (? = 1 AND starred IS NOT NULL) OR (? = 2 AND starred IS NULL)) " +
-        "AND (? = '' " +
-        "OR (length(?) >= 3 AND rowid IN (SELECT rowid FROM album_search " +
-        "WHERE album_search MATCH '\"' || replace(?, '\"', '\"\"') || '\"')) " +
-        "OR (length(?) < 3 AND (instr(lower(name), lower(?)) > 0 " +
-        "OR instr(lower(albumArtist), lower(?)) > 0))) "
+// The default filters intentionally omit song_downloads: the unfiltered lists do not need the
+// join, and their paging sources do not observe download writes (including progress updates).
+internal const val ALBUMS_FILTER = """
+FROM albums WHERE sourceId = :sourceId
+AND (:starredFilter = 0 OR (:starredFilter = 1 AND starred IS NOT NULL) OR (:starredFilter = 2 AND starred IS NULL))
+AND (:search = ''
+    OR (length(:search) >= $SEARCH_MIN_LENGTH AND rowid IN (SELECT rowid FROM album_search
+        WHERE album_search MATCH '"' || replace(:search, '"', '""') || '"'))
+    OR (length(:search) < $SEARCH_MIN_LENGTH AND (instr(lower(name), lower(:search)) > 0
+        OR instr(lower(albumArtist), lower(:search)) > 0
+        OR instr(lower(sortName), lower(:search)) > 0
+        OR instr(lower(albumArtistSort), lower(:search)) > 0)))
+"""
 
-internal const val ARTISTS_FILTER_BASE =
-    "FROM artists WHERE sourceId = ? " +
-        "AND (? = 0 OR (? = 1 AND starred IS NOT NULL) OR (? = 2 AND starred IS NULL)) " +
-        "AND (? = '' " +
-        "OR (length(?) >= 3 AND rowid IN (SELECT rowid FROM artist_search " +
-        "WHERE artist_search MATCH '\"' || replace(?, '\"', '\"\"') || '\"')) " +
-        "OR (length(?) < 3 AND instr(lower(name), lower(?)) > 0)) "
+internal const val ALBUMS_FILTER_DOWNLOADED = """
+FROM albums WHERE sourceId = :sourceId
+AND (:starredFilter = 0 OR (:starredFilter = 1 AND starred IS NOT NULL) OR (:starredFilter = 2 AND starred IS NULL))
+AND EXISTS (SELECT 1 FROM songs
+    JOIN song_downloads sd ON sd.sourceId = songs.sourceId AND sd.songId = songs.id
+    WHERE songs.sourceId = albums.sourceId AND songs.albumId = albums.id AND sd.status = 'Completed')
+AND (:search = ''
+    OR (length(:search) >= $SEARCH_MIN_LENGTH AND rowid IN (SELECT rowid FROM album_search
+        WHERE album_search MATCH '"' || replace(:search, '"', '""') || '"'))
+    OR (length(:search) < $SEARCH_MIN_LENGTH AND (instr(lower(name), lower(:search)) > 0
+        OR instr(lower(albumArtist), lower(:search)) > 0
+        OR instr(lower(sortName), lower(:search)) > 0
+        OR instr(lower(albumArtistSort), lower(:search)) > 0)))
+"""
 
-internal const val PLAYLISTS_FILTER_BASE =
-    "FROM playlists WHERE sourceId = ? " +
-        "AND (? = '' " +
-        "OR (length(?) >= 3 AND rowid IN (SELECT rowid FROM playlist_search " +
-        "WHERE playlist_search MATCH '\"' || replace(?, '\"', '\"\"') || '\"')) " +
-        "OR (length(?) < 3 AND instr(lower(name), lower(?)) > 0)) "
+internal const val ARTISTS_FILTER = """
+FROM artists WHERE sourceId = :sourceId
+AND (:starredFilter = 0 OR (:starredFilter = 1 AND starred IS NOT NULL) OR (:starredFilter = 2 AND starred IS NULL))
+AND $ARTIST_CREDITED
+AND (:search = ''
+    OR (length(:search) >= $SEARCH_MIN_LENGTH AND rowid IN (SELECT rowid FROM artist_search
+        WHERE artist_search MATCH '"' || replace(:search, '"', '""') || '"'))
+    OR (length(:search) < $SEARCH_MIN_LENGTH AND (instr(lower(name), lower(:search)) > 0
+        OR instr(lower(sortName), lower(:search)) > 0)))
+"""
 
-internal fun albumsDefaultQuery(
+internal const val ARTISTS_FILTER_DOWNLOADED = """
+FROM artists WHERE sourceId = :sourceId
+AND (:starredFilter = 0 OR (:starredFilter = 1 AND starred IS NOT NULL) OR (:starredFilter = 2 AND starred IS NULL))
+AND $ARTIST_CREDITED
+AND EXISTS (SELECT 1 FROM ($ARTIST_DOWNLOAD_ROWS) dl
+    WHERE dl.id = artists.id AND dl.status = 'Completed')
+AND (:search = ''
+    OR (length(:search) >= $SEARCH_MIN_LENGTH AND rowid IN (SELECT rowid FROM artist_search
+        WHERE artist_search MATCH '"' || replace(:search, '"', '""') || '"'))
+    OR (length(:search) < $SEARCH_MIN_LENGTH AND (instr(lower(name), lower(:search)) > 0
+        OR instr(lower(sortName), lower(:search)) > 0)))
+"""
+
+// The downloaded list counts the albums that actually have a download so the number under an artist
+// matches the albums its detail screen lists.
+internal val ARTIST_COLUMNS_DOWNLOADED = """
+artists.sourceId, artists.id, artists.name,
+(SELECT COUNT(*) FROM ($DOWNLOADED_ARTIST_ALBUMS)) AS albumCount,
+$ARTIST_COLUMNS_TAIL
+"""
+
+internal const val PLAYLISTS_FILTER = """
+FROM playlists WHERE sourceId = :sourceId
+AND (:search = ''
+    OR (length(:search) >= $SEARCH_MIN_LENGTH AND rowid IN (SELECT rowid FROM playlist_search
+        WHERE playlist_search MATCH '"' || replace(:search, '"', '""') || '"'))
+    OR (length(:search) < $SEARCH_MIN_LENGTH AND instr(lower(name), lower(:search)) > 0))
+"""
+
+internal const val PLAYLISTS_FILTER_DOWNLOADED = """
+FROM playlists WHERE sourceId = :sourceId
+AND EXISTS (SELECT 1 FROM playlist_songs ps
+    JOIN song_downloads sd ON sd.sourceId = ps.sourceId AND sd.songId = ps.songId
+    WHERE ps.sourceId = playlists.sourceId AND ps.playlistId = playlists.id AND sd.status = 'Completed')
+AND (:search = ''
+    OR (length(:search) >= $SEARCH_MIN_LENGTH AND rowid IN (SELECT rowid FROM playlist_search
+        WHERE playlist_search MATCH '"' || replace(:search, '"', '""') || '"'))
+    OR (length(:search) < $SEARCH_MIN_LENGTH AND instr(lower(name), lower(:search)) > 0))
+"""
+
+// The downloaded list counts the songs that actually have a download so the number under a
+// playlist matches the songs its detail screen lists.
+internal const val PLAYLISTS_COLUMNS_DOWNLOADED = """
+playlists.sourceId, playlists.id, playlists.name, playlists.comment, playlists.coverArt,
+(SELECT COUNT(DISTINCT ps.songId)
+    FROM playlist_songs ps
+    JOIN song_downloads sd ON sd.sourceId = ps.sourceId AND sd.songId = ps.songId AND sd.status = 'Completed'
+    WHERE ps.sourceId = playlists.sourceId AND ps.playlistId = playlists.id
+) AS songCount,
+playlists.created, playlists.changed, playlists.duration, playlists.owner, playlists.shared
+"""
+
+internal fun albumsPageQuery(
     sourceId: Long,
     starredFilter: Int,
     search: String,
     sort: AlbumSort,
     descending: Boolean,
-): RoomRawQuery {
-    val order = albumOrder(sort, descending)
-    return RoomRawQuery("SELECT * $ALBUMS_FILTER_BASE ORDER BY $order") { stmt ->
-        stmt.bindAlbumFilters(sourceId, starredFilter, search)
-    }
-}
+    downloaded: Boolean,
+    sortNameMode: SortNameMode = SortNameMode.SortName,
+): RoomRawQuery =
+    rawQuery(
+        sql = "SELECT * ${if (downloaded) ALBUMS_FILTER_DOWNLOADED else ALBUMS_FILTER} ORDER BY ${albumOrder(
+            sort,
+            descending,
+            sortNameMode,
+        )}",
+        bindings =
+            mapOf(
+                "sourceId" to sourceId,
+                "starredFilter" to starredFilter,
+                "search" to search,
+            ),
+    )
+
+internal fun artistsPageQuery(
+    sourceId: Long,
+    starredFilter: Int,
+    search: String,
+    sort: ArtistSort,
+    descending: Boolean,
+    downloaded: Boolean,
+    sortNameMode: SortNameMode = SortNameMode.SortName,
+): RoomRawQuery =
+    rawQuery(
+        sql =
+            "SELECT ${if (downloaded) ARTIST_COLUMNS_DOWNLOADED else ARTIST_COLUMNS} " +
+                "${if (downloaded) ARTISTS_FILTER_DOWNLOADED else ARTISTS_FILTER} " +
+                "ORDER BY ${artistOrder(sort, descending, sortNameMode)}",
+        bindings =
+            mapOf(
+                "sourceId" to sourceId,
+                "starredFilter" to starredFilter,
+                "search" to search,
+            ),
+    )
+
+internal fun playlistsPageQuery(
+    sourceId: Long,
+    search: String,
+    sort: PlaylistSort,
+    descending: Boolean,
+    downloaded: Boolean,
+): RoomRawQuery =
+    rawQuery(
+        sql =
+            "SELECT ${if (downloaded) PLAYLISTS_COLUMNS_DOWNLOADED else "*"} " +
+                "${if (downloaded) PLAYLISTS_FILTER_DOWNLOADED else PLAYLISTS_FILTER} " +
+                "ORDER BY ${playlistOrder(sort, descending)}",
+        bindings =
+            mapOf(
+                "sourceId" to sourceId,
+                "search" to search,
+            ),
+    )
 
 internal fun rediscoverAlbumsQuery(
     sourceId: Long,
@@ -51,90 +169,126 @@ internal fun rediscoverAlbumsQuery(
     search: String,
     cutoff: Long,
 ): RoomRawQuery =
-    RoomRawQuery(
-        "SELECT * $ALBUMS_FILTER_BASE AND played IS NOT NULL AND played < ? " +
-            "ORDER BY played ASC, name COLLATE NOCASE, id",
-    ) { stmt ->
-        stmt.bindAlbumFilters(sourceId, starredFilter, search)
-        stmt.bindLong(11, cutoff)
-    }
+    rawQuery(
+        sql =
+            "SELECT * $ALBUMS_FILTER AND played IS NOT NULL AND played < :cutoff " +
+                "ORDER BY played ASC, sortName COLLATE NOCASE, id",
+        bindings =
+            mapOf(
+                "sourceId" to sourceId,
+                "starredFilter" to starredFilter,
+                "search" to search,
+                "cutoff" to cutoff,
+            ),
+    )
 
-private fun SQLiteStatement.bindAlbumFilters(
-    sourceId: Long,
-    starredFilter: Int,
-    search: String,
+// RoomRawQuery takes a positional bind function, but SQLite gives a repeated named parameter one
+// index, so the SQL can keep its names and only the first-appearance order needs binding.
+internal fun rawQuery(
+    sql: String,
+    bindings: Map<String, Any?>,
+): RoomRawQuery {
+    val values =
+        Regex(":(\\w+)")
+            .findAll(sql)
+            .map { it.groupValues[1] }
+            .distinct()
+            .map(bindings::getValue)
+            .toList()
+    return RoomRawQuery(sql) { statement ->
+        values.forEachIndexed { index, value -> statement.bind(index + 1, value) }
+    }
+}
+
+private fun SQLiteStatement.bind(
+    index: Int,
+    value: Any?,
 ) {
-    bindLong(1, sourceId)
-    bindInt(2, starredFilter)
-    bindInt(3, starredFilter)
-    bindInt(4, starredFilter)
-    bindText(5, search)
-    bindText(6, search)
-    bindText(7, search)
-    bindText(8, search)
-    bindText(9, search)
-    bindText(10, search)
-}
-
-internal fun artistsDefaultQuery(
-    sourceId: Long,
-    starredFilter: Int,
-    search: String,
-    sort: ArtistSort,
-    descending: Boolean,
-): RoomRawQuery {
-    val order = artistOrder(sort, descending)
-    return RoomRawQuery("SELECT * $ARTISTS_FILTER_BASE ORDER BY $order") { stmt ->
-        stmt.bindLong(1, sourceId)
-        stmt.bindInt(2, starredFilter)
-        stmt.bindInt(3, starredFilter)
-        stmt.bindInt(4, starredFilter)
-        stmt.bindText(5, search)
-        stmt.bindText(6, search)
-        stmt.bindText(7, search)
-        stmt.bindText(8, search)
-        stmt.bindText(9, search)
+    when (value) {
+        null -> bindNull(index)
+        is Int -> bindLong(index, value.toLong())
+        is Long -> bindLong(index, value)
+        is String -> bindText(index, value)
+        else -> error("Unsupported SQL parameter: ${value::class.qualifiedName}")
     }
 }
 
-internal fun playlistsDefaultQuery(
-    sourceId: Long,
-    search: String,
-    sort: PlaylistSort,
-    descending: Boolean,
-): RoomRawQuery {
-    val order = playlistOrder(sort, descending)
-    return RoomRawQuery("SELECT * $PLAYLISTS_FILTER_BASE ORDER BY $order") { stmt ->
-        stmt.bindLong(1, sourceId)
-        stmt.bindText(2, search)
-        stmt.bindText(3, search)
-        stmt.bindText(4, search)
-        stmt.bindText(5, search)
-        stmt.bindText(6, search)
+internal fun albumNameSortKey(mode: SortNameMode): String =
+    when (mode) {
+        SortNameMode.SortName -> "sortName COLLATE NOCASE"
+        SortNameMode.Name -> "name COLLATE NOCASE"
+        SortNameMode.NonLatin -> "(CASE WHEN name GLOB '*[A-Za-z]*' THEN name ELSE sortName END) COLLATE NOCASE"
+    }
+
+internal fun albumArtistSortKey(mode: SortNameMode): String =
+    when (mode) {
+        SortNameMode.SortName -> {
+            "albumArtistSort COLLATE NOCASE"
+        }
+
+        SortNameMode.Name -> {
+            "albumArtist COLLATE NOCASE"
+        }
+
+        SortNameMode.NonLatin -> {
+            "(CASE WHEN albumArtist GLOB '*[A-Za-z]*' THEN albumArtist ELSE albumArtistSort END) COLLATE NOCASE"
+        }
+    }
+
+internal fun artistNameSortKey(mode: SortNameMode): String =
+    when (mode) {
+        SortNameMode.SortName -> "sortName COLLATE NOCASE"
+        SortNameMode.Name -> "name COLLATE NOCASE"
+        SortNameMode.NonLatin -> "(CASE WHEN name GLOB '*[A-Za-z]*' THEN name ELSE sortName END) COLLATE NOCASE"
     }
-}
 
 private fun albumOrder(
     sort: AlbumSort,
     descending: Boolean,
+    mode: SortNameMode,
 ): String =
     when (sort) {
-        AlbumSort.Name -> if (descending) ALBUM_ORDER_BY_NAME_REVERSED else ALBUM_ORDER_BY_NAME
-        AlbumSort.Artist -> if (descending) ALBUM_ORDER_BY_ARTIST_REVERSED else ALBUM_ORDER_BY_ARTIST
-        AlbumSort.Year -> if (descending) ALBUM_ORDER_BY_YEAR_REVERSED else ALBUM_ORDER_BY_YEAR
-        AlbumSort.Added -> if (descending) ALBUM_ORDER_BY_ADDED_REVERSED else ALBUM_ORDER_BY_ADDED
-        AlbumSort.Starred -> if (descending) ALBUM_ORDER_BY_STARRED_REVERSED else ALBUM_ORDER_BY_STARRED
-        AlbumSort.Frequent -> if (descending) ALBUM_ORDER_BY_FREQUENT_REVERSED else ALBUM_ORDER_BY_FREQUENT
-        AlbumSort.Recent -> if (descending) ALBUM_ORDER_BY_RECENT_REVERSED else ALBUM_ORDER_BY_RECENT
+        AlbumSort.Name -> {
+            val name = albumNameSortKey(mode)
+            if (descending) "$name DESC, id DESC" else "$name, id"
+        }
+
+        AlbumSort.Artist -> {
+            val artist = albumArtistSortKey(mode)
+            val name = albumNameSortKey(mode)
+            if (descending) "$artist DESC, year DESC, $name DESC, id DESC" else "$artist, year, $name, id"
+        }
+
+        AlbumSort.Year -> {
+            if (descending) ALBUM_ORDER_BY_YEAR_REVERSED else ALBUM_ORDER_BY_YEAR
+        }
+
+        AlbumSort.Added -> {
+            if (descending) ALBUM_ORDER_BY_ADDED_REVERSED else ALBUM_ORDER_BY_ADDED
+        }
+
+        AlbumSort.Starred -> {
+            if (descending) ALBUM_ORDER_BY_STARRED_REVERSED else ALBUM_ORDER_BY_STARRED
+        }
+
+        AlbumSort.Frequent -> {
+            if (descending) ALBUM_ORDER_BY_FREQUENT_REVERSED else ALBUM_ORDER_BY_FREQUENT
+        }
+
+        AlbumSort.Recent -> {
+            if (descending) ALBUM_ORDER_BY_RECENT_REVERSED else ALBUM_ORDER_BY_RECENT
+        }
     }
 
 private fun artistOrder(
     sort: ArtistSort,
     descending: Boolean,
+    mode: SortNameMode,
 ): String =
     when (sort) {
         ArtistSort.Name -> {
-            if (descending) ARTIST_ORDER_BY_NAME_REVERSED else ARTIST_ORDER_BY_NAME
+            val name = artistNameSortKey(mode)
+            if (descending) "$name DESC, id DESC" else "$name, id"
         }
 
         ArtistSort.AlbumCount -> {

app/src/main/kotlin/com/subtracks/data/db/Migrations.kt

@@ -394,6 +394,275 @@ val MIGRATION_27_28 =
         }
     }
 
+val MIGRATION_28_29 =
+    object : Migration(28, 29) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL("ALTER TABLE `songs` ADD COLUMN `artists` TEXT NOT NULL DEFAULT ''")
+            connection.execSQL("ALTER TABLE `albums` ADD COLUMN `artists` TEXT NOT NULL DEFAULT ''")
+            connection.execSQL(
+                "CREATE TABLE IF NOT EXISTS `album_artists` (`sourceId` INTEGER NOT NULL, `albumId` TEXT NOT NULL, " +
+                    "`position` INTEGER NOT NULL, `artistId` TEXT NOT NULL, `name` TEXT NOT NULL, " +
+                    "PRIMARY KEY(`sourceId`, `albumId`, `position`), " +
+                    "FOREIGN KEY(`sourceId`, `albumId`) REFERENCES `albums`(`sourceId`, `id`) " +
+                    "ON UPDATE NO ACTION ON DELETE CASCADE )",
+            )
+            connection.execSQL(
+                "CREATE INDEX IF NOT EXISTS `index_album_artists_sourceId_artistId` ON `album_artists` (`sourceId`, `artistId`)",
+            )
+            connection.execSQL(
+                "CREATE TABLE IF NOT EXISTS `song_artists` (`sourceId` INTEGER NOT NULL, `songId` TEXT NOT NULL, " +
+                    "`position` INTEGER NOT NULL, `artistId` TEXT NOT NULL, `name` TEXT NOT NULL, " +
+                    "PRIMARY KEY(`sourceId`, `songId`, `position`), " +
+                    "FOREIGN KEY(`sourceId`, `songId`) REFERENCES `songs`(`sourceId`, `id`) " +
+                    "ON UPDATE NO ACTION ON DELETE CASCADE )",
+            )
+            connection.execSQL(
+                "CREATE INDEX IF NOT EXISTS `index_song_artists_sourceId_artistId` ON `song_artists` (`sourceId`, `artistId`)",
+            )
+        }
+    }
+
+val MIGRATION_29_30 =
+    object : Migration(29, 30) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL("ALTER TABLE `artists` ADD COLUMN `songCount` INTEGER NOT NULL DEFAULT 0")
+            connection.execSQL(
+                "WITH credited AS (" +
+                    "SELECT sourceId, artistId, songId FROM song_artists " +
+                    "UNION " +
+                    "SELECT sourceId, artistId, id AS songId FROM songs WHERE artistId IS NOT NULL " +
+                    "UNION " +
+                    "SELECT album_artists.sourceId, album_artists.artistId, songs.id " +
+                    "FROM album_artists JOIN songs " +
+                    "ON songs.sourceId = album_artists.sourceId AND songs.albumId = album_artists.albumId " +
+                    "UNION " +
+                    "SELECT albums.sourceId, albums.artistId, songs.id " +
+                    "FROM albums JOIN songs ON songs.sourceId = albums.sourceId AND songs.albumId = albums.id " +
+                    "WHERE albums.artistId IS NOT NULL" +
+                    "), counts AS (" +
+                    "SELECT sourceId, artistId AS id, COUNT(*) AS songCount FROM credited GROUP BY sourceId, artistId" +
+                    ") " +
+                    "UPDATE artists SET songCount = c.songCount " +
+                    "FROM (SELECT artists.sourceId AS sourceId, artists.id AS id, " +
+                    "COALESCE(counts.songCount, 0) AS songCount " +
+                    "FROM artists LEFT JOIN counts " +
+                    "ON counts.sourceId = artists.sourceId AND counts.id = artists.id) c " +
+                    "WHERE artists.sourceId = c.sourceId AND artists.id = c.id " +
+                    "AND artists.songCount != c.songCount",
+            )
+        }
+    }
+
+val MIGRATION_30_31 =
+    object : Migration(30, 31) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL("ALTER TABLE `artists` ADD COLUMN `sortName` TEXT NOT NULL DEFAULT '' COLLATE NOCASE")
+            connection.execSQL("ALTER TABLE `albums` ADD COLUMN `sortName` TEXT NOT NULL DEFAULT '' COLLATE NOCASE")
+            connection.execSQL("ALTER TABLE `albums` ADD COLUMN `albumArtistSort` TEXT NOT NULL DEFAULT '' COLLATE NOCASE")
+            connection.execSQL("ALTER TABLE `songs` ADD COLUMN `sortName` TEXT NOT NULL DEFAULT '' COLLATE NOCASE")
+            connection.execSQL("ALTER TABLE `songs` ADD COLUMN `artistSort` TEXT NOT NULL DEFAULT '' COLLATE NOCASE")
+            dropSearchIndex(connection, "artist_search")
+            dropSearchIndex(connection, "album_search")
+            dropSearchIndex(connection, "song_search")
+            connection.execSQL("UPDATE `artists` SET `sortName` = `name`")
+            connection.execSQL("UPDATE `albums` SET `sortName` = `name`")
+            connection.execSQL("UPDATE `songs` SET `sortName` = `title`")
+            connection.execSQL(
+                "UPDATE `albums` SET `albumArtistSort` = COALESCE(" +
+                    "(SELECT a.`sortName` FROM `artists` a " +
+                    "WHERE a.`sourceId` = `albums`.`sourceId` AND a.`id` = `albums`.`artistId`), " +
+                    "(SELECT a.`sortName` FROM `album_artists` aa JOIN `artists` a " +
+                    "ON a.`sourceId` = aa.`sourceId` AND a.`id` = aa.`artistId` " +
+                    "WHERE aa.`sourceId` = `albums`.`sourceId` AND aa.`albumId` = `albums`.`id` " +
+                    "ORDER BY aa.`position` LIMIT 1), " +
+                    "`albumArtist`, '')",
+            )
+            connection.execSQL(
+                "UPDATE `songs` SET `artistSort` = COALESCE(" +
+                    "(SELECT a.`sortName` FROM `artists` a " +
+                    "WHERE a.`sourceId` = `songs`.`sourceId` AND a.`id` = `songs`.`artistId`), " +
+                    "(SELECT a.`sortName` FROM `song_artists` sa JOIN `artists` a " +
+                    "ON a.`sourceId` = sa.`sourceId` AND a.`id` = sa.`artistId` " +
+                    "WHERE sa.`sourceId` = `songs`.`sourceId` AND sa.`songId` = `songs`.`id` " +
+                    "ORDER BY sa.`position` LIMIT 1), " +
+                    "`artist`, '')",
+            )
+            ARTIST_INDEXES.forEach { connection.execSQL("DROP INDEX IF EXISTS `$it`") }
+            ALBUM_INDEXES.forEach { connection.execSQL("DROP INDEX IF EXISTS `$it`") }
+            ARTIST_INDEX_SQL.forEach { connection.execSQL(it) }
+            ALBUM_INDEX_SQL.forEach { connection.execSQL(it) }
+            createSearchIndex(connection, "artist_search", "artists", listOf("name", "sortName"))
+            createSearchIndex(connection, "album_search", "albums", listOf("name", "albumArtist", "sortName", "albumArtistSort"))
+            createSearchIndex(connection, "song_search", "songs", listOf("title", "artist", "sortName", "artistSort"))
+        }
+    }
+
+private val ARTIST_INDEXES =
+    listOf("index_artists_name", "index_artists_albumCount", "index_artists_starred", "index_artists_frequent", "index_artists_recent")
+
+private val ALBUM_INDEXES =
+    listOf(
+        "index_albums_name",
+        "index_albums_artist",
+        "index_albums_year",
+        "index_albums_added",
+        "index_albums_starred",
+        "index_albums_frequent",
+        "index_albums_recent",
+    )
+
+private val ARTIST_INDEX_SQL =
+    listOf(
+        "CREATE INDEX IF NOT EXISTS `index_artists_name` ON `artists` (`sourceId`, `sortName`, `id`)",
+        "CREATE INDEX IF NOT EXISTS `index_artists_albumCount` ON `artists` " +
+            "(`sourceId` ASC, `albumCount` DESC, `sortName` ASC, `id` ASC)",
+        "CREATE INDEX IF NOT EXISTS `index_artists_starred` ON `artists` " +
+            "(`sourceId` ASC, `starred` DESC, `sortName` ASC, `id` ASC)",
+        "CREATE INDEX IF NOT EXISTS `index_artists_frequent` ON `artists` " +
+            "(`sourceId` ASC, `playCount` DESC, `sortName` ASC, `id` ASC)",
+        "CREATE INDEX IF NOT EXISTS `index_artists_recent` ON `artists` " +
+            "(`sourceId` ASC, `played` DESC, `sortName` ASC, `id` ASC)",
+    )
+
+private val ALBUM_INDEX_SQL =
+    listOf(
+        "CREATE INDEX IF NOT EXISTS `index_albums_name` ON `albums` (`sourceId`, `sortName`, `id`)",
+        "CREATE INDEX IF NOT EXISTS `index_albums_artist` ON `albums` " +
+            "(`sourceId`, `albumArtistSort`, `year`, `sortName`, `id`)",
+        "CREATE INDEX IF NOT EXISTS `index_albums_year` ON `albums` " +
+            "(`sourceId` ASC, `year` DESC, `sortName` ASC, `id` ASC)",
+        "CREATE INDEX IF NOT EXISTS `index_albums_added` ON `albums` " +
+            "(`sourceId` ASC, `created` DESC, `sortName` ASC, `id` ASC)",
+        "CREATE INDEX IF NOT EXISTS `index_albums_starred` ON `albums` " +
+            "(`sourceId` ASC, `starred` DESC, `sortName` ASC, `id` ASC)",
+        "CREATE INDEX IF NOT EXISTS `index_albums_frequent` ON `albums` " +
+            "(`sourceId` ASC, `playCount` DESC, `sortName` ASC, `id` ASC)",
+        "CREATE INDEX IF NOT EXISTS `index_albums_recent` ON `albums` " +
+            "(`sourceId` ASC, `played` DESC, `sortName` ASC, `id` ASC)",
+    )
+
+private suspend fun dropSearchIndex(
+    connection: SQLiteConnection,
+    table: String,
+) {
+    listOf("BEFORE_UPDATE", "BEFORE_DELETE", "AFTER_UPDATE", "AFTER_INSERT").forEach {
+        connection.execSQL("DROP TRIGGER IF EXISTS `room_fts_content_sync_${table}_$it`")
+    }
+    connection.execSQL("DROP TABLE IF EXISTS `$table`")
+}
+
+val MIGRATION_31_32 =
+    object : Migration(31, 32) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL("ALTER TABLE `artists` ADD COLUMN `credited` INTEGER NOT NULL DEFAULT 1")
+            connection.execSQL(
+                "UPDATE `artists` SET `credited` = 0 " +
+                    "WHERE EXISTS (SELECT 1 FROM `album_artists` WHERE `sourceId` = `artists`.`sourceId`) " +
+                    "AND EXISTS (SELECT 1 FROM `song_artists` WHERE `sourceId` = `artists`.`sourceId`) " +
+                    "AND NOT EXISTS (SELECT 1 FROM `album_artists` aa " +
+                    "WHERE aa.`sourceId` = `artists`.`sourceId` AND aa.`artistId` = `artists`.`id`) " +
+                    "AND NOT EXISTS (SELECT 1 FROM `song_artists` sa " +
+                    "WHERE sa.`sourceId` = `artists`.`sourceId` AND sa.`artistId` = `artists`.`id`)",
+            )
+        }
+    }
+
+val MIGRATION_32_33 =
+    object : Migration(32, 33) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL("ALTER TABLE `sources` ADD COLUMN `creditsStale` INTEGER NOT NULL DEFAULT 1")
+            connection.execSQL("DROP INDEX IF EXISTS `index_songs_starred`")
+            connection.execSQL(
+                "CREATE INDEX IF NOT EXISTS `index_songs_starred` ON `songs` " +
+                    "(`sourceId` ASC, `starred` DESC, `sortName` ASC, `id` ASC)",
+            )
+        }
+    }
+
+// Recomputes the artist totals from the same credit unions the sync uses, so badges, the artist
+// page and the shuffle queue agree for libraries that predate the change.
+val MIGRATION_33_34 =
+    object : Migration(33, 34) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL(
+                "WITH credited_songs AS (" +
+                    "SELECT songs.`sourceId` AS sourceId, songs.`artistId` AS artistId, " +
+                    "songs.`id` AS songId, songs.`playCount` AS playCount, songs.`played` AS played " +
+                    "FROM songs WHERE songs.`artistId` IS NOT NULL " +
+                    "UNION " +
+                    "SELECT song_artists.`sourceId`, song_artists.`artistId`, songs.`id`, " +
+                    "songs.`playCount`, songs.`played` " +
+                    "FROM song_artists JOIN songs " +
+                    "ON songs.`sourceId` = song_artists.`sourceId` AND songs.`id` = song_artists.`songId` " +
+                    "UNION " +
+                    "SELECT albums.`sourceId`, albums.`artistId`, songs.`id`, " +
+                    "songs.`playCount`, songs.`played` " +
+                    "FROM albums JOIN songs " +
+                    "ON songs.`sourceId` = albums.`sourceId` AND songs.`albumId` = albums.`id` " +
+                    "WHERE albums.`artistId` IS NOT NULL " +
+                    "UNION " +
+                    "SELECT album_artists.`sourceId`, album_artists.`artistId`, songs.`id`, " +
+                    "songs.`playCount`, songs.`played` " +
+                    "FROM album_artists JOIN songs " +
+                    "ON songs.`sourceId` = album_artists.`sourceId` AND songs.`albumId` = album_artists.`albumId`" +
+                    "), credited_albums AS (" +
+                    "SELECT albums.`sourceId` AS sourceId, albums.`artistId` AS artistId, " +
+                    "albums.`id` AS albumId " +
+                    "FROM albums WHERE albums.`artistId` IS NOT NULL " +
+                    "UNION " +
+                    "SELECT album_artists.`sourceId`, album_artists.`artistId`, albums.`id` " +
+                    "FROM album_artists JOIN albums " +
+                    "ON albums.`sourceId` = album_artists.`sourceId` AND albums.`id` = album_artists.`albumId` " +
+                    "UNION " +
+                    "SELECT songs.`sourceId`, songs.`artistId`, songs.`albumId` " +
+                    "FROM songs JOIN albums " +
+                    "ON albums.`sourceId` = songs.`sourceId` AND albums.`id` = songs.`albumId` " +
+                    "WHERE songs.`artistId` IS NOT NULL " +
+                    "UNION " +
+                    "SELECT song_artists.`sourceId`, song_artists.`artistId`, songs.`albumId` " +
+                    "FROM song_artists JOIN songs " +
+                    "ON songs.`sourceId` = song_artists.`sourceId` AND songs.`id` = song_artists.`songId` " +
+                    "JOIN albums ON albums.`sourceId` = songs.`sourceId` AND albums.`id` = songs.`albumId`" +
+                    "), totals AS (" +
+                    "SELECT sourceId, artistId AS id, COUNT(DISTINCT songId) AS songCount, " +
+                    "SUM(playCount) AS playCount, MAX(played) AS played " +
+                    "FROM credited_songs GROUP BY sourceId, artistId" +
+                    "), album_totals AS (" +
+                    "SELECT sourceId, artistId AS id, COUNT(DISTINCT albumId) AS albumCount " +
+                    "FROM credited_albums GROUP BY sourceId, artistId" +
+                    ") " +
+                    "UPDATE artists SET songCount = c.songCount, albumCount = c.albumCount, " +
+                    "playCount = c.playCount, played = c.played " +
+                    "FROM (SELECT artists.`sourceId` AS sourceId, artists.`id` AS id, " +
+                    "COALESCE(totals.songCount, 0) AS songCount, " +
+                    "COALESCE(album_totals.albumCount, 0) AS albumCount, " +
+                    "COALESCE(totals.playCount, 0) AS playCount, totals.played AS played " +
+                    "FROM artists LEFT JOIN totals " +
+                    "ON totals.sourceId = artists.`sourceId` AND totals.id = artists.`id` " +
+                    "LEFT JOIN album_totals " +
+                    "ON album_totals.sourceId = artists.`sourceId` AND album_totals.id = artists.`id` " +
+                    "WHERE EXISTS (SELECT 1 FROM album_artists WHERE album_artists.`sourceId` = artists.`sourceId`) " +
+                    "OR EXISTS (SELECT 1 FROM song_artists WHERE song_artists.`sourceId` = artists.`sourceId`)" +
+                    ") c " +
+                    "WHERE artists.`sourceId` = c.sourceId AND artists.`id` = c.id " +
+                    "AND (artists.`songCount` != c.songCount OR artists.`albumCount` != c.albumCount " +
+                    "OR artists.`playCount` != c.playCount OR artists.`played` IS NOT c.played)",
+            )
+        }
+    }
+
+val MIGRATION_34_35 =
+    object : Migration(34, 35) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL(
+                "CREATE TABLE IF NOT EXISTS `artist_bios` (" +
+                    "`sourceId` INTEGER NOT NULL, `artistId` TEXT NOT NULL, `biography` TEXT, " +
+                    "PRIMARY KEY(`sourceId`, `artistId`), " +
+                    "FOREIGN KEY(`sourceId`) REFERENCES `sources`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE)",
+            )
+        }
+    }
+
 // Mirrors the FTS5 table and content-sync triggers Room generates for the @Fts5 entities.
 private suspend fun createSearchIndex(
     connection: SQLiteConnection,
@@ -426,6 +695,80 @@ private suspend fun createSearchIndex(
     connection.execSQL("INSERT INTO `$table`(`$table`) VALUES('rebuild')")
 }
 
+val MIGRATION_35_36 =
+    object : Migration(35, 36) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL("ALTER TABLE `artists` ADD COLUMN `artistImageUrl` TEXT")
+            connection.execSQL("ALTER TABLE `artists` ADD COLUMN `coverArts` TEXT NOT NULL DEFAULT ''")
+            connection.execSQL("ALTER TABLE `artists` ADD COLUMN `downloadedCoverArts` TEXT NOT NULL DEFAULT ''")
+            optimizeArtistSearchTriggers(connection)
+            backfillArtistArt(connection)
+        }
+    }
+
+val MIGRATION_36_37 =
+    object : Migration(36, 37) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL(
+                "CREATE INDEX IF NOT EXISTS `index_albums_name_plain` ON `albums` (`sourceId`, `name`, `id`)",
+            )
+            connection.execSQL(
+                "CREATE INDEX IF NOT EXISTS `index_albums_artist_plain` " +
+                    "ON `albums` (`sourceId`, `albumArtist`, `year`, `name`, `id`)",
+            )
+            connection.execSQL(
+                "CREATE INDEX IF NOT EXISTS `index_artists_name_plain` ON `artists` (`sourceId`, `name`, `id`)",
+            )
+        }
+    }
+
+val MIGRATION_37_38 =
+    object : Migration(37, 38) {
+        override suspend fun migrate(connection: SQLiteConnection) {
+            connection.execSQL("ALTER TABLE `playlists` ADD COLUMN `owner` TEXT")
+            connection.execSQL("ALTER TABLE `playlists` ADD COLUMN `shared` INTEGER NOT NULL DEFAULT 0")
+        }
+    }
+
+internal fun artistSearchTriggersOptimized(connection: SQLiteConnection): Boolean {
+    val triggers = mutableListOf<String>()
+    connection.prepare("SELECT sql FROM sqlite_master WHERE type = 'trigger' AND name IN (?, ?)").use { statement ->
+        statement.bindText(1, "room_fts_content_sync_artist_search_BEFORE_UPDATE")
+        statement.bindText(2, "room_fts_content_sync_artist_search_AFTER_UPDATE")
+        while (statement.step()) triggers += statement.getText(0)
+    }
+    return triggers.size == 2 && triggers.all { it.contains("UPDATE OF `name`, `sortName`") }
+}
+
+internal fun optimizeArtistSearchTriggers(connection: SQLiteConnection) {
+    connection.execSQL("DROP TRIGGER IF EXISTS room_fts_content_sync_artist_search_BEFORE_UPDATE")
+    connection.execSQL("DROP TRIGGER IF EXISTS room_fts_content_sync_artist_search_AFTER_UPDATE")
+    connection.execSQL(
+        "CREATE TRIGGER IF NOT EXISTS room_fts_content_sync_artist_search_BEFORE_UPDATE " +
+            "BEFORE UPDATE OF `name`, `sortName` ON `artists` BEGIN " +
+            "DELETE FROM `artist_search` WHERE `rowid`=OLD.`rowid`; END",
+    )
+    connection.execSQL(
+        "CREATE TRIGGER IF NOT EXISTS room_fts_content_sync_artist_search_AFTER_UPDATE " +
+            "AFTER UPDATE OF `name`, `sortName` ON `artists` BEGIN " +
+            "INSERT INTO `artist_search`(`rowid`, `name`, `sortName`) " +
+            "VALUES (NEW.`rowid`, NEW.`name`, NEW.`sortName`); END",
+    )
+}
+
+private suspend fun backfillArtistArt(connection: SQLiteConnection) {
+    val sourceIds = mutableListOf<Long>()
+    connection.prepare("SELECT id FROM sources").use { statement ->
+        while (statement.step()) sourceIds += statement.getLong(0)
+    }
+    sourceIds.forEach { sourceId ->
+        connection.prepare(ARTIST_ART_UPDATE_SQL).use { statement ->
+            statement.bindLong(1, sourceId)
+            statement.step()
+        }
+    }
+}
+
 val MIGRATIONS: Array<Migration> =
     arrayOf(
         MIGRATION_1_2,
@@ -455,4 +798,14 @@ val MIGRATIONS: Array<Migration> =
         MIGRATION_25_26,
         MIGRATION_26_27,
         MIGRATION_27_28,
+        MIGRATION_28_29,
+        MIGRATION_29_30,
+        MIGRATION_30_31,
+        MIGRATION_31_32,
+        MIGRATION_32_33,
+        MIGRATION_33_34,
+        MIGRATION_34_35,
+        MIGRATION_35_36,
+        MIGRATION_36_37,
+        MIGRATION_37_38,
     )

app/src/main/kotlin/com/subtracks/data/db/QueueDao.kt

@@ -19,13 +19,16 @@ private const val ALBUM_SONGS_ORDER = " ORDER BY songs.disc, songs.track, songs.
 
 private const val ALBUM_SONGS_SQL = ALBUM_SONGS_SELECT + ALBUM_SONGS_ORDER
 
+private const val ARTIST_SONG_IDS =
+    "(SELECT songId FROM ($CREDITED_SONG_ROWS) WHERE artistId = :artistId)"
+
 private const val ARTIST_SONGS_SELECT =
     "SELECT songs.*, albums.coverArt AS coverArt FROM songs " +
-        "JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
-        "WHERE songs.sourceId = :sourceId AND (albums.artistId = :artistId OR songs.artistId = :artistId)"
+        "LEFT JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
+        "WHERE songs.sourceId = :sourceId AND songs.id IN $ARTIST_SONG_IDS"
 
 private const val ARTIST_SONGS_ORDER =
-    " ORDER BY albums.year DESC, albums.name COLLATE NOCASE, albums.id, songs.disc, songs.track, songs.id"
+    " ORDER BY albums.id IS NULL, albums.year DESC, albums.sortName COLLATE NOCASE, albums.id, songs.disc, songs.track, songs.id"
 
 private const val SONG_SQL =
     "SELECT songs.*, albums.coverArt AS coverArt FROM songs " +
@@ -82,8 +85,8 @@ interface QueueDao {
 
     @Query(
         "SELECT COUNT(*) FROM songs " +
-            "JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
-            "WHERE songs.sourceId = :sourceId AND (albums.artistId = :artistId OR songs.artistId = :artistId)",
+            "LEFT JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
+            "WHERE songs.sourceId = :sourceId AND songs.id IN $ARTIST_SONG_IDS",
     )
     suspend fun artistLength(
         sourceId: Long,
@@ -190,8 +193,8 @@ interface QueueDao {
 
     @Query(
         "SELECT songs.id FROM songs " +
-            "JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
-            "WHERE songs.sourceId = :sourceId AND (albums.artistId = :artistId OR songs.artistId = :artistId)" +
+            "LEFT JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
+            "WHERE songs.sourceId = :sourceId AND songs.id IN $ARTIST_SONG_IDS" +
             ARTIST_SONGS_ORDER,
     )
     suspend fun artistSongIds(
@@ -211,14 +214,34 @@ interface QueueDao {
     ): List<String>
 
     @Query(
-        "SELECT songs.*, albums.coverArt AS coverArt FROM songs " +
-            "LEFT JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
-            "WHERE songs.sourceId = :sourceId AND songs.id IN (:ids)",
+        "SELECT CASE WHEN EXISTS (SELECT 1 FROM songs WHERE sourceId = :sourceId AND albumId = :albumId AND id = :songId) " +
+            "THEN (SELECT COUNT(*) FROM songs ranked CROSS JOIN songs target " +
+            "WHERE ranked.sourceId = :sourceId AND ranked.albumId = :albumId " +
+            "AND target.sourceId = :sourceId AND target.albumId = :albumId AND target.id = :songId " +
+            "AND ((ranked.disc IS NULL AND target.disc IS NOT NULL) OR ranked.disc < target.disc OR " +
+            "(ranked.disc IS target.disc AND ((ranked.track IS NULL AND target.track IS NOT NULL) OR ranked.track < target.track OR " +
+            "(ranked.track IS target.track AND ranked.id < target.id))))) END",
     )
-    suspend fun songsByIds(
+    suspend fun albumRank(
         sourceId: Long,
-        ids: List<String>,
-    ): List<AlbumSongItem>
+        albumId: String,
+        songId: String,
+    ): Long?
+
+    @Query(
+        "SELECT CASE WHEN firstPosition IS NULL THEN NULL ELSE " +
+            "(SELECT COUNT(*) - 1 FROM playlist_songs " +
+            "JOIN songs ON songs.sourceId = playlist_songs.sourceId AND songs.id = playlist_songs.songId " +
+            "WHERE playlist_songs.sourceId = :sourceId AND playlist_songs.playlistId = :playlistId AND position <= firstPosition) END " +
+            "FROM (SELECT MIN(position) AS firstPosition FROM playlist_songs " +
+            "JOIN songs ON songs.sourceId = playlist_songs.sourceId AND songs.id = playlist_songs.songId " +
+            "WHERE playlist_songs.sourceId = :sourceId AND playlist_songs.playlistId = :playlistId AND songId = :songId)",
+    )
+    suspend fun playlistRank(
+        sourceId: Long,
+        playlistId: String,
+        songId: String,
+    ): Long?
 
     @Query("SELECT COUNT(*) FROM song_genres WHERE sourceId = :sourceId AND genre = :genre")
     suspend fun genreLength(
@@ -231,7 +254,7 @@ interface QueueDao {
             "JOIN songs ON songs.sourceId = song_genres.sourceId AND songs.id = song_genres.songId " +
             "LEFT JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
             "WHERE song_genres.sourceId = :sourceId AND song_genres.genre = :genre " +
-            "ORDER BY songs.title COLLATE NOCASE, songs.id LIMIT :limit OFFSET :offset",
+            "ORDER BY songs.sortName COLLATE NOCASE, songs.id LIMIT :limit OFFSET :offset",
     )
     suspend fun genreSongs(
         sourceId: Long,
@@ -240,17 +263,6 @@ interface QueueDao {
         limit: Int,
     ): List<AlbumSongItem>
 
-    @Query(
-        "SELECT songs.id FROM song_genres " +
-            "JOIN songs ON songs.sourceId = song_genres.sourceId AND songs.id = song_genres.songId " +
-            "WHERE song_genres.sourceId = :sourceId AND song_genres.genre = :genre " +
-            "ORDER BY songs.title COLLATE NOCASE, songs.id",
-    )
-    suspend fun genreSongIds(
-        sourceId: Long,
-        genre: String,
-    ): List<String>
-
     @Query("SELECT COUNT(*) FROM song_downloads WHERE sourceId = :sourceId AND status = 'Completed'")
     suspend fun downloadedLength(sourceId: Long): Long
 
@@ -261,7 +273,7 @@ interface QueueDao {
         "SELECT songs.*, albums.coverArt AS coverArt FROM songs " +
             "LEFT JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
             "WHERE songs.sourceId = :sourceId AND songs.starred IS NOT NULL " +
-            "ORDER BY songs.starred DESC, songs.title COLLATE NOCASE, songs.id LIMIT :limit OFFSET :offset",
+            "ORDER BY songs.starred DESC, songs.sortName COLLATE NOCASE, songs.id LIMIT :limit OFFSET :offset",
     )
     suspend fun starredSongs(
         sourceId: Long,
@@ -269,30 +281,16 @@ interface QueueDao {
         limit: Int,
     ): List<AlbumSongItem>
 
-    @Query(
-        "SELECT songs.id FROM songs WHERE sourceId = :sourceId AND starred IS NOT NULL " +
-            "ORDER BY starred DESC, title COLLATE NOCASE, id",
-    )
-    suspend fun starredSongIds(sourceId: Long): List<String>
-
     @Query(
         "SELECT songs.*, albums.coverArt AS coverArt FROM song_downloads d " +
             "JOIN songs ON songs.sourceId = d.sourceId AND songs.id = d.songId " +
             "LEFT JOIN albums ON albums.sourceId = songs.sourceId AND albums.id = songs.albumId " +
             "WHERE d.sourceId = :sourceId AND d.status = 'Completed' " +
-            "ORDER BY d.downloadedAt DESC, songs.title COLLATE NOCASE, songs.id LIMIT :limit OFFSET :offset",
+            "ORDER BY d.downloadedAt DESC, songs.sortName COLLATE NOCASE, songs.id LIMIT :limit OFFSET :offset",
     )
     suspend fun downloadedSongs(
         sourceId: Long,
         offset: Long,
         limit: Int,
     ): List<AlbumSongItem>
-
-    @Query(
-        "SELECT songs.id FROM song_downloads d " +
-            "JOIN songs ON songs.sourceId = d.sourceId AND songs.id = d.songId " +
-            "WHERE d.sourceId = :sourceId AND d.status = 'Completed' " +
-            "ORDER BY d.downloadedAt DESC, songs.title COLLATE NOCASE, songs.id",
-    )
-    suspend fun downloadedSongIds(sourceId: Long): List<String>
 }

app/src/main/kotlin/com/subtracks/data/db/SourcesDao.kt

@@ -29,6 +29,22 @@ interface SourcesDao {
     @Query("SELECT id FROM sources WHERE isActive = 1 LIMIT 1")
     suspend fun activeSourceIdOnce(): Long?
 
+    @Query("SELECT creditsStale FROM sources WHERE id = :sourceId")
+    suspend fun creditsStale(sourceId: Long): Boolean?
+
+    @Query("UPDATE sources SET creditsStale = :stale WHERE id = :sourceId AND creditsStale != :stale")
+    suspend fun setCreditsStale(
+        sourceId: Long,
+        stale: Boolean,
+    )
+
+    @Query("UPDATE sources SET name = :name, address = :address WHERE id = :sourceId")
+    suspend fun updateSourceDetails(
+        sourceId: Long,
+        name: String,
+        address: String,
+    )
+
     @Insert
     suspend fun insertSource(source: Source): Long
 

app/src/main/kotlin/com/subtracks/data/db/SubtracksDatabase.kt

@@ -4,8 +4,11 @@ import androidx.room3.ColumnTypeConverters
 import androidx.room3.Database
 import androidx.room3.RoomDatabase
 import com.subtracks.data.model.Album
+import com.subtracks.data.model.AlbumArtistRef
 import com.subtracks.data.model.AlbumSearch
 import com.subtracks.data.model.Artist
+import com.subtracks.data.model.ArtistBio
+import com.subtracks.data.model.ArtistRefsConverter
 import com.subtracks.data.model.ArtistSearch
 import com.subtracks.data.model.ArtworkSeed
 import com.subtracks.data.model.Disc
@@ -20,10 +23,12 @@ import com.subtracks.data.model.PlaylistSong
 import com.subtracks.data.model.QueueEntry
 import com.subtracks.data.model.QueueKindConverter
 import com.subtracks.data.model.Song
+import com.subtracks.data.model.SongArtistRef
 import com.subtracks.data.model.SongDownload
 import com.subtracks.data.model.SongGenre
 import com.subtracks.data.model.SongSearch
 import com.subtracks.data.model.Source
+import com.subtracks.data.model.StringListConverter
 import com.subtracks.data.model.SubsonicSource
 import com.subtracks.data.model.UpNextEntry
 
@@ -32,15 +37,18 @@ import com.subtracks.data.model.UpNextEntry
         Source::class,
         SubsonicSource::class,
         Artist::class,
+        ArtistBio::class,
         ArtistSearch::class,
         Album::class,
         AlbumSearch::class,
         Disc::class,
+        AlbumArtistRef::class,
         Playlist::class,
         PlaylistSearch::class,
         PlaylistSong::class,
         Song::class,
         SongGenre::class,
+        SongArtistRef::class,
         SongSearch::class,
         QueueEntry::class,
         UpNextEntry::class,
@@ -49,7 +57,7 @@ import com.subtracks.data.model.UpNextEntry
         SongDownload::class,
         PendingAction::class,
     ],
-    version = 28,
+    version = 38,
     exportSchema = true,
 )
 @ColumnTypeConverters(
@@ -57,6 +65,8 @@ import com.subtracks.data.model.UpNextEntry
     DownloadStatusConverter::class,
     DownloadErrorConverter::class,
     PendingActionKindConverter::class,
+    ArtistRefsConverter::class,
+    StringListConverter::class,
 )
 abstract class SubtracksDatabase : RoomDatabase() {
     abstract fun libraryDao(): LibraryDao

app/src/main/kotlin/com/subtracks/data/model/CoverArtRef.kt

@@ -10,3 +10,8 @@ fun coverArtKey(
     coverArt: String,
     thumbnail: Boolean,
 ): String = "$sourceId:$coverArt:$thumbnail"
+
+fun artistImageKey(
+    sourceId: Long,
+    artistId: String,
+): String = "$sourceId:artist-image:$artistId"

app/src/main/kotlin/com/subtracks/data/model/Download.kt

@@ -58,9 +58,14 @@ data class SongDownload(
     @ColumnInfo(defaultValue = "0") val downloadedAt: Long = 0,
 ) {
     val progress: Float?
-        get() = total.takeIf { it > 0 }?.let { (bytes.toFloat() / it).coerceIn(0f, 1f) }
+        get() = fractionOf(bytes, total)
 }
 
+internal fun fractionOf(
+    bytes: Long,
+    total: Long,
+): Float? = total.takeIf { it > 0 }?.let { (bytes.toFloat() / it).coerceIn(0f, 1f) }
+
 enum class DownloadList { Album, Playlist, Artist }
 
 enum class BulkDownloadAction { Download, Cancel, Delete }
@@ -94,19 +99,24 @@ data class DownloadedSong(
     val size: Long = 0,
     val bytes: Long = 0,
     val total: Long = 0,
+    val artistSort: String = artistName.orEmpty(),
+    val albumSort: String = albumName.orEmpty(),
+    val songSort: String = title,
 ) {
     val progress: Float?
-        get() = total.takeIf { it > 0 }?.let { (bytes.toFloat() / it).coerceIn(0f, 1f) }
+        get() = fractionOf(bytes, total)
 }
 
 data class DownloadArtwork(
     val sourceId: Long,
     val albumId: String?,
     val artistId: String?,
+    val albumArtistId: String?,
     val albumRow: String?,
     val artistRow: String?,
     val albumCoverArt: String?,
     val artistCoverArt: String?,
+    val albumArtistCoverArt: String?,
 ) {
     val hasMissingLibraryRow: Boolean
         get() = (albumId != null && albumRow == null) || (artistId != null && artistRow == null)

app/src/main/kotlin/com/subtracks/data/model/Models.kt

@@ -18,6 +18,7 @@ data class Source(
     val address: String,
     val isActive: Boolean = false,
     val createdAt: Long,
+    @ColumnInfo(defaultValue = "1") val creditsStale: Boolean = true,
 )
 
 @Entity(
@@ -39,6 +40,11 @@ data class SubsonicSource(
     val useTokenAuth: Boolean = true,
 )
 
+data class ArtistRef(
+    val id: String,
+    val name: String,
+)
+
 @Entity(
     tableName = "artists",
     primaryKeys = ["sourceId", "id"],
@@ -52,25 +58,26 @@ data class SubsonicSource(
     ],
     indices = [
         Index("sourceId"),
-        Index(name = "index_artists_name", value = ["sourceId", "name", "id"]),
+        Index(name = "index_artists_name", value = ["sourceId", "sortName", "id"]),
+        Index(name = "index_artists_name_plain", value = ["sourceId", "name", "id"]),
         Index(
             name = "index_artists_albumCount",
-            value = ["sourceId", "albumCount", "name", "id"],
+            value = ["sourceId", "albumCount", "sortName", "id"],
             orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
         Index(
             name = "index_artists_starred",
-            value = ["sourceId", "starred", "name", "id"],
+            value = ["sourceId", "starred", "sortName", "id"],
             orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
         Index(
             name = "index_artists_frequent",
-            value = ["sourceId", "playCount", "name", "id"],
+            value = ["sourceId", "playCount", "sortName", "id"],
             orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
         Index(
             name = "index_artists_recent",
-            value = ["sourceId", "played", "name", "id"],
+            value = ["sourceId", "played", "sortName", "id"],
             orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
     ],
@@ -82,8 +89,32 @@ data class Artist(
     val albumCount: Long,
     val starred: Long?,
     val coverArt: String? = null,
+    val artistImageUrl: String? = null,
+    @ColumnInfo(defaultValue = "''") val coverArts: List<String> = emptyList(),
+    @ColumnInfo(defaultValue = "''") val downloadedCoverArts: List<String> = emptyList(),
     @ColumnInfo(defaultValue = "0") val playCount: Long = 0,
     val played: Long? = null,
+    @ColumnInfo(defaultValue = "0") val songCount: Long = 0,
+    @ColumnInfo(collate = ColumnInfo.NOCASE, defaultValue = "''") val sortName: String = name,
+    @ColumnInfo(defaultValue = "1") val credited: Boolean = true,
+)
+
+@Entity(
+    tableName = "artist_bios",
+    primaryKeys = ["sourceId", "artistId"],
+    foreignKeys = [
+        ForeignKey(
+            entity = Source::class,
+            parentColumns = ["id"],
+            childColumns = ["sourceId"],
+            onDelete = ForeignKey.CASCADE,
+        ),
+    ],
+)
+data class ArtistBio(
+    val sourceId: Long,
+    val artistId: String,
+    val biography: String?,
 )
 
 @Entity(
@@ -100,31 +131,33 @@ data class Artist(
     indices = [
         Index("sourceId"),
         Index("sourceId", "artistId"),
-        Index(name = "index_albums_name", value = ["sourceId", "name", "id"]),
-        Index(name = "index_albums_artist", value = ["sourceId", "albumArtist", "year", "name", "id"]),
+        Index(name = "index_albums_name", value = ["sourceId", "sortName", "id"]),
+        Index(name = "index_albums_name_plain", value = ["sourceId", "name", "id"]),
+        Index(name = "index_albums_artist", value = ["sourceId", "albumArtistSort", "year", "sortName", "id"]),
+        Index(name = "index_albums_artist_plain", value = ["sourceId", "albumArtist", "year", "name", "id"]),
         Index(
             name = "index_albums_year",
-            value = ["sourceId", "year", "name", "id"],
+            value = ["sourceId", "year", "sortName", "id"],
             orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
         Index(
             name = "index_albums_added",
-            value = ["sourceId", "created", "name", "id"],
+            value = ["sourceId", "created", "sortName", "id"],
             orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
         Index(
             name = "index_albums_starred",
-            value = ["sourceId", "starred", "name", "id"],
+            value = ["sourceId", "starred", "sortName", "id"],
             orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
         Index(
             name = "index_albums_frequent",
-            value = ["sourceId", "playCount", "name", "id"],
+            value = ["sourceId", "playCount", "sortName", "id"],
             orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
         Index(
             name = "index_albums_recent",
-            value = ["sourceId", "played", "name", "id"],
+            value = ["sourceId", "played", "sortName", "id"],
             orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
     ],
@@ -144,7 +177,26 @@ data class Album(
     @Ignore val discTitles: Map<Long, String> = emptyMap(),
     @ColumnInfo(defaultValue = "0") val playCount: Long = 0,
     val played: Long? = null,
-)
+    @ColumnInfo(defaultValue = "''") val artists: List<ArtistRef> = emptyList(),
+    @ColumnInfo(collate = ColumnInfo.NOCASE, defaultValue = "''") val sortName: String = name,
+    @ColumnInfo(collate = ColumnInfo.NOCASE, defaultValue = "''") val albumArtistSort: String = albumArtist.orEmpty(),
+) {
+    val artistRefs: List<ArtistRef>
+        get() =
+            artists.ifEmpty {
+                artistId
+                    ?.takeIf { it.isNotBlank() }
+                    ?.let { listOf(ArtistRef(it, albumArtist.orEmpty())) }
+                    .orEmpty()
+            }
+}
+
+data class ArtistAlbums(
+    val albumCredits: List<Album> = emptyList(),
+    val appearances: List<Album> = emptyList(),
+) {
+    val count: Int get() = albumCredits.size + appearances.size
+}
 
 @Entity(
     tableName = "discs",
@@ -202,6 +254,8 @@ data class Playlist(
     val created: Long,
     @ColumnInfo(defaultValue = "0") val changed: Long = 0,
     @ColumnInfo(defaultValue = "0") val duration: Long = 0,
+    val owner: String? = null,
+    @ColumnInfo(defaultValue = "0") val shared: Boolean = false,
 )
 
 @Entity(
@@ -243,8 +297,8 @@ data class PlaylistSong(
         ),
         Index(
             name = "index_songs_starred",
-            value = ["sourceId", "starred", "id"],
-            orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC],
+            value = ["sourceId", "starred", "sortName", "id"],
+            orders = [Index.Order.ASC, Index.Order.DESC, Index.Order.ASC, Index.Order.ASC],
         ),
     ],
 )
@@ -269,7 +323,19 @@ data class Song(
     val trackPeak: Float? = null,
     val albumPeak: Float? = null,
     @Ignore val genres: List<String> = emptyList(),
-)
+    @ColumnInfo(defaultValue = "''") val artists: List<ArtistRef> = emptyList(),
+    @ColumnInfo(collate = ColumnInfo.NOCASE, defaultValue = "''") val sortName: String = title,
+    @ColumnInfo(collate = ColumnInfo.NOCASE, defaultValue = "''") val artistSort: String = artist.orEmpty(),
+) {
+    val artistRefs: List<ArtistRef>
+        get() =
+            artists.ifEmpty {
+                artistId
+                    ?.takeIf { it.isNotBlank() }
+                    ?.let { listOf(ArtistRef(it, artist.orEmpty())) }
+                    .orEmpty()
+            }
+}
 
 @Entity(
     tableName = "song_genres",
@@ -291,6 +357,48 @@ data class SongGenre(
     val genre: String,
 )
 
+@Entity(
+    tableName = "album_artists",
+    primaryKeys = ["sourceId", "albumId", "position"],
+    foreignKeys = [
+        ForeignKey(
+            entity = Album::class,
+            parentColumns = ["sourceId", "id"],
+            childColumns = ["sourceId", "albumId"],
+            onDelete = ForeignKey.CASCADE,
+        ),
+    ],
+    indices = [Index("sourceId", "artistId")],
+)
+data class AlbumArtistRef(
+    val sourceId: Long,
+    val albumId: String,
+    val position: Long,
+    val artistId: String,
+    val name: String,
+)
+
+@Entity(
+    tableName = "song_artists",
+    primaryKeys = ["sourceId", "songId", "position"],
+    foreignKeys = [
+        ForeignKey(
+            entity = Song::class,
+            parentColumns = ["sourceId", "id"],
+            childColumns = ["sourceId", "songId"],
+            onDelete = ForeignKey.CASCADE,
+        ),
+    ],
+    indices = [Index("sourceId", "artistId")],
+)
+data class SongArtistRef(
+    val sourceId: Long,
+    val songId: String,
+    val position: Long,
+    val artistId: String,
+    val name: String,
+)
+
 enum class PendingActionKind { Scrobble, Star, Unstar }
 
 @Entity(
@@ -438,6 +546,8 @@ data class AlbumSearch(
     @PrimaryKey @ColumnInfo(name = "rowid") val rowId: Long = 0,
     val name: String,
     val albumArtist: String?,
+    val sortName: String,
+    val albumArtistSort: String,
 )
 
 @Entity(tableName = "artist_search")
@@ -445,6 +555,7 @@ data class AlbumSearch(
 data class ArtistSearch(
     @PrimaryKey @ColumnInfo(name = "rowid") val rowId: Long = 0,
     val name: String,
+    val sortName: String,
 )
 
 @Entity(tableName = "playlist_search")
@@ -460,6 +571,8 @@ data class SongSearch(
     @PrimaryKey @ColumnInfo(name = "rowid") val rowId: Long = 0,
     val title: String,
     val artist: String?,
+    val sortName: String,
+    val artistSort: String,
 )
 
 class QueueKindConverter {
@@ -478,3 +591,53 @@ class PendingActionKindConverter {
     fun toPendingActionKind(value: String): PendingActionKind =
         PendingActionKind.entries.firstOrNull { it.name == value } ?: PendingActionKind.Scrobble
 }
+
+class ArtistRefsConverter {
+    @ColumnTypeConverter
+    fun fromArtistRefs(refs: List<ArtistRef>): String = ArtistRefsCodec.encode(refs)
+
+    @ColumnTypeConverter
+    fun toArtistRefs(value: String): List<ArtistRef> = ArtistRefsCodec.decode(value)
+}
+
+class StringListConverter {
+    @ColumnTypeConverter
+    fun fromList(values: List<String>): String = values.joinToString(LIST_SEPARATOR)
+
+    @ColumnTypeConverter
+    fun toList(value: String): List<String> = if (value.isEmpty()) emptyList() else value.split(LIST_SEPARATOR)
+}
+
+private const val LIST_SEPARATOR = "\u001F"
+
+object ArtistRefsCodec {
+    fun encode(refs: List<ArtistRef>): String =
+        buildString {
+            refs.forEach { ref ->
+                append(ref.id.length).append(':').append(ref.id)
+                append(ref.name.length).append(':').append(ref.name)
+            }
+        }
+
+    fun decode(value: String): List<ArtistRef> {
+        val refs = mutableListOf<ArtistRef>()
+        var index = 0
+        while (index < value.length) {
+            val idLengthEnd = value.indexOf(':', index)
+            if (idLengthEnd < 0) return refs
+            val idLength = value.substring(index, idLengthEnd).toIntOrNull() ?: return refs
+            val idStart = idLengthEnd + 1
+            val idEnd = idStart + idLength
+            if (idLength < 0 || idEnd > value.length) return refs
+            val nameLengthEnd = value.indexOf(':', idEnd)
+            if (nameLengthEnd < 0) return refs
+            val nameLength = value.substring(idEnd, nameLengthEnd).toIntOrNull() ?: return refs
+            val nameStart = nameLengthEnd + 1
+            val nameEnd = nameStart + nameLength
+            if (nameLength < 0 || nameEnd > value.length) return refs
+            refs += ArtistRef(value.substring(idStart, idEnd), value.substring(nameStart, nameEnd))
+            index = nameEnd
+        }
+        return refs
+    }
+}

app/src/main/kotlin/com/subtracks/data/prefs/UserPreferences.kt

@@ -16,6 +16,8 @@ import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.map
 
+enum class SortNameMode { SortName, Name, NonLatin }
+
 enum class AlbumSort { Name, Artist, Year, Added, Starred, Frequent, Recent }
 
 enum class ArtistSort { Name, AlbumCount, Starred, Frequent, Recent }
@@ -57,7 +59,7 @@ const val MAX_REPLAY_GAIN_PREAMP_DB = 15f
 
 enum class SyncMode { Off, WifiOnly, Always }
 
-enum class ReplayGainMode { Off, Track, Album }
+enum class ReplayGainMode { Off, Track, Album, Auto }
 
 data class ArtworkSeedValue(
     val cacheKey: String,
@@ -154,7 +156,7 @@ class UserPreferences(
 
     fun replayGainMode(): Flow<ReplayGainMode> =
         store.data.map { prefs ->
-            prefs[replayGainModeKey]?.let { stored -> ReplayGainMode.entries.firstOrNull { it.name == stored } } ?: ReplayGainMode.Track
+            prefs[replayGainModeKey]?.let { stored -> ReplayGainMode.entries.firstOrNull { it.name == stored } } ?: ReplayGainMode.Auto
         }
 
     suspend fun setReplayGainMode(mode: ReplayGainMode) {
@@ -182,6 +184,17 @@ class UserPreferences(
 
     private val keepScreenOnKey = booleanPreferencesKey("keep_screen_on")
 
+    fun sortNameMode(): Flow<SortNameMode> =
+        store.data.map { prefs ->
+            prefs[sortNameModeKey]?.let { stored -> SortNameMode.entries.firstOrNull { it.name == stored } } ?: SortNameMode.Name
+        }
+
+    suspend fun setSortNameMode(mode: SortNameMode) {
+        store.edit { prefs -> prefs[sortNameModeKey] = mode.name }
+    }
+
+    private val sortNameModeKey = stringPreferencesKey("sort_name_mode")
+
     fun offlineMode(): Flow<Boolean> = store.data.map { prefs -> prefs[offlineModeKey] ?: false }
 
     suspend fun setOfflineMode(enabled: Boolean) {

app/src/main/kotlin/com/subtracks/data/repo/DownloadRepository.kt

@@ -11,6 +11,8 @@ import com.subtracks.data.download.EngineDownload
 import com.subtracks.data.download.EngineRequest
 import com.subtracks.data.download.EngineStatus
 import com.subtracks.data.download.looksLikeAudio
+import com.subtracks.data.model.Artist
+import com.subtracks.data.model.ArtistBio
 import com.subtracks.data.model.BulkDownloadAction
 import com.subtracks.data.model.DownloadError
 import com.subtracks.data.model.DownloadList
@@ -18,6 +20,7 @@ import com.subtracks.data.model.DownloadStatus
 import com.subtracks.data.model.DownloadedSong
 import com.subtracks.data.model.ListDownloadStatus
 import com.subtracks.data.model.SongDownload
+import com.subtracks.data.model.artistImageKey
 import com.subtracks.data.model.coverArtKey
 import com.subtracks.log.Log
 import kotlinx.coroutines.CancellationException
@@ -43,6 +46,7 @@ import kotlinx.coroutines.sync.withLock
 import kotlinx.coroutines.withContext
 import kotlinx.coroutines.withTimeoutOrNull
 import java.io.File
+import java.util.concurrent.ConcurrentHashMap
 
 class DownloadRepository(
     private val db: SubtracksDatabase,
@@ -63,6 +67,8 @@ class DownloadRepository(
     private var started = false
 
     private val statesFlow = MutableStateFlow<Map<String, SongDownload>>(emptyMap())
+    private val attemptedBios = ConcurrentHashMap.newKeySet<Pair<Long, String>>()
+    private val failedArtistImages = ConcurrentHashMap.newKeySet<String>()
 
     fun start() {
         if (started) return
@@ -347,6 +353,9 @@ class DownloadRepository(
         rows.groupBy { it.sourceId }.forEach { (sourceId, group) ->
             group.forEach { file(sourceId, it.songId).delete() }
             group.map { it.songId }.chunked(DELETE_CHUNK).forEach { db.downloadDao().deleteSongs(sourceId, it) }
+            if (group.any { it.status == DownloadStatus.Completed }) {
+                refreshDownloadedArtistArt(sourceId, group.map { it.songId })
+            }
         }
         sweep(db.downloadDao().all())
     }
@@ -369,6 +378,7 @@ class DownloadRepository(
                     .mapNotNull { it.engineId }
                     .let(engine::cancel)
                 db.downloadDao().deleteSource(sourceId)
+                db.libraryDao().clearDownloadedArtistArt(sourceId)
                 dir(sourceId).deleteRecursively()
             }
         }
@@ -406,14 +416,18 @@ class DownloadRepository(
     private suspend fun fetchArtwork(
         sourceId: Long,
         songId: String,
+        artistIds: MutableSet<String>,
     ) {
         val song = db.libraryDao().songOnce(sourceId, songId)
+        val album = song?.albumId?.let { db.libraryDao().albumOnce(sourceId, it) }
+        val songArtist = song?.artistId?.let { db.libraryDao().artistOnce(sourceId, it) }
+        val albumArtist = album?.artistId?.let { db.libraryDao().artistOnce(sourceId, it) }
+        listOfNotNull(song?.artistId, album?.artistId).forEach(artistIds::add)
+        listOfNotNull(songArtist, albumArtist).forEach { storeArtistImage(sourceId, it) }
         val coverArt =
             (
-                listOfNotNull(
-                    song?.albumId?.let { db.libraryDao().albumOnce(sourceId, it)?.coverArt },
-                    song?.artistId?.let { db.libraryDao().artistOnce(sourceId, it)?.coverArt },
-                ) + db.downloadDao().playlistCoversForSong(sourceId, songId)
+                listOfNotNull(album?.coverArt) +
+                    db.downloadDao().playlistCoversForSong(sourceId, songId)
             ).distinct()
         coverArt.forEach { cover ->
             storeArtwork(sourceId, cover, thumbnail = false)
@@ -421,6 +435,67 @@ class DownloadRepository(
         }
     }
 
+    private suspend fun storeArtistImage(
+        sourceId: Long,
+        artist: Artist,
+    ) {
+        val imageUrl = artist.artistImageUrl
+        if (!imageUrl.isNullOrBlank()) {
+            val cacheKey = artistImageKey(sourceId, artist.id)
+            if (artworkStore.file(sourceId, cacheKey).exists()) return
+            val attemptKey = "$sourceId:${artist.id}:$imageUrl"
+            if (attemptKey !in failedArtistImages) {
+                val bytes =
+                    try {
+                        artworkFetcher.fetch(imageUrl)
+                    } catch (e: CancellationException) {
+                        throw e
+                    } catch (_: Exception) {
+                        null
+                    }
+                if (bytes != null && bytes.isNotEmpty()) {
+                    artworkStore.write(sourceId, cacheKey, bytes)
+                    return
+                }
+                failedArtistImages += attemptKey
+            }
+        }
+        artist.coverArt?.let {
+            storeArtwork(sourceId, it, thumbnail = false)
+            storeArtwork(sourceId, it, thumbnail = true)
+        }
+    }
+
+    private suspend fun fetchArtistBio(
+        sourceId: Long,
+        artistId: String,
+    ) {
+        if (db.libraryDao().artistBioOnce(sourceId, artistId) != null) return
+        val key = sourceId to artistId
+        if (!attemptedBios.add(key)) return
+        try {
+            val biography = sourceRepository.artistBiography(sourceId, artistId)
+            db.libraryDao().upsertArtistBio(
+                ArtistBio(sourceId, artistId, normalizeBiography(biography)),
+            )
+        } catch (e: CancellationException) {
+            throw e
+        } catch (_: Exception) {
+        } finally {
+            attemptedBios.remove(key)
+        }
+    }
+
+    private suspend fun fetchArtistBiosSafely(
+        sourceId: Long,
+        artistIds: Set<String>,
+    ) {
+        if (artistIds.isEmpty()) return
+        withTimeoutOrNull(BIO_TIMEOUT_MS) {
+            artistIds.forEach { fetchArtistBio(sourceId, it) }
+        }
+    }
+
     private suspend fun storeArtwork(
         sourceId: Long,
         coverArt: String,
@@ -455,11 +530,15 @@ class DownloadRepository(
             .mapValues { (sourceId, rows) ->
                 if (rows.any { it.hasMissingLibraryRow }) return@mapValues null
                 val covers =
-                    rows.flatMap { row -> listOfNotNull(row.albumCoverArt, row.artistCoverArt) } +
-                        playlistCovers[sourceId].orEmpty()
-                covers
-                    .flatMap { cover -> listOf(false, true).map { thumbnail -> coverArtKey(sourceId, cover, thumbnail) } }
-                    .toSet()
+                    rows.flatMap { row ->
+                        listOfNotNull(row.albumCoverArt, row.artistCoverArt, row.albumArtistCoverArt)
+                    } + playlistCovers[sourceId].orEmpty()
+                val artistImages = rows.flatMap { row -> listOfNotNull(row.artistId, row.albumArtistId) }
+                (
+                    covers.flatMap { cover ->
+                        listOf(false, true).map { thumbnail -> coverArtKey(sourceId, cover, thumbnail) }
+                    } + artistImages.map { artistImageKey(sourceId, it) }
+                ).toSet()
             }
     }
 
@@ -509,6 +588,7 @@ class DownloadRepository(
         row.engineId?.let { engine.cancel(listOf(it)) }
         file(sourceId, songId).delete()
         db.downloadDao().delete(sourceId, songId)
+        if (row.status == DownloadStatus.Completed) refreshDownloadedArtistArt(sourceId, listOf(songId))
         return true
     }
 
@@ -537,11 +617,12 @@ class DownloadRepository(
         sourceId: Long,
         songIds: List<String>,
     ) {
+        val artistIds = mutableSetOf<String>()
         try {
             withTimeoutOrNull(ART_TIMEOUT_MS) {
                 songIds.forEach { songId ->
                     // A cancel between the queue and this pass takes the row away; nothing to warm.
-                    if (db.downloadDao().find(sourceId, songId) != null) fetchArtwork(sourceId, songId)
+                    if (db.downloadDao().find(sourceId, songId) != null) fetchArtwork(sourceId, songId, artistIds)
                 }
             }
         } catch (e: CancellationException) {
@@ -549,6 +630,7 @@ class DownloadRepository(
         } catch (_: Exception) {
             // Artwork is best effort and must never disturb a download that is already running.
         }
+        fetchArtistBiosSafely(sourceId, artistIds)
     }
 
     private suspend fun apply(
@@ -587,6 +669,11 @@ class DownloadRepository(
                     },
             )
         if (updated != row) db.downloadDao().upsert(updated)
+        if (updated.status != row.status &&
+            (updated.status == DownloadStatus.Completed || row.status == DownloadStatus.Completed)
+        ) {
+            refreshDownloadedArtistArt(row.sourceId, listOf(row.songId))
+        }
         if (updated.status != row.status) {
             when (updated.status) {
                 DownloadStatus.Completed -> Log.i("download", "completed ${row.songId} (${updated.total} bytes)")
@@ -604,9 +691,22 @@ class DownloadRepository(
         row.engineId?.let { engine.cancel(listOf(it)) }
         file(row.sourceId, row.songId).delete()
         db.downloadDao().upsert(row.copy(status = DownloadStatus.Failed, engineId = null, error = error))
+        if (row.status == DownloadStatus.Completed) {
+            refreshDownloadedArtistArt(row.sourceId, listOf(row.songId))
+        }
         Log.w("download", "failed ${row.songId}: $error")
     }
 
+    private suspend fun refreshDownloadedArtistArt(
+        sourceId: Long,
+        songIds: Collection<String>,
+    ) {
+        songIds.chunked(500).forEach { songs ->
+            val artistIds = db.libraryDao().creditedArtistIdsForSongs(sourceId, songs).distinct()
+            artistIds.chunked(500).forEach { db.libraryDao().recomputeDownloadedArtistArt(sourceId, it) }
+        }
+    }
+
     private fun ensurePolling() {
         if (pollJob?.isActive == true) return
         pollJob =
@@ -673,5 +773,6 @@ class DownloadRepository(
         const val IN_FLIGHT_LIMIT = 8
         const val DELETE_CHUNK = 900
         const val ART_TIMEOUT_MS = 60_000L
+        const val BIO_TIMEOUT_MS = 30_000L
     }
 }

app/src/main/kotlin/com/subtracks/data/repo/LibraryRepository.kt

@@ -7,13 +7,15 @@ import androidx.paging.PagingSource
 import com.subtracks.R
 import com.subtracks.UiMessage
 import com.subtracks.data.db.SubtracksDatabase
-import com.subtracks.data.db.albumsDefaultQuery
-import com.subtracks.data.db.artistsDefaultQuery
-import com.subtracks.data.db.playlistsDefaultQuery
+import com.subtracks.data.db.albumsPageQuery
+import com.subtracks.data.db.artistsPageQuery
+import com.subtracks.data.db.playlistsPageQuery
 import com.subtracks.data.db.rediscoverAlbumsQuery
 import com.subtracks.data.model.Album
 import com.subtracks.data.model.AlbumSongItem
 import com.subtracks.data.model.Artist
+import com.subtracks.data.model.ArtistAlbums
+import com.subtracks.data.model.ArtistBio
 import com.subtracks.data.model.Disc
 import com.subtracks.data.model.Playlist
 import com.subtracks.data.model.PlaylistSongItem
@@ -22,25 +24,32 @@ import com.subtracks.data.prefs.AlbumSort
 import com.subtracks.data.prefs.ArtistSort
 import com.subtracks.data.prefs.PlaylistSort
 import com.subtracks.data.prefs.StarredFilter
+import com.subtracks.data.prefs.UserPreferences
 import com.subtracks.data.source.ServerActionSink
 import com.subtracks.data.source.StarType
 import com.subtracks.log.Log
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.NonCancellable
 import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import kotlinx.coroutines.withContext
 
+@OptIn(ExperimentalCoroutinesApi::class)
 class LibraryRepository(
     private val db: SubtracksDatabase,
     private val sourceRepository: SourceRepository,
     private val serverActions: ServerActionSink,
+    private val userPreferences: UserPreferences,
     private val showMessage: (UiMessage) -> Unit = {},
     private val scope: CoroutineScope = CoroutineScope(SupervisorJob() + Dispatchers.IO),
 ) {
@@ -107,12 +116,18 @@ class LibraryRepository(
     fun searchAlbums(
         sourceId: Long,
         query: String,
-    ): Flow<List<Album>> = db.libraryDao().searchAlbums(sourceId, query, SEARCH_RESULT_LIMIT)
+    ): Flow<List<Album>> =
+        userPreferences.sortNameMode().flatMapLatest { mode ->
+            db.libraryDao().searchAlbums(sourceId, query, SEARCH_RESULT_LIMIT, mode.name)
+        }
 
     fun searchArtists(
         sourceId: Long,
         query: String,
-    ): Flow<List<Artist>> = db.libraryDao().searchArtists(sourceId, query, SEARCH_RESULT_LIMIT)
+    ): Flow<List<Artist>> =
+        userPreferences.sortNameMode().flatMapLatest { mode ->
+            db.libraryDao().searchArtists(sourceId, query, SEARCH_RESULT_LIMIT, mode.name)
+        }
 
     fun searchPlaylists(
         sourceId: Long,
@@ -122,7 +137,10 @@ class LibraryRepository(
     fun searchSongs(
         sourceId: Long,
         query: String,
-    ): Flow<List<AlbumSongItem>> = db.libraryDao().searchSongs(sourceId, query, SEARCH_RESULT_LIMIT)
+    ): Flow<List<AlbumSongItem>> =
+        userPreferences.sortNameMode().flatMapLatest { mode ->
+            db.libraryDao().searchSongs(sourceId, query, SEARCH_RESULT_LIMIT, mode.name)
+        }
 
     fun downloadedAlbumsPage(sourceId: Long): Flow<PagingData<Album>> = pager(40) { db.libraryDao().downloadedAlbums(sourceId) }
 
@@ -136,9 +154,9 @@ class LibraryRepository(
     suspend fun genreSongOrdinal(
         sourceId: Long,
         genre: String,
-        title: String,
+        sortName: String,
         id: String,
-    ): Long = db.libraryDao().genreSongOrdinal(sourceId, genre, title, id)
+    ): Long = db.libraryDao().genreSongOrdinal(sourceId, genre, sortName, id)
 
     suspend fun downloadedSongOrdinal(
         sourceId: Long,
@@ -174,69 +192,20 @@ class LibraryRepository(
         search: String,
         downloaded: Boolean,
     ): Flow<PagingData<Album>> =
-        pager(40, enablePlaceholders = true) {
-            val dao = db.libraryDao()
-            if (!downloaded) {
-                dao.albumsPaging(albumsDefaultQuery(sourceId, starred.ordinal, search, sort, descending))
-            } else {
-                val downloadedFilter = 1
-                when (sort) {
-                    AlbumSort.Name -> {
-                        if (descending) {
-                            dao.albumsByNameReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.albumsByName(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    AlbumSort.Artist -> {
-                        if (descending) {
-                            dao.albumsByArtistReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.albumsByArtist(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    AlbumSort.Year -> {
-                        if (descending) {
-                            dao.albumsByYearReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.albumsByYear(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    AlbumSort.Added -> {
-                        if (descending) {
-                            dao.albumsByRecentlyAddedReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.albumsByRecentlyAdded(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    AlbumSort.Starred -> {
-                        if (descending) {
-                            dao.albumsByStarredReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.albumsByStarred(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    AlbumSort.Frequent -> {
-                        if (descending) {
-                            dao.albumsByFrequentReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.albumsByFrequent(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    AlbumSort.Recent -> {
-                        if (descending) {
-                            dao.albumsByRecentReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.albumsByRecent(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-                }
+        userPreferences.sortNameMode().flatMapLatest { mode ->
+            pager(40, enablePlaceholders = true) {
+                val dao = db.libraryDao()
+                val query =
+                    albumsPageQuery(
+                        sourceId = sourceId,
+                        starredFilter = starred.ordinal,
+                        search = search,
+                        sort = sort,
+                        descending = descending,
+                        downloaded = downloaded,
+                        sortNameMode = mode,
+                    )
+                if (downloaded) dao.downloadedAlbumsPaging(query) else dao.albumsPaging(query)
             }
         }
 
@@ -248,53 +217,20 @@ class LibraryRepository(
         search: String,
         downloaded: Boolean,
     ): Flow<PagingData<Artist>> =
-        pager(60) {
-            val dao = db.libraryDao()
-            if (!downloaded) {
-                dao.artistsPaging(artistsDefaultQuery(sourceId, starred.ordinal, search, sort, descending))
-            } else {
-                val downloadedFilter = 1
-                when (sort) {
-                    ArtistSort.Name -> {
-                        if (descending) {
-                            dao.artistsByNameReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.artistsByName(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    ArtistSort.AlbumCount -> {
-                        if (descending) {
-                            dao.artistsByAlbumCountReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.artistsByAlbumCount(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    ArtistSort.Starred -> {
-                        if (descending) {
-                            dao.artistsByStarredReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.artistsByStarred(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    ArtistSort.Frequent -> {
-                        if (descending) {
-                            dao.artistsByFrequentReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.artistsByFrequent(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-
-                    ArtistSort.Recent -> {
-                        if (descending) {
-                            dao.artistsByRecentReversed(sourceId, starred.ordinal, search, downloadedFilter)
-                        } else {
-                            dao.artistsByRecent(sourceId, starred.ordinal, search, downloadedFilter)
-                        }
-                    }
-                }
+        userPreferences.sortNameMode().flatMapLatest { mode ->
+            pager(60) {
+                val dao = db.libraryDao()
+                val query =
+                    artistsPageQuery(
+                        sourceId = sourceId,
+                        starredFilter = starred.ordinal,
+                        search = search,
+                        sort = sort,
+                        descending = descending,
+                        downloaded = downloaded,
+                        sortNameMode = mode,
+                    )
+                if (downloaded) dao.downloadedArtistsPaging(query) else dao.artistsPaging(query)
             }
         }
 
@@ -307,36 +243,15 @@ class LibraryRepository(
     ): Flow<PagingData<Playlist>> =
         pager(40) {
             val dao = db.libraryDao()
-            if (!downloaded) {
-                dao.playlistsPaging(playlistsDefaultQuery(sourceId, search, sort, descending))
-            } else {
-                val downloadedFilter = 1
-                when (sort) {
-                    PlaylistSort.Name -> {
-                        if (descending) {
-                            dao.playlistsByNameReversed(sourceId, search, downloadedFilter)
-                        } else {
-                            dao.playlistsByName(sourceId, search, downloadedFilter)
-                        }
-                    }
-
-                    PlaylistSort.Added -> {
-                        if (descending) {
-                            dao.playlistsByAddedReversed(sourceId, search, downloadedFilter)
-                        } else {
-                            dao.playlistsByAdded(sourceId, search, downloadedFilter)
-                        }
-                    }
-
-                    PlaylistSort.Updated -> {
-                        if (descending) {
-                            dao.playlistsByUpdatedReversed(sourceId, search, downloadedFilter)
-                        } else {
-                            dao.playlistsByUpdated(sourceId, search, downloadedFilter)
-                        }
-                    }
-                }
-            }
+            val query =
+                playlistsPageQuery(
+                    sourceId = sourceId,
+                    search = search,
+                    sort = sort,
+                    descending = descending,
+                    downloaded = downloaded,
+                )
+            if (downloaded) dao.downloadedPlaylistsPaging(query) else dao.playlistsPaging(query)
         }
 
     fun album(
@@ -354,6 +269,36 @@ class LibraryRepository(
         artistId: String,
     ): Flow<String?> = db.libraryDao().artistName(sourceId, artistId)
 
+    fun artistBio(
+        sourceId: Long,
+        artistId: String,
+    ): Flow<ArtistBio?> =
+        db
+            .libraryDao()
+            .artistBio(sourceId, artistId)
+            .map { bio -> bio?.copy(biography = normalizeBiography(bio.biography)) }
+
+    suspend fun refreshArtistBio(
+        sourceId: Long,
+        artistId: String,
+    ): Result<Unit> =
+        try {
+            val fetched = normalizeBiography(sourceRepository.artistBiography(sourceId, artistId))
+            val current = db.libraryDao().artistBioOnce(sourceId, artistId)
+            // An empty response can mean the metadata provider is temporarily down, so keep the
+            // cached biography instead of erasing it.
+            val biography = fetched ?: current?.biography
+            if (current == null || current.biography != biography) {
+                db.libraryDao().upsertArtistBio(ArtistBio(sourceId, artistId, biography))
+            }
+            Result.success(Unit)
+        } catch (cancellation: CancellationException) {
+            throw cancellation
+        } catch (failure: Exception) {
+            Log.w("artist", "failed to refresh bio for $artistId", failure)
+            Result.failure(failure)
+        }
+
     fun song(
         sourceId: Long,
         songId: String,
@@ -376,12 +321,24 @@ class LibraryRepository(
         sourceId: Long,
         artistId: String,
         downloaded: Boolean = false,
-    ): Flow<List<Album>> =
-        if (downloaded) {
-            db.libraryDao().albumsForArtistDownloaded(sourceId, artistId)
-        } else {
-            db.libraryDao().albumsForArtist(sourceId, artistId)
+    ): Flow<ArtistAlbums> {
+        val albums =
+            if (downloaded) {
+                db.libraryDao().albumsForArtistDownloaded(sourceId, artistId)
+            } else {
+                db.libraryDao().albumsForArtist(sourceId, artistId)
+            }
+        return combine(albums, db.libraryDao().albumCreditAlbumIds(sourceId, artistId)) { list, creditIds ->
+            val credits = creditIds.toHashSet()
+            val (albumCredits, appearances) = list.partition { it.id in credits }
+            ArtistAlbums(albumCredits = albumCredits, appearances = appearances)
         }
+    }
+
+    fun artistCoverArts(
+        sourceId: Long,
+        artistId: String,
+    ): Flow<List<String>> = db.libraryDao().artistCoverArts(sourceId, artistId)
 
     fun albumDiscs(
         sourceId: Long,
@@ -403,10 +360,7 @@ class LibraryRepository(
         sourceId: Long,
         albumId: String,
         songId: String,
-    ): Long {
-        val index = db.queueDao().albumSongIds(sourceId, albumId).indexOf(songId)
-        return if (index < 0) 0L else index.toLong()
-    }
+    ): Long = db.queueDao().albumRank(sourceId, albumId, songId) ?: 0L
 
     fun playlist(
         sourceId: Long,
@@ -520,4 +474,12 @@ const val REDISCOVER_WINDOW_MS = 60L * 24 * 60 * 60 * 1000
 
 const val SEARCH_RESULT_LIMIT = 50
 
+internal fun normalizeBiography(value: String?): String? =
+    value
+        ?.replace("\r\n", "\n")
+        ?.replace('\r', '\n')
+        ?.replace(Regex(" {3,}"), "\n\n")
+        ?.trim()
+        ?.takeIf { it.isNotEmpty() }
+
 fun rediscoverCutoff(): Long = System.currentTimeMillis() - REDISCOVER_WINDOW_MS

app/src/main/kotlin/com/subtracks/data/repo/QueueRepository.kt

@@ -164,6 +164,8 @@ data class QueueSnapshot(
     }
 
     fun locateContext(contextPlay: Long): Pair<QueueEntry, Long>? = locateIn(entries, flatContext(contextPlay) ?: return null)
+
+    fun isAlbumContext(position: Long): Boolean = locate(position)?.first?.kind == QueueKind.Album
 }
 
 private fun entryIndexAfter(
@@ -207,6 +209,202 @@ data class Reanchored(
     val changed: Boolean,
 )
 
+private interface QueueKindResolver {
+    fun supportsKeyset(key: OrderKey): Boolean = false
+
+    suspend fun length(
+        dao: com.subtracks.data.db.QueueDao,
+        entry: QueueEntry,
+    ): Long
+
+    suspend fun rows(
+        dao: com.subtracks.data.db.QueueDao,
+        entry: QueueEntry,
+        offset: Long,
+        limit: Int,
+    ): List<SongItem>
+
+    suspend fun rowsFrom(
+        dao: com.subtracks.data.db.QueueDao,
+        entry: QueueEntry,
+        key: OrderKey,
+        skip: Long,
+        limit: Int,
+    ): List<SongItem>? = null
+
+    suspend fun rowsBefore(
+        dao: com.subtracks.data.db.QueueDao,
+        entry: QueueEntry,
+        key: OrderKey,
+        skip: Long,
+        limit: Int,
+    ): List<SongItem>? = null
+
+    suspend fun rank(
+        dao: com.subtracks.data.db.QueueDao,
+        entry: QueueEntry,
+        songId: String,
+    ): Long? = null
+}
+
+private val queueKindResolvers =
+    mapOf<QueueKind, QueueKindResolver>(
+        QueueKind.Song to
+            object : QueueKindResolver {
+                override suspend fun length(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                ) = dao.songLength(entry.sourceId, entry.refId)
+
+                override suspend fun rows(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    offset: Long,
+                    limit: Int,
+                ) = dao.song(entry.sourceId, entry.refId, offset, limit)
+
+                override suspend fun rank(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    songId: String,
+                ) = if (entry.refId == songId && length(dao, entry) > 0) 0L else null
+            },
+        QueueKind.Playlist to
+            object : QueueKindResolver {
+                override fun supportsKeyset(key: OrderKey) = key.position != null
+
+                override suspend fun length(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                ) = dao.playlistLength(entry.sourceId, entry.refId)
+
+                override suspend fun rows(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    offset: Long,
+                    limit: Int,
+                ) = dao.playlistSongs(entry.sourceId, entry.refId, offset, limit)
+
+                override suspend fun rowsFrom(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    key: OrderKey,
+                    skip: Long,
+                    limit: Int,
+                ) = dao.playlistSongsFrom(entry.sourceId, entry.refId, key.position!!, skip, limit)
+
+                override suspend fun rowsBefore(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    key: OrderKey,
+                    skip: Long,
+                    limit: Int,
+                ) = dao.playlistSongsBefore(entry.sourceId, entry.refId, key.position!!, skip, limit)
+
+                override suspend fun rank(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    songId: String,
+                ) = dao.playlistRank(entry.sourceId, entry.refId, songId)
+            },
+        QueueKind.Album to
+            object : QueueKindResolver {
+                override fun supportsKeyset(key: OrderKey) = key.disc != null && key.track != null
+
+                override suspend fun length(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                ) = dao.albumLength(entry.sourceId, entry.refId)
+
+                override suspend fun rows(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    offset: Long,
+                    limit: Int,
+                ) = dao.albumSongs(entry.sourceId, entry.refId, offset, limit)
+
+                override suspend fun rowsFrom(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    key: OrderKey,
+                    skip: Long,
+                    limit: Int,
+                ) = dao.albumSongsFrom(entry.sourceId, entry.refId, key.disc!!, key.track!!, key.id, skip, limit)
+
+                override suspend fun rowsBefore(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    key: OrderKey,
+                    skip: Long,
+                    limit: Int,
+                ) = dao.albumSongsBefore(entry.sourceId, entry.refId, key.disc!!, key.track!!, key.id, skip, limit)
+
+                override suspend fun rank(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    songId: String,
+                ) = dao.albumRank(entry.sourceId, entry.refId, songId)
+            },
+        QueueKind.Artist to
+            object : QueueKindResolver {
+                override suspend fun length(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                ) = dao.artistLength(entry.sourceId, entry.refId)
+
+                override suspend fun rows(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    offset: Long,
+                    limit: Int,
+                ) = dao.artistSongs(entry.sourceId, entry.refId, offset, limit)
+            },
+        QueueKind.Genre to
+            object : QueueKindResolver {
+                override suspend fun length(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                ) = dao.genreLength(entry.sourceId, entry.refId)
+
+                override suspend fun rows(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    offset: Long,
+                    limit: Int,
+                ) = dao.genreSongs(entry.sourceId, entry.refId, offset, limit)
+            },
+        QueueKind.Downloaded to
+            object : QueueKindResolver {
+                override suspend fun length(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                ) = dao.downloadedLength(entry.sourceId)
+
+                override suspend fun rows(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    offset: Long,
+                    limit: Int,
+                ) = dao.downloadedSongs(entry.sourceId, offset, limit)
+            },
+        QueueKind.Starred to
+            object : QueueKindResolver {
+                override suspend fun length(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                ) = dao.starredLength(entry.sourceId)
+
+                override suspend fun rows(
+                    dao: com.subtracks.data.db.QueueDao,
+                    entry: QueueEntry,
+                    offset: Long,
+                    limit: Int,
+                ) = dao.starredSongs(entry.sourceId, offset, limit)
+            },
+    )
+
+private fun resolverFor(kind: QueueKind): QueueKindResolver = queueKindResolvers.getValue(kind)
+
 class QueueRepository(
     private val db: SubtracksDatabase,
 ) {
@@ -214,12 +412,6 @@ class QueueRepository(
 
     private val queueVersion = AtomicLong()
 
-    @Volatile
-    private var cachedFlatIds: List<String>? = null
-
-    @Volatile
-    private var cachedFlatVersion = -1L
-
     @Volatile
     private var shuffleRemoved: ShuffleState? = null
 
@@ -233,6 +425,9 @@ class QueueRepository(
     internal var offsetSeeks = 0L
         private set
 
+    internal var resolvedRowCount = 0L
+        private set
+
     private val cursorMutex = Mutex()
 
     fun playlistEntry(
@@ -295,8 +490,8 @@ class QueueRepository(
                     ?.takeIf { it.isNotBlank() }
             }
 
-            // An explicit song entry in the middle of a queue is a reordered context track, so
-            // label it by its album rather than losing the context name.
+            // A song entry can be a single or a track reordered out of a playlist, artist or
+            // genre, so label it by its album rather than losing the context name.
             QueueKind.Song -> {
                 library
                     .song(sourceId, refId)
@@ -386,7 +581,6 @@ class QueueRepository(
     }
 
     fun invalidateLibraryCache() {
-        cachedFlatIds = null
         lengthCache.clear()
         keyCache.clear()
         shuffleRemoved = null
@@ -407,8 +601,8 @@ class QueueRepository(
         snapshot: QueueSnapshot,
         songId: String,
     ): Long? {
-        val upIndex = idsFor(snapshot.upNext).indexOf(songId)
-        if (upIndex >= 0) return snapshot.anchorPlay + 1 + upIndex
+        val upIndex = flatIndexOf(snapshot.upNext, songId)
+        if (upIndex != null) return snapshot.anchorPlay + 1 + upIndex
         return combinedContextIndexOf(snapshot, songId)
     }
 
@@ -416,9 +610,8 @@ class QueueRepository(
         snapshot: QueueSnapshot,
         songId: String,
     ): Long? {
-        val flat = flatIds(snapshot).indexOf(songId)
-        if (flat < 0) return null
-        return snapshot.playContext(flat.toLong())?.let { snapshot.combined(it) }
+        val flat = flatIndexOf(snapshot.entries, songId) ?: return null
+        return snapshot.playContext(flat)?.let { snapshot.combined(it) }
     }
 
     suspend fun range(
@@ -581,9 +774,9 @@ class QueueRepository(
         val toUpNext = snapshot.isUpNext(to)
         if (fromUpNext && toUpNext) {
             val song = itemAt(snapshot, from) ?: return false
-            val sourceId = snapshot.locate(from)?.first?.sourceId ?: return false
+            val located = snapshot.locate(from) ?: return false
             val removed = removeEntry(snapshot.upNext, snapshot.upNextIndex(from))
-            val moved = ResolvedQueueEntry(songEntry(sourceId, song.song.id), 1L)
+            val moved = ResolvedQueueEntry(movedEntry(located.first, song.song.id, located.second), 1L)
             writeUpNext(compact(insertEntry(removed, snapshot.upNextIndex(to), moved)).map { it.entry })
             return true
         }
@@ -597,7 +790,7 @@ class QueueRepository(
         val located = snapshot.locateContext(playFrom) ?: return false
         val song = itemAt(snapshot, from) ?: return false
         val removed = removeEntry(snapshot.entries, playFrom)
-        val moved = ResolvedQueueEntry(songEntry(located.first.sourceId, song.song.id), 1L)
+        val moved = ResolvedQueueEntry(movedEntry(located.first, song.song.id, located.second), 1L)
         val insertAt = playTo.coerceIn(0, removed.sumOf { it.length })
         write(compact(insertEntry(removed, insertAt, moved)).map { it.entry })
         adjustAnchorOnMove(playFrom, insertAt)
@@ -631,7 +824,6 @@ class QueueRepository(
             }
         }
         queueVersion.incrementAndGet()
-        cachedFlatIds = null
     }
 
     private suspend fun writeUpNext(entries: List<QueueEntry>) {
@@ -648,34 +840,40 @@ class QueueRepository(
         queueVersion.incrementAndGet()
     }
 
-    private suspend fun flatIds(snapshot: QueueSnapshot): List<String> {
-        val cached = cachedFlatIds
-        if (cached != null && cachedFlatVersion == snapshot.version && cached.size.toLong() == snapshot.contextSize) return cached
-        val ids = idsFor(snapshot.entries)
-        cachedFlatIds = ids
-        cachedFlatVersion = snapshot.version
-        return ids
+    private suspend fun flatIndexOf(
+        entries: List<ResolvedQueueEntry>,
+        songId: String,
+    ): Long? {
+        var start = 0L
+        for (resolved in entries) {
+            val entry = resolved.entry
+            val rank = resolverFor(entry.kind).rank(dao, entry, songId)
+            if (rank != null && rank >= entry.offset && rank < entry.offset + resolved.length) {
+                return start + rank - entry.offset
+            }
+            val fallback = fallbackRank(entry, resolved.length, songId)
+            if (fallback != null) return start + fallback - entry.offset
+            start += resolved.length
+        }
+        return null
     }
 
-    private suspend fun idsFor(resolved: List<ResolvedQueueEntry>): List<String> {
-        val ids = ArrayList<String>()
-        for (entry in resolved) {
-            val ref = entry.entry
-            val entryIds =
-                when (ref.kind) {
-                    QueueKind.Song -> listOf(ref.refId)
-                    QueueKind.Album -> dao.albumSongIds(ref.sourceId, ref.refId)
-                    QueueKind.Playlist -> dao.playlistSongIds(ref.sourceId, ref.refId)
-                    QueueKind.Artist -> dao.artistSongIds(ref.sourceId, ref.refId)
-                    QueueKind.Genre -> dao.genreSongIds(ref.sourceId, ref.refId)
-                    QueueKind.Downloaded -> dao.downloadedSongIds(ref.sourceId)
-                    QueueKind.Starred -> dao.starredSongIds(ref.sourceId)
-                }
-            val from = ref.offset.toInt().coerceIn(0, entryIds.size)
-            val to = (ref.offset + entry.length).toInt().coerceIn(from, entryIds.size)
-            ids.addAll(entryIds.subList(from, to))
+    private suspend fun fallbackRank(
+        entry: QueueEntry,
+        length: Long,
+        songId: String,
+    ): Long? {
+        var offset = entry.offset
+        val end = entry.offset + length
+        while (offset < end) {
+            val limit = minOf(QUEUE_CHUNK.toLong(), end - offset).toInt()
+            val batch = rows(entry, offset, limit)
+            val index = batch.indexOfFirst { it.song.id == songId }
+            if (index >= 0) return offset + index
+            if (batch.size < limit) return null
+            offset += batch.size
         }
-        return ids
+        return null
     }
 
     private suspend fun contextPlayRange(
@@ -686,21 +884,11 @@ class QueueRepository(
         if (first > last) return emptyList()
         val items = mutableListOf<QueueWindowItem>()
         if (snapshot.shuffled) {
-            val sourceId =
-                snapshot.entries
-                    .firstOrNull()
-                    ?.entry
-                    ?.sourceId ?: return emptyList()
-            val ids = flatIds(snapshot)
-            val requested = mutableListOf<Pair<Long, String>>()
             for (play in first..last) {
-                val flat = snapshot.flatContext(play) ?: continue
-                val id = ids.getOrNull(flat.toInt()) ?: continue
-                requested += play to id
+                val located = snapshot.locateContext(play) ?: continue
+                val item = rows(located.first, located.first.offset + located.second, 1).firstOrNull() ?: continue
+                items += QueueWindowItem(snapshot.combined(play), item, playlistPosition = item.playlistPosition)
             }
-            if (requested.isEmpty()) return emptyList()
-            val byId = dao.songsByIds(sourceId, requested.map { it.second }.distinct()).associateBy { it.song.id }
-            requested.forEach { (play, id) -> byId[id]?.let { items += QueueWindowItem(snapshot.combined(play), it) } }
             return items
         }
         var start = 0L
@@ -755,27 +943,20 @@ class QueueRepository(
     ): List<SongItem> {
         if (entry.kind == QueueKind.Song) {
             offsetSeeks++
-            return dao.song(entry.sourceId, entry.refId, offset, limit)
+            return resolverFor(entry.kind).rows(dao, entry, offset, limit).also { resolvedRowCount += it.size }
         }
         val ref = QueueRef(entry.kind, entry.sourceId, entry.refId)
         val anchored = keyCache[ref]?.let { keyedRows(entry, offset, limit, it) }
         if (anchored != null) {
             keysetSeeks++
             if (anchored.isNotEmpty()) remember(ref, offset, anchored)
+            resolvedRowCount += anchored.size
             return anchored
         }
         offsetSeeks++
-        val fresh =
-            when (entry.kind) {
-                QueueKind.Playlist -> dao.playlistSongs(entry.sourceId, entry.refId, offset, limit)
-                QueueKind.Album -> dao.albumSongs(entry.sourceId, entry.refId, offset, limit)
-                QueueKind.Artist -> dao.artistSongs(entry.sourceId, entry.refId, offset, limit)
-                QueueKind.Genre -> dao.genreSongs(entry.sourceId, entry.refId, offset, limit)
-                QueueKind.Downloaded -> dao.downloadedSongs(entry.sourceId, offset, limit)
-                QueueKind.Starred -> dao.starredSongs(entry.sourceId, offset, limit)
-                QueueKind.Song -> emptyList()
-            }
+        val fresh = resolverFor(entry.kind).rows(dao, entry, offset, limit)
         if (fresh.isNotEmpty()) remember(ref, offset, fresh)
+        resolvedRowCount += fresh.size
         return fresh
     }
 
@@ -808,7 +989,7 @@ class QueueRepository(
         limit: Int,
         cursor: KeyCursor,
     ): List<SongItem>? {
-        if (!cursor.key.seekable(entry.kind)) return null
+        if (!resolverFor(entry.kind).supportsKeyset(cursor.key)) return null
         val from = cursor.ordinal
         // A backward seek from a far cursor is not cheaper than the offset query: the album
         // predicate is not sargable (it has to include NULL disc/track), so it scans the partition
@@ -834,43 +1015,14 @@ class QueueRepository(
         key: OrderKey,
         skip: Long,
         limit: Int,
-    ): List<SongItem> =
-        when (entry.kind) {
-            QueueKind.Playlist -> dao.playlistSongsFrom(entry.sourceId, entry.refId, key.position!!, skip, limit)
-            QueueKind.Album -> dao.albumSongsFrom(entry.sourceId, entry.refId, key.disc!!, key.track!!, key.id, skip, limit)
-            QueueKind.Artist -> emptyList()
-            QueueKind.Genre -> emptyList()
-            QueueKind.Downloaded -> emptyList()
-            QueueKind.Starred -> emptyList()
-            QueueKind.Song -> emptyList()
-        }
+    ): List<SongItem> = resolverFor(entry.kind).rowsFrom(dao, entry, key, skip, limit) ?: emptyList()
 
     private suspend fun rowsBefore(
         entry: QueueEntry,
         key: OrderKey,
         skip: Long,
         limit: Int,
-    ): List<SongItem> =
-        when (entry.kind) {
-            QueueKind.Playlist -> dao.playlistSongsBefore(entry.sourceId, entry.refId, key.position!!, skip, limit)
-            QueueKind.Album -> dao.albumSongsBefore(entry.sourceId, entry.refId, key.disc!!, key.track!!, key.id, skip, limit)
-            QueueKind.Artist -> emptyList()
-            QueueKind.Genre -> emptyList()
-            QueueKind.Downloaded -> emptyList()
-            QueueKind.Starred -> emptyList()
-            QueueKind.Song -> emptyList()
-        }
-
-    private fun OrderKey.seekable(kind: QueueKind): Boolean =
-        when (kind) {
-            QueueKind.Playlist -> position != null
-            QueueKind.Album -> disc != null && track != null
-            QueueKind.Artist -> false
-            QueueKind.Genre -> false
-            QueueKind.Downloaded -> false
-            QueueKind.Starred -> false
-            QueueKind.Song -> false
-        }
+    ): List<SongItem> = resolverFor(entry.kind).rowsBefore(dao, entry, key, skip, limit) ?: emptyList()
 
     private suspend fun lengthOf(
         entry: QueueEntry,
@@ -895,40 +1047,23 @@ class QueueRepository(
         )
 
     private suspend fun QueueEntry.resolvedLength(): Long {
-        val total =
-            when (kind) {
-                QueueKind.Song -> {
-                    dao.songLength(sourceId, refId)
-                }
-
-                QueueKind.Playlist -> {
-                    dao.playlistLength(sourceId, refId)
-                }
-
-                QueueKind.Album -> {
-                    dao.albumLength(sourceId, refId)
-                }
-
-                QueueKind.Artist -> {
-                    dao.artistLength(sourceId, refId)
-                }
-
-                QueueKind.Genre -> {
-                    dao.genreLength(sourceId, refId)
-                }
-
-                QueueKind.Downloaded -> {
-                    dao.downloadedLength(sourceId)
-                }
-
-                QueueKind.Starred -> {
-                    dao.starredLength(sourceId)
-                }
-            }
+        val total = resolverFor(kind).length(dao, this)
         val available = (total - offset).coerceAtLeast(0)
         return count?.coerceAtMost(available) ?: available
     }
 
+    private fun movedEntry(
+        source: QueueEntry,
+        songId: String,
+        offsetInEntry: Long,
+    ): QueueEntry =
+        if (source.kind == QueueKind.Album) {
+            val offset = source.offset + offsetInEntry
+            source.range(offset, offset)
+        } else {
+            songEntry(source.sourceId, songId)
+        }
+
     private fun QueueEntry.range(
         start: Long,
         end: Long,

app/src/main/kotlin/com/subtracks/data/repo/SourceRepository.kt

@@ -9,6 +9,7 @@ import com.subtracks.data.model.CoverArtRef
 import com.subtracks.data.model.Source
 import com.subtracks.data.model.SubsonicConfig
 import com.subtracks.data.model.SubsonicSource
+import com.subtracks.data.model.artistImageKey
 import com.subtracks.data.model.coverArtKey
 import com.subtracks.data.net.NetworkMode
 import com.subtracks.data.prefs.StreamQuality
@@ -69,6 +70,9 @@ class SourceRepository(
     private val _offline = MutableStateFlow(false)
     val offline: StateFlow<Boolean> = _offline
 
+    private val _activeSource = MutableStateFlow<Long?>(null)
+    val activeSource: StateFlow<Long?> = _activeSource
+
     fun downloadsAllowedOverMetered(): Boolean = allowMeteredDownloads
 
     fun setOfflineMode(enabled: Boolean) {
@@ -109,6 +113,7 @@ class SourceRepository(
                     Log.i("net", "active source -> ${config?.name ?: "none"}")
                 }
                 active = config?.let { ActiveSource(it.id, it.toMusicSource(quality, concurrency)) }
+                _activeSource.value = config?.id
                 _quality.value = quality
                 if (sourceChanged && config != null && config.useTokenAuth && !_offline.value) {
                     scope.launch {
@@ -143,6 +148,18 @@ class SourceRepository(
         return CoverArtRef(url = url, cacheKey = cacheKey)
     }
 
+    fun artistImage(
+        artistId: String,
+        url: String?,
+    ): CoverArtRef? {
+        val current = active ?: return null
+        if (url.isNullOrBlank()) return null
+        val cacheKey = artistImageKey(current.id, artistId)
+        artworkStore.uri(current.id, cacheKey)?.let { return CoverArtRef(url = it, cacheKey = cacheKey) }
+        if (_offline.value) return null
+        return CoverArtRef(url = url, cacheKey = cacheKey)
+    }
+
     fun networkCoverArt(
         sourceId: Long,
         coverArt: String,
@@ -220,8 +237,8 @@ class SourceRepository(
         useTokenAuth: Boolean,
     ) {
         val dao = db.sourcesDao()
-        val source = dao.sourceOnce(id) ?: return
-        dao.upsertSource(source.copy(name = name.trim(), address = normalizeAddress(address)))
+        if (dao.sourceOnce(id) == null) return
+        dao.updateSourceDetails(id, name.trim(), normalizeAddress(address))
         dao.upsertSubsonicSource(
             SubsonicSource(
                 sourceId = id,
@@ -261,6 +278,15 @@ class SourceRepository(
         return config.toMusicSource(quality.value, prefs.syncConcurrency().first())
     }
 
+    suspend fun artistBiography(
+        sourceId: Long,
+        artistId: String,
+    ): String? {
+        check(!_offline.value) { "Offline mode is on" }
+        val config = db.sourcesDao().subsonicConfigOnce(sourceId) ?: error("No configured source")
+        return config.toMusicSource(quality.value, prefs.syncConcurrency().first()).artistBiography(artistId)
+    }
+
     private fun SubsonicConfig.toClient(): SubsonicClient =
         client(
             address = address,

app/src/main/kotlin/com/subtracks/data/source/MusicSource.kt

@@ -26,6 +26,8 @@ interface MusicSource {
         time: Long? = null,
     )
 
+    suspend fun artistBiography(artistId: String): String? = null
+
     fun artists(): Flow<List<Artist>>
 
     fun albums(): Flow<List<Album>>

app/src/main/kotlin/com/subtracks/data/source/subsonic/SubsonicClient.kt

@@ -8,6 +8,7 @@ import okhttp3.OkHttpClient
 import okhttp3.Request
 import java.io.InputStream
 import java.security.MessageDigest
+import java.util.concurrent.TimeUnit
 
 open class SubsonicException(
     val code: Int,
@@ -55,11 +56,12 @@ class SubsonicClient(
     fun <T> stream(
         method: String,
         params: Map<String, String> = emptyMap(),
+        timeoutMs: Long? = null,
         body: (InputStream) -> T,
     ): T {
         val usedTokenAuth = useTokenAuth
         return try {
-            execute(method, params, body)
+            execute(method, params, timeoutMs, body)
         } catch (failure: SubsonicException) {
             if (failure.code !in TOKEN_AUTH_UNSUPPORTED_CODES || !usedTokenAuth) {
                 Log.w("http", "$method failed: server code ${failure.code} \"${failure.message}\"")
@@ -67,13 +69,14 @@ class SubsonicClient(
             }
             Log.w("http", "$method: token auth unsupported (server code ${failure.code}), retrying with plaintext")
             disableTokenAuth()
-            execute(method, params, body)
+            execute(method, params, timeoutMs, body)
         }
     }
 
     private fun <T> execute(
         method: String,
         params: Map<String, String>,
+        timeoutMs: Long?,
         body: (InputStream) -> T,
     ): T {
         val request =
@@ -81,7 +84,9 @@ class SubsonicClient(
                 .Builder()
                 .url(uri(method, params))
                 .build()
-        http.newCall(request).execute().use { response ->
+        val call = http.newCall(request)
+        timeoutMs?.let { call.timeout().timeout(it, TimeUnit.MILLISECONDS) }
+        call.execute().use { response ->
             if (!response.isSuccessful) {
                 throw SubsonicException(-1, "HTTP ${response.code}", UiMessage(R.string.error_http, listOf(response.code)))
             }

app/src/main/kotlin/com/subtracks/data/source/subsonic/SubsonicSource.kt

@@ -85,6 +85,13 @@ class SubsonicSource(
         }
     }
 
+    override suspend fun artistBiography(artistId: String): String? =
+        withContext(Dispatchers.IO) {
+            client.stream("getArtistInfo2", mapOf("id" to artistId), timeoutMs = ARTIST_BIO_TIMEOUT_MS) { input ->
+                SubsonicXml.artistBiography(input)
+            }
+        }
+
     override fun artists(): Flow<List<Artist>> =
         entityBatches(
             method = "getArtists",
@@ -103,7 +110,7 @@ class SubsonicSource(
                     params = page("newest", offset),
                     tag = "album",
                     create = { SubsonicXml.albumDraft(id, it) },
-                    onChild = { draft, name, attrs -> if (name == "discTitles") draft.addDiscTitle(attrs) },
+                    onChild = SubsonicXml::albumChild,
                 ).collect { batch ->
                     raw += batch.size
                     val accepted = batch.filter { it.id.isNotEmpty() }
@@ -323,7 +330,7 @@ class SubsonicSource(
         params: Map<String, String> = emptyMap(),
         tag: String,
         create: (Attributes) -> T,
-        onChild: (T, String, Attributes) -> Unit = { _, _, _ -> },
+        onChild: (T, String, Attributes, Int) -> Unit = { _, _, _, _ -> },
     ): Flow<List<T>> =
         channelFlow {
             val buffer = ArrayList<T>(PAGE_SIZE)
@@ -365,6 +372,7 @@ class SubsonicSource(
         const val PAGE_SIZE = 500
         const val MAX_PAGES = 20_000
         const val THUMBNAIL_SIZE = 384
+        const val ARTIST_BIO_TIMEOUT_MS = 15_000L
     }
 }
 

app/src/main/kotlin/com/subtracks/data/source/subsonic/SubsonicXml.kt

@@ -4,6 +4,7 @@ import com.subtracks.R
 import com.subtracks.UiMessage
 import com.subtracks.data.model.Album
 import com.subtracks.data.model.Artist
+import com.subtracks.data.model.ArtistRef
 import com.subtracks.data.model.Playlist
 import com.subtracks.data.model.PlaylistSong
 import com.subtracks.data.model.Song
@@ -31,6 +32,8 @@ object SubsonicXml {
             albumCount = attrs.longAttr("albumCount") ?: 0L,
             starred = attrs.dateAttr("starred"),
             coverArt = attrs.attr("coverArt").ifEmpty { null },
+            artistImageUrl = attrs.attr("artistImageUrl").ifEmpty { null },
+            sortName = attrs.attr("sortName").takeIf { it.isNotBlank() } ?: attrs.attr("name"),
         )
 
     internal fun albumDraft(
@@ -43,6 +46,8 @@ object SubsonicXml {
             artistId = attrs.attr("artistId").ifEmpty { null },
             name = attrs.attr("name"),
             albumArtist = attrs.attr("artist").ifEmpty { null },
+            displayArtist = attrs.attr("displayArtist").ifEmpty { null },
+            sortName = attrs.attr("sortName").ifEmpty { null },
             created = attrs.dateAttr("created") ?: 0L,
             coverArt = attrs.attr("coverArt").ifEmpty { null },
             genre = attrs.attr("genre").ifEmpty { null },
@@ -68,6 +73,8 @@ object SubsonicXml {
             title = attrs.attr("title"),
             album = attrs.attr("album").ifEmpty { null },
             artist = attrs.attr("artist").ifEmpty { null },
+            displayArtist = attrs.attr("displayArtist").ifEmpty { null },
+            sortName = attrs.attr("sortName").ifEmpty { null },
             duration = attrs.longAttr("duration"),
             track = attrs.longAttr("track"),
             disc = attrs.longAttr("discNumber"),
@@ -82,10 +89,29 @@ object SubsonicXml {
         entity: SongDraft,
         name: String,
         attrs: Attributes,
+        level: Int,
     ) {
         when (name) {
-            "genres" -> entity.addGenre(attrs)
-            "replayGain" -> entity.addReplayGain(attrs)
+            "genres" -> if (level == 1) entity.addGenre(attrs)
+            "replayGain" -> if (level == 1) entity.addReplayGain(attrs)
+            "artists" -> if (level == 1) entity.addArtists(attrs)
+            "albumArtists" -> entity.clearNestedArtists()
+            "artist" -> if (level == 2) entity.addNestedArtist(attrs)
+            else -> if (level == 1) entity.clearNestedArtists()
+        }
+    }
+
+    internal fun albumChild(
+        entity: AlbumDraft,
+        name: String,
+        attrs: Attributes,
+        level: Int,
+    ) {
+        when (name) {
+            "discTitles" -> if (level == 1) entity.addDiscTitle(attrs)
+            "artists" -> if (level == 1) entity.addArtists(attrs)
+            "artist" -> if (level == 2) entity.addNestedArtist(attrs)
+            else -> if (level == 1) entity.clearArtists()
         }
     }
 
@@ -103,6 +129,8 @@ object SubsonicXml {
             created = attrs.dateAttr("created") ?: 0L,
             changed = attrs.dateAttr("changed") ?: 0L,
             duration = attrs.longAttr("duration") ?: 0L,
+            owner = attrs.attr("owner").ifEmpty { null },
+            shared = attrs.boolAttr("public"),
         )
 
     internal fun playlistSong(
@@ -126,7 +154,7 @@ object SubsonicXml {
         input: InputStream,
         entityTag: String,
         create: (Attributes) -> T,
-        onChild: (T, String, Attributes) -> Unit = { _, _, _ -> },
+        onChild: (T, String, Attributes, Int) -> Unit = { _, _, _, _ -> },
         onEnd: (T) -> Unit,
     ) {
         parse(input, EntityHandler(entityTag, create, onChild, onEnd, stopAfterFirst = false))
@@ -136,10 +164,16 @@ object SubsonicXml {
         input: InputStream,
         entityTag: String,
     ): Boolean {
-        val handler = EntityHandler(entityTag, { Unit }, { _, _, _ -> }, { }, stopAfterFirst = true)
+        val handler = EntityHandler(entityTag, { Unit }, { _, _, _, _ -> }, { }, stopAfterFirst = true)
         parse(input, handler)
         return handler.found
     }
+
+    internal fun artistBiography(input: InputStream): String? {
+        val handler = ArtistBiographyHandler()
+        parse(input, handler)
+        return handler.biography
+    }
 }
 
 internal class AlbumDraft(
@@ -148,6 +182,8 @@ internal class AlbumDraft(
     var artistId: String? = null,
     var name: String = "",
     var albumArtist: String? = null,
+    var displayArtist: String? = null,
+    var sortName: String? = null,
     var created: Long = 0L,
     var coverArt: String? = null,
     var genre: String? = null,
@@ -156,19 +192,41 @@ internal class AlbumDraft(
     var songCount: Long = 0L,
     val discTitles: MutableMap<Long, String> = mutableMapOf(),
 ) {
+    private val artists = mutableListOf<ArtistRef>()
+    private var artistContainer = false
+
     fun addDiscTitle(attrs: Attributes) {
         val disc = attrs.longAttr("disc") ?: return
         val title = attrs.attr("title").takeIf { it.isNotBlank() } ?: return
         discTitles[disc] = title
     }
 
-    fun toAlbum(): Album =
-        Album(
+    fun addArtists(attrs: Attributes) {
+        val ref = attrs.artistRef()
+        if (ref == null) {
+            artistContainer = true
+        } else {
+            artists += ref
+            artistContainer = false
+        }
+    }
+
+    fun addNestedArtist(attrs: Attributes) {
+        if (artistContainer) attrs.artistRef()?.let { artists += it }
+    }
+
+    fun clearArtists() {
+        artistContainer = false
+    }
+
+    fun toAlbum(): Album {
+        val refs = artistFallback(artists, artistId, albumArtist)
+        return Album(
             sourceId = sourceId,
             id = id,
             artistId = artistId,
             name = name,
-            albumArtist = albumArtist,
+            albumArtist = displayName(albumArtist, displayArtist, refs),
             created = created,
             coverArt = coverArt,
             genre = genre,
@@ -176,7 +234,10 @@ internal class AlbumDraft(
             starred = starred,
             songCount = songCount,
             discTitles = discTitles.toMap(),
+            artists = refs,
+            sortName = sortName?.takeIf { it.isNotBlank() } ?: name,
         )
+    }
 }
 
 internal class SongDraft(
@@ -187,6 +248,8 @@ internal class SongDraft(
     private val title: String = "",
     private val album: String? = null,
     private val artist: String? = null,
+    private val displayArtist: String? = null,
+    private val sortName: String? = null,
     private val duration: Long? = null,
     private val track: Long? = null,
     private val disc: Long? = null,
@@ -201,6 +264,9 @@ internal class SongDraft(
     private var albumPeak: Float? = null,
     private val genres: MutableList<String> = mutableListOf(),
 ) {
+    private val artists = mutableListOf<ArtistRef>()
+    private var nestedArtists: MutableList<ArtistRef>? = null
+
     fun addGenre(attrs: Attributes) {
         attrs
             .attr("name")
@@ -216,15 +282,34 @@ internal class SongDraft(
         attrs.floatAttr("albumPeak")?.let { albumPeak = it }
     }
 
-    fun toSong(): Song =
-        Song(
+    fun addArtists(attrs: Attributes) {
+        val ref = attrs.artistRef()
+        if (ref == null) {
+            nestedArtists = artists
+        } else {
+            artists += ref
+            nestedArtists = null
+        }
+    }
+
+    fun clearNestedArtists() {
+        nestedArtists = null
+    }
+
+    fun addNestedArtist(attrs: Attributes) {
+        nestedArtists?.let { list -> attrs.artistRef()?.let { list += it } }
+    }
+
+    fun toSong(): Song {
+        val refs = artistFallback(artists, artistId, artist)
+        return Song(
             sourceId = sourceId,
             id = id,
             albumId = albumId,
             artistId = artistId,
             title = title,
             album = album,
-            artist = artist,
+            artist = displayName(artist, displayArtist, refs),
             duration = duration,
             track = track,
             disc = disc,
@@ -238,13 +323,52 @@ internal class SongDraft(
             trackPeak = trackPeak,
             albumPeak = albumPeak,
             genres = genres.toList(),
+            artists = refs,
+            sortName = sortName?.takeIf { it.isNotBlank() } ?: title,
         )
+    }
 }
 
+private fun Attributes.artistRef(): ArtistRef? {
+    val id = attr("id")
+    val name = attr("name")
+    if (id.isEmpty() && name.isEmpty()) return null
+    return ArtistRef(id, name)
+}
+
+private fun artistFallback(
+    parsed: List<ArtistRef>,
+    artistId: String?,
+    name: String?,
+): List<ArtistRef> {
+    val refs = parsed.filter { it.id.isNotBlank() }.distinctBy { it.id }
+    if (refs.isNotEmpty()) return refs
+    if (artistId.isNullOrBlank()) return emptyList()
+    return listOf(ArtistRef(artistId, name.orEmpty()))
+}
+
+private const val ARTIST_JOINER = " • "
+
+private fun displayName(
+    legacy: String?,
+    openSubsonic: String?,
+    refs: List<ArtistRef>,
+): String? =
+    legacy?.takeIf { it.isNotBlank() }
+        ?: openSubsonic?.takeIf { it.isNotBlank() }
+        ?: refs
+            .map { it.name }
+            .filter { it.isNotBlank() }
+            .distinct()
+            .joinToString(ARTIST_JOINER)
+            .takeIf { it.isNotEmpty() }
+
 internal fun Attributes.attr(name: String): String = getValue(name) ?: ""
 
 internal fun Attributes.longAttr(name: String): Long? = attr(name).takeIf { it.isNotEmpty() }?.toLongOrNull()
 
+internal fun Attributes.boolAttr(name: String): Boolean = attr(name).let { it == "1" || it.equals("true", ignoreCase = true) }
+
 internal fun Attributes.floatAttr(name: String): Float? = attr(name).takeIf { it.isNotEmpty() }?.toFloatOrNull()?.takeIf { it.isFinite() }
 
 internal fun Attributes.dateAttr(name: String): Long? = attr(name).takeIf { it.isNotEmpty() }?.let(IsoDate::parse)
@@ -308,10 +432,44 @@ private open class SubsonicResponseHandler : DefaultHandler() {
     ) = Unit
 }
 
+private class ArtistBiographyHandler : SubsonicResponseHandler() {
+    private var biographyDepth = -1
+    private val text = StringBuilder()
+
+    var biography: String? = null
+        private set
+
+    override fun characters(
+        ch: CharArray,
+        start: Int,
+        length: Int,
+    ) {
+        if (biographyDepth >= 0) text.append(ch, start, length)
+    }
+
+    override fun onElementStart(
+        name: String,
+        attributes: Attributes,
+        depth: Int,
+    ) {
+        if (name == "biography" && biographyDepth < 0) biographyDepth = depth
+    }
+
+    override fun onElementEnd(
+        name: String,
+        depth: Int,
+    ) {
+        if (name == "biography" && depth == biographyDepth) {
+            biography = text.toString().trim().takeIf { it.isNotEmpty() }
+            biographyDepth = -1
+        }
+    }
+}
+
 private class EntityHandler<T>(
     private val entityTag: String,
     private val create: (Attributes) -> T,
-    private val onChild: (T, String, Attributes) -> Unit,
+    private val onChild: (T, String, Attributes, Int) -> Unit,
     private val onEnd: (T) -> Unit,
     private val stopAfterFirst: Boolean,
 ) : SubsonicResponseHandler() {
@@ -332,8 +490,8 @@ private class EntityHandler<T>(
                 current = create(attributes)
                 entityDepth = depth
             }
-        } else if (depth == entityDepth + 1) {
-            onChild(active, name, attributes)
+        } else if (depth > entityDepth) {
+            onChild(active, name, attributes, depth - entityDepth)
         }
     }
 

app/src/main/kotlin/com/subtracks/data/sync/SyncService.kt

@@ -6,12 +6,16 @@ import androidx.room3.useWriterConnection
 import androidx.sqlite.SQLiteStatement
 import com.subtracks.data.db.SubtracksDatabase
 import com.subtracks.data.model.Album
+import com.subtracks.data.model.AlbumArtistRef
 import com.subtracks.data.model.Artist
+import com.subtracks.data.model.ArtistRef
+import com.subtracks.data.model.ArtistRefsCodec
 import com.subtracks.data.model.Disc
 import com.subtracks.data.model.DiscKey
 import com.subtracks.data.model.Playlist
 import com.subtracks.data.model.PlaylistSong
 import com.subtracks.data.model.Song
+import com.subtracks.data.model.SongArtistRef
 import com.subtracks.data.model.SongGenre
 import com.subtracks.data.source.MusicSource
 import java.util.Arrays
@@ -28,10 +32,16 @@ class SyncService(
     private var pruned = 0
 
     suspend fun sync(): SyncSummary {
-        syncArtists()
-        syncAlbums()
-        syncSongs()
-        aggregatePlayData()
+        val sources = db.sourcesDao()
+        val wasStale = sources.creditsStale(source.id) ?: true
+        val artistsChanged = syncArtists()
+        val albumsChanged = syncAlbums()
+        val songsChanged = syncSongs()
+        optimize()
+        if (artistsChanged || albumsChanged || songsChanged || wasStale) {
+            recomputeAggregates()
+            sources.setCreditsStale(source.id, false)
+        }
         syncPlaylists()
         syncPlaylistSongs()
         return SyncSummary(
@@ -44,61 +54,90 @@ class SyncService(
         )
     }
 
-    private suspend fun syncArtists() {
+    private suspend fun syncArtists(): Boolean {
         val library = db.libraryDao()
         val seen = HashedIds()
+        var changed = false
         source.artists().collect { batch ->
             if (batch.isEmpty()) return@collect
-            write("artists", artistColumns, primaryKey, batch) { it.values() }
+            changed =
+                write("artists", primaryKey, batch, preserved = setOf("albumCount"), markStale = true) { it.columns() } ||
+                changed
             batch.forEach { seen.add(idHash(it.id)) }
             artistsSynced += batch.size
         }
+        val prunedBefore = pruned
         pruned += pruneStaleIds(seen, { library.artistIdsAfter(source.id, it, PRUNE_PAGE) }, { library.deleteArtists(source.id, it) })
+        return changed || pruned > prunedBefore
     }
 
-    private suspend fun syncAlbums() {
+    private suspend fun syncAlbums(): Boolean {
         val library = db.libraryDao()
         val seenAlbums = HashedIds()
         val seenDiscs = HashedIds()
+        var changed = false
         source.albums().collect { batch ->
             if (batch.isEmpty()) return@collect
             val discs =
                 batch.flatMap { album ->
                     album.discTitles.map { (disc, title) -> Disc(album.sourceId, album.id, disc, title) }
                 }
-            writeAlbumsAndDiscs(batch, discs)
+            changed = writeAlbumsAndDiscs(batch, discs) || changed
             batch.forEach { seenAlbums.add(idHash(it.id)) }
             discs.forEach { seenDiscs.add(discHash(it.albumId, it.disc)) }
             albumsSynced += batch.size
         }
-        pruned += pruneStaleIds(seenAlbums, { library.albumIdsAfter(source.id, it, PRUNE_PAGE) }, { library.deleteAlbums(source.id, it) })
+        val prunedBefore = pruned
+        pruned +=
+            pruneStaleIds(
+                seenAlbums,
+                { library.albumIdsAfter(source.id, it, PRUNE_PAGE) },
+                { library.deleteAlbums(source.id, it) },
+                markStale = { db.sourcesDao().setCreditsStale(source.id, true) },
+            )
         pruned +=
             pruneStaleDiscs(seenDiscs, { albumId, disc -> library.discKeysAfter(source.id, albumId, disc, PRUNE_PAGE) }) {
                 deleteStaleDiscs(it)
             }
+        return changed || pruned > prunedBefore
     }
 
-    private suspend fun syncSongs() {
+    private suspend fun syncSongs(): Boolean {
         val library = db.libraryDao()
         val seen = HashedIds()
+        var changed = false
         source.songs().collect { batch ->
             if (batch.isEmpty()) return@collect
-            writeSongs(batch)
+            changed = writeSongs(batch) || changed
             batch.forEach { seen.add(idHash(it.id)) }
             songsSynced += batch.size
         }
-        pruned += pruneStaleIds(seen, { library.songIdsAfter(source.id, it, PRUNE_PAGE) }, { library.deleteSongs(source.id, it) })
+        val prunedBefore = pruned
+        pruned +=
+            pruneStaleIds(
+                seen,
+                { library.songIdsAfter(source.id, it, PRUNE_PAGE) },
+                { library.deleteSongs(source.id, it) },
+                markStale = { db.sourcesDao().setCreditsStale(source.id, true) },
+            )
+        return changed || pruned > prunedBefore
     }
 
-    private suspend fun writeSongs(batch: List<Song>) {
+    private suspend fun writeSongs(batch: List<Song>): Boolean {
         val names = batch.associate { it.id to it.genreNames() }
         val genres =
             batch.flatMap { song ->
                 names.getValue(song.id).mapIndexed { index, genre -> SongGenre(song.sourceId, song.id, index.toLong(), genre) }
             }
-        db.useWriterConnection { connection ->
+        val artists =
+            batch.flatMap { song ->
+                song.artistPositions().map { (position, ref) -> SongArtistRef(song.sourceId, song.id, position, ref.id, ref.name) }
+            }
+        return db.useWriterConnection { connection ->
             connection.immediateTransaction {
-                connection.upsertChanged("songs", songColumns, primaryKey, batch) { it.values() }
+                val before = connection.totalChanges()
+                val resolved = connection.resolveSongSortNames(batch)
+                connection.upsertChanged("songs", primaryKey, resolved) { it.columns() }
                 connection.usePrepared("DELETE FROM song_genres WHERE sourceId = ? AND songId = ? AND position >= ?") { statement ->
                     batch.forEach { song ->
                         statement.bind(1, song.sourceId)
@@ -109,13 +148,107 @@ class SyncService(
                         statement.clearBindings()
                     }
                 }
-                connection.upsertChanged("song_genres", songGenreColumns, songGenreKey, genres) { it.values() }
+                connection.upsertChanged("song_genres", songGenreKey, genres) { it.columns() }
+                connection.usePrepared("DELETE FROM song_artists WHERE sourceId = ? AND songId = ? AND position >= ?") { statement ->
+                    batch.forEach { song ->
+                        statement.bind(1, song.sourceId)
+                        statement.bind(2, song.id)
+                        statement.bind(3, song.artistPositions().size.toLong())
+                        statement.step()
+                        statement.reset()
+                        statement.clearBindings()
+                    }
+                }
+                connection.upsertChanged("song_artists", songArtistKey, artists) { it.columns() }
+                (connection.totalChanges() != before).also { changed ->
+                    if (changed) connection.markCreditsStale(batch.first().sourceId)
+                }
             }
         }
     }
 
-    private suspend fun aggregatePlayData() {
-        db.libraryDao().recomputePlayData(source.id)
+    private suspend fun recomputeAggregates() {
+        db.libraryDao().recomputeAggregates(source.id)
+    }
+
+    private suspend fun PooledConnection.totalChanges(): Long {
+        var value = 0L
+        usePrepared("SELECT total_changes()") { statement ->
+            statement.step()
+            value = statement.getLong(0)
+        }
+        return value
+    }
+
+    private suspend fun PooledConnection.markCreditsStale(sourceId: Long) {
+        usePrepared("UPDATE sources SET creditsStale = 1 WHERE id = ? AND creditsStale = 0") { statement ->
+            statement.bindLong(1, sourceId)
+            statement.step()
+        }
+    }
+
+    private suspend fun PooledConnection.resolveSongSortNames(batch: List<Song>): List<Song> {
+        if (batch.isEmpty()) return batch
+        val sortNames =
+            artistSortNames(
+                batch.first().sourceId,
+                batch
+                    .flatMap { listOfNotNull(it.artistId) + it.artistRefs.map { ref -> ref.id } }
+                    .filter { it.isNotBlank() }
+                    .toSet(),
+            )
+        return batch.map { song ->
+            val primary = song.artistId ?: song.artists.firstOrNull()?.id
+            val sortName =
+                primary?.let(sortNames::get)?.takeIf { it.isNotBlank() }
+                    ?: song.artists.firstNotNullOfOrNull { ref -> sortNames[ref.id]?.takeIf { it.isNotBlank() } }
+                    ?: song.artistSort
+            if (sortName == song.artistSort) song else song.copy(artistSort = sortName)
+        }
+    }
+
+    private suspend fun PooledConnection.resolveAlbumSortNames(batch: List<Album>): List<Album> {
+        if (batch.isEmpty()) return batch
+        val sortNames =
+            artistSortNames(
+                batch.first().sourceId,
+                batch
+                    .flatMap { listOfNotNull(it.artistId) + it.artistRefs.map { ref -> ref.id } }
+                    .filter { it.isNotBlank() }
+                    .toSet(),
+            )
+        return batch.map { album ->
+            val primary = album.artistId ?: album.artists.firstOrNull()?.id
+            val sortName =
+                primary?.let(sortNames::get)?.takeIf { it.isNotBlank() }
+                    ?: album.artists.firstNotNullOfOrNull { ref -> sortNames[ref.id]?.takeIf { it.isNotBlank() } }
+                    ?: album.albumArtistSort
+            if (sortName == album.albumArtistSort) album else album.copy(albumArtistSort = sortName)
+        }
+    }
+
+    private suspend fun PooledConnection.artistSortNames(
+        sourceId: Long,
+        ids: Collection<String>,
+    ): Map<String, String> {
+        if (ids.isEmpty()) return emptyMap()
+        val sortNames = HashMap<String, String>(ids.size)
+        ids.toList().chunked(SQL_VARIABLES).forEach { chunk ->
+            val placeholders = chunk.joinToString(",") { "?" }
+            usePrepared("SELECT id, sortName FROM artists WHERE sourceId = ? AND id IN ($placeholders)") { statement ->
+                statement.bindLong(1, sourceId)
+                chunk.forEachIndexed { index, id -> statement.bindText(index + 2, id) }
+                while (statement.step()) sortNames[statement.getText(0)] = statement.getText(1)
+            }
+        }
+        return sortNames
+    }
+
+    // Without sqlite_stat1 the artist and relation queries can fall back to whole-table scans.
+    private suspend fun optimize() {
+        db.useWriterConnection { connection ->
+            connection.usePrepared("PRAGMA optimize") { it.step() }
+        }
     }
 
     private suspend fun syncPlaylists() {
@@ -123,7 +256,7 @@ class SyncService(
         val seen = HashedIds()
         source.playlists().collect { batch ->
             if (batch.isEmpty()) return@collect
-            write("playlists", playlistColumns, primaryKey, batch) { it.values() }
+            write("playlists", primaryKey, batch) { it.columns() }
             batch.forEach { seen.add(idHash(it.id)) }
             playlistsSynced += batch.size
         }
@@ -136,7 +269,7 @@ class SyncService(
         val counts = HashMap<String, Long>()
         source.playlistSongs(playlistIds).collect { batch ->
             if (batch.isEmpty()) return@collect
-            write("playlist_songs", playlistSongColumns, playlistSongKey, batch) { it.values() }
+            write("playlist_songs", playlistSongKey, batch) { it.columns() }
             batch.forEach { counts[it.playlistId] = (counts[it.playlistId] ?: 0L) + 1L }
             playlistSongsSynced += batch.size
         }
@@ -147,26 +280,50 @@ class SyncService(
     // One commit per batch, so Room notifies paged observers once per batch rather than per row.
     private suspend fun <T> write(
         table: String,
-        columns: List<String>,
         key: List<String>,
         rows: List<T>,
-        values: (T) -> List<Any?>,
-    ) {
+        preserved: Set<String> = emptySet(),
+        markStale: Boolean = false,
+        columns: (T) -> List<Pair<String, Any?>>,
+    ): Boolean =
         db.useWriterConnection { connection ->
             connection.immediateTransaction {
-                connection.upsertChanged(table, columns, key, rows, values)
+                val before = connection.totalChanges()
+                connection.upsertChanged(table, key, rows, preserved, columns)
+                (connection.totalChanges() != before).also { changed ->
+                    if (changed && markStale) connection.markCreditsStale(source.id)
+                }
             }
         }
-    }
 
     private suspend fun writeAlbumsAndDiscs(
         albums: List<Album>,
         discs: List<Disc>,
-    ) {
-        db.useWriterConnection { connection ->
+    ): Boolean {
+        val artists =
+            albums.flatMap { album ->
+                album.artistPositions().map { (position, ref) -> AlbumArtistRef(album.sourceId, album.id, position, ref.id, ref.name) }
+            }
+        return db.useWriterConnection { connection ->
             connection.immediateTransaction {
-                connection.upsertChanged("albums", albumColumns, primaryKey, albums) { it.values() }
-                connection.upsertChanged("discs", discColumns, discKey, discs) { it.values() }
+                val before = connection.totalChanges()
+                val resolved = connection.resolveAlbumSortNames(albums)
+                connection.upsertChanged("albums", primaryKey, resolved) { it.columns() }
+                connection.upsertChanged("discs", discKey, discs) { it.columns() }
+                connection.usePrepared("DELETE FROM album_artists WHERE sourceId = ? AND albumId = ? AND position >= ?") { statement ->
+                    albums.forEach { album ->
+                        statement.bind(1, album.sourceId)
+                        statement.bind(2, album.id)
+                        statement.bind(3, album.artistPositions().size.toLong())
+                        statement.step()
+                        statement.reset()
+                        statement.clearBindings()
+                    }
+                }
+                connection.upsertChanged("album_artists", albumArtistKey, artists) { it.columns() }
+                (connection.totalChanges() != before).also { changed ->
+                    if (changed) connection.markCreditsStale(albums.first().sourceId)
+                }
             }
         }
     }
@@ -194,6 +351,7 @@ class SyncService(
         seen: HashedIds,
         pageOf: suspend (afterId: String) -> List<String>,
         delete: suspend (Collection<String>) -> Unit,
+        markStale: (suspend () -> Unit)? = null,
     ): Int {
         seen.freeze()
         var afterId = ""
@@ -202,6 +360,7 @@ class SyncService(
             val ids = pageOf(afterId)
             if (ids.isEmpty()) return pruned
             val stale = ids.filterNot { seen.contains(idHash(it)) }
+            if (stale.isNotEmpty()) markStale?.invoke()
             stale.chunked(DELETE_CHUNK).forEach { delete(it) }
             pruned += stale.size
             if (ids.size < PRUNE_PAGE) return pruned
@@ -241,6 +400,7 @@ data class SyncSummary(
 )
 
 private const val DELETE_CHUNK = 500
+private const val SQL_VARIABLES = 500
 private const val PRUNE_PAGE = 500
 private const val INITIAL_HASH_CAPACITY = 256
 private const val FNV_OFFSET = -3750763034362895579L
@@ -277,51 +437,8 @@ private fun discHash(
 
 private val primaryKey = listOf("sourceId", "id")
 
-private val artistColumns = listOf("sourceId", "id", "name", "albumCount", "starred", "coverArt")
-
-private val albumColumns =
-    listOf(
-        "sourceId",
-        "id",
-        "artistId",
-        "name",
-        "albumArtist",
-        "created",
-        "coverArt",
-        "genre",
-        "year",
-        "starred",
-        "songCount",
-    )
-
 private val discKey = listOf("sourceId", "albumId", "disc")
 
-private val discColumns = listOf("sourceId", "albumId", "disc", "title")
-
-private val songColumns =
-    listOf(
-        "sourceId",
-        "id",
-        "albumId",
-        "artistId",
-        "title",
-        "album",
-        "artist",
-        "duration",
-        "track",
-        "disc",
-        "starred",
-        "created",
-        "playCount",
-        "played",
-        "trackGain",
-        "albumGain",
-        "trackPeak",
-        "albumPeak",
-    )
-
-private val playlistColumns = listOf("sourceId", "id", "name", "comment", "coverArt", "songCount", "created", "changed", "duration")
-
 private fun Song.genreNames(): List<String> =
     genres
         .flatMap { it.genreParts() }
@@ -332,67 +449,154 @@ private fun Song.genreNames(): List<String> =
 // Navidrome's default genre tag split (resources/mappings.yaml): semicolon, slash, comma.
 private fun String.genreParts(): List<String> = split(';', '/', ',').map { it.trim() }.filter { it.isNotEmpty() }
 
-private val songGenreColumns = listOf("sourceId", "songId", "position", "genre")
-
 private val songGenreKey = listOf("sourceId", "songId", "position")
 
-private val playlistSongColumns = listOf("sourceId", "playlistId", "songId", "position")
+private val albumArtistKey = listOf("sourceId", "albumId", "position")
+
+private val songArtistKey = listOf("sourceId", "songId", "position")
 
 private val playlistSongKey = listOf("sourceId", "playlistId", "position")
 
-private fun Artist.values() = listOf<Any?>(sourceId, id, name, albumCount, starred, coverArt)
-
-private fun Album.values() = listOf<Any?>(sourceId, id, artistId, name, albumArtist, created, coverArt, genre, year, starred, songCount)
-
-private fun Disc.values() = listOf<Any?>(sourceId, albumId, disc, title)
-
-private fun Song.values() =
-    listOf<Any?>(
-        sourceId,
-        id,
-        albumId,
-        artistId,
-        title,
-        album,
-        artist,
-        duration,
-        track,
-        disc,
-        starred,
-        created,
-        playCount,
-        played,
-        trackGain,
-        albumGain,
-        trackPeak,
-        albumPeak,
+private fun Artist.columns(): List<Pair<String, Any?>> =
+    listOf(
+        "sourceId" to sourceId,
+        "id" to id,
+        "name" to name,
+        "albumCount" to albumCount,
+        "starred" to starred,
+        "coverArt" to coverArt,
+        "artistImageUrl" to artistImageUrl,
+        "sortName" to sortName,
     )
 
-private fun SongGenre.values() = listOf<Any?>(sourceId, songId, position, genre)
+private fun Album.columns(): List<Pair<String, Any?>> =
+    listOf(
+        "sourceId" to sourceId,
+        "id" to id,
+        "artistId" to artistId,
+        "name" to name,
+        "albumArtist" to albumArtist,
+        "created" to created,
+        "coverArt" to coverArt,
+        "genre" to genre,
+        "year" to year,
+        "starred" to starred,
+        "songCount" to songCount,
+        "artists" to ArtistRefsCodec.encode(artistRefs),
+        "sortName" to sortName,
+        "albumArtistSort" to albumArtistSort,
+    )
 
-private fun Playlist.values() = listOf<Any?>(sourceId, id, name, comment, coverArt, songCount, created, changed, duration)
+private fun AlbumArtistRef.columns(): List<Pair<String, Any?>> =
+    listOf(
+        "sourceId" to sourceId,
+        "albumId" to albumId,
+        "position" to position,
+        "artistId" to artistId,
+        "name" to name,
+    )
 
-private fun PlaylistSong.values() = listOf<Any?>(sourceId, playlistId, songId, position)
+private fun SongArtistRef.columns(): List<Pair<String, Any?>> =
+    listOf(
+        "sourceId" to sourceId,
+        "songId" to songId,
+        "position" to position,
+        "artistId" to artistId,
+        "name" to name,
+    )
+
+private fun Disc.columns(): List<Pair<String, Any?>> =
+    listOf(
+        "sourceId" to sourceId,
+        "albumId" to albumId,
+        "disc" to disc,
+        "title" to title,
+    )
+
+private fun Song.columns(): List<Pair<String, Any?>> =
+    listOf(
+        "sourceId" to sourceId,
+        "id" to id,
+        "albumId" to albumId,
+        "artistId" to artistId,
+        "title" to title,
+        "album" to album,
+        "artist" to artist,
+        "duration" to duration,
+        "track" to track,
+        "disc" to disc,
+        "starred" to starred,
+        "created" to created,
+        "playCount" to playCount,
+        "played" to played,
+        "trackGain" to trackGain,
+        "albumGain" to albumGain,
+        "trackPeak" to trackPeak,
+        "albumPeak" to albumPeak,
+        "artists" to ArtistRefsCodec.encode(artistRefs),
+        "sortName" to sortName,
+        "artistSort" to artistSort,
+    )
+
+private fun List<ArtistRef>.positions(): List<Pair<Long, ArtistRef>> =
+    filter { it.id.isNotBlank() }
+        .distinctBy { it.id }
+        .mapIndexed { index, ref -> index.toLong() to ref }
+
+private fun Album.artistPositions(): List<Pair<Long, ArtistRef>> = artistRefs.positions()
+
+private fun Song.artistPositions(): List<Pair<Long, ArtistRef>> = artistRefs.positions()
+
+private fun SongGenre.columns(): List<Pair<String, Any?>> =
+    listOf(
+        "sourceId" to sourceId,
+        "songId" to songId,
+        "position" to position,
+        "genre" to genre,
+    )
+
+private fun Playlist.columns(): List<Pair<String, Any?>> =
+    listOf(
+        "sourceId" to sourceId,
+        "id" to id,
+        "name" to name,
+        "comment" to comment,
+        "coverArt" to coverArt,
+        "songCount" to songCount,
+        "created" to created,
+        "changed" to changed,
+        "duration" to duration,
+        "owner" to owner,
+        "shared" to shared,
+    )
+
+private fun PlaylistSong.columns(): List<Pair<String, Any?>> =
+    listOf(
+        "sourceId" to sourceId,
+        "playlistId" to playlistId,
+        "songId" to songId,
+        "position" to position,
+    )
 
 private suspend fun <T> PooledConnection.upsertChanged(
     table: String,
-    columns: List<String>,
     key: List<String>,
     rows: List<T>,
-    values: (T) -> List<Any?>,
+    preserved: Set<String> = emptySet(),
+    columns: (T) -> List<Pair<String, Any?>>,
 ) {
     if (rows.isEmpty()) return
-    check(values(rows.first()).size == columns.size) { "column/value mismatch for $table" }
-    val updates = columns.filterNot { it in key }
+    val columnNames = columns(rows.first()).map { it.first }
+    val updates = columnNames.filterNot { it in key || it in preserved }
     val sql =
-        "INSERT INTO $table (${columns.joinToString()}) VALUES (${columns.joinToString { "?" }}) " +
+        "INSERT INTO $table (${columnNames.joinToString()}) VALUES (${columnNames.joinToString { "?" }}) " +
             "ON CONFLICT(${key.joinToString()}) DO UPDATE SET " +
             updates.joinToString { "$it = excluded.$it" } +
             " WHERE " +
             updates.joinToString(" OR ") { "$table.$it COLLATE BINARY IS NOT excluded.$it" }
     usePrepared(sql) { statement ->
         rows.forEach { row ->
-            values(row).forEachIndexed { index, value -> statement.bind(index + 1, value) }
+            columns(row).forEachIndexed { index, (_, value) -> statement.bind(index + 1, value) }
             statement.step()
             statement.reset()
             statement.clearBindings()

app/src/main/kotlin/com/subtracks/di/AppModule.kt

@@ -96,7 +96,7 @@ fun appModule(
             scope = get(),
         )
     }
-    single { LibraryRepository(get(), get(), get(), toast, scope = get(named("io"))) }
+    single { LibraryRepository(get(), get(), get(), get(), toast, scope = get(named("io"))) }
     single<ArtworkSeedStore> { ArtworkSeedRepository(get()) }
     single { SyncManager(get(), get(), get(), get(), preferences = get(), showMessage = toast, scope = get()) }
     single {

app/src/main/kotlin/com/subtracks/playback/Media3PlayerHandle.kt

@@ -12,6 +12,8 @@ import androidx.media3.common.util.UnstableApi
 import androidx.media3.session.MediaController
 import com.subtracks.R
 import com.subtracks.UiMessage
+import com.subtracks.data.model.ArtistRef
+import com.subtracks.data.model.ArtistRefsCodec
 import com.subtracks.data.model.AudioEncoding
 import com.subtracks.data.repo.DownloadRepository
 import com.subtracks.data.repo.SourceRepository
@@ -229,6 +231,7 @@ class Media3PlayerHandle(
                     .orEmpty(),
             artist = mediaItem.mediaMetadata.artist?.toString(),
             album = mediaItem.mediaMetadata.albumTitle?.toString(),
+            artists = mediaItem.artistRefs(),
             coverArtId = mediaItem.mediaMetadata.extras?.getString(EXTRA_COVER_ART_ID),
             durationMs =
                 mediaItem.mediaMetadata.extras
@@ -238,12 +241,20 @@ class Media3PlayerHandle(
         )
 }
 
+internal fun MediaItem.artistRefs(): List<ArtistRef> =
+    mediaMetadata.extras
+        ?.getString(EXTRA_ARTISTS)
+        ?.let(ArtistRefsCodec::decode)
+        .orEmpty()
+
 private const val EXTRA_COVER_ART_ID = "coverArtId"
+private const val EXTRA_ARTISTS = "artists"
 private const val EXTRA_DURATION_MS = "durationMs"
 private const val EXTRA_REPLAY_GAIN_TRACK_GAIN = "replayGainTrackGain"
 private const val EXTRA_REPLAY_GAIN_ALBUM_GAIN = "replayGainAlbumGain"
 private const val EXTRA_REPLAY_GAIN_TRACK_PEAK = "replayGainTrackPeak"
 private const val EXTRA_REPLAY_GAIN_ALBUM_PEAK = "replayGainAlbumPeak"
+private const val EXTRA_ALBUM_CONTEXT = "albumContext"
 
 internal fun MediaItem?.replayGain(): ReplayGain {
     val extras = this?.mediaMetadata?.extras ?: return ReplayGain()
@@ -255,6 +266,8 @@ internal fun MediaItem?.replayGain(): ReplayGain {
     )
 }
 
+internal fun MediaItem?.albumContext(): Boolean = this?.mediaMetadata?.extras?.getBoolean(EXTRA_ALBUM_CONTEXT) ?: false
+
 private fun Bundle.putGain(
     key: String,
     value: Float?,
@@ -283,11 +296,13 @@ internal fun queueMediaItem(
             .setExtras(
                 Bundle().apply {
                     putString(EXTRA_COVER_ART_ID, item.coverArtId)
+                    putString(EXTRA_ARTISTS, ArtistRefsCodec.encode(item.artists))
                     item.durationMs?.let { putLong(EXTRA_DURATION_MS, it) }
                     putGain(EXTRA_REPLAY_GAIN_TRACK_GAIN, item.replayGain.trackGain)
                     putGain(EXTRA_REPLAY_GAIN_ALBUM_GAIN, item.replayGain.albumGain)
                     putGain(EXTRA_REPLAY_GAIN_TRACK_PEAK, item.replayGain.trackPeak)
                     putGain(EXTRA_REPLAY_GAIN_ALBUM_PEAK, item.replayGain.albumPeak)
+                    putBoolean(EXTRA_ALBUM_CONTEXT, item.albumContext)
                 },
             ).build()
     val builder =

app/src/main/kotlin/com/subtracks/playback/PlaybackController.kt

@@ -1,6 +1,7 @@
 package com.subtracks.playback
 
 import com.subtracks.UiMessage
+import com.subtracks.data.model.ArtistRef
 import com.subtracks.data.model.AudioEncoding
 import com.subtracks.data.model.CoverArtRef
 import com.subtracks.data.model.QueueEntry
@@ -35,6 +36,8 @@ data class QueueItem(
     val coverArtId: String?,
     val durationMs: Long? = null,
     val replayGain: ReplayGain = ReplayGain(),
+    val albumContext: Boolean = false,
+    val artists: List<ArtistRef> = emptyList(),
 )
 
 data class QueueContext(
@@ -393,7 +396,7 @@ class PlaybackController(
             val current = currentPosition() ?: return@withLock
             val playing = player.playWhenReady
             val wasUpNext = snapshot.isUpNext(current)
-            val removed = if (position == current) null else queueRepository.itemAt(snapshot, position)?.toQueueItem()
+            val removed = if (position == current) null else queueItemAt(snapshot, position)
             queueRepository.removeAt(snapshot, position)
             var updated = readSnapshot()
             this.snapshot = updated
@@ -545,13 +548,13 @@ class PlaybackController(
             return@withLock
         }
         when {
-            fromInWindow && toInWindow -> {
+            fromInWindow && toInWindow && (snapshot.upNextSize == 0L || snapshot.isUpNext(from)) -> {
                 updating = true
                 player.move((from - windowStart).toInt(), (to - windowStart).toInt())
                 updating = false
             }
 
-            !fromInWindow && !toInWindow -> {
+            !fromInWindow && !toInWindow && (snapshot.upNextSize == 0L || snapshot.isUpNext(from)) -> {
                 // The moved track never enters the window, so the playlist is unchanged; only
                 // the window's positions shift, and a move that spans it shifts them by one.
                 when {
@@ -693,12 +696,29 @@ class PlaybackController(
             }
             return
         }
-        when {
-            current < snapshot.size - 1 -> jumpTo(current + 1)
-            repeatMode != RepeatMode.Off -> jumpTo(0)
-        }
+        nextPosition(snapshot, current)?.let { jumpTo(it) }
     }
 
+    private fun nextPosition(
+        snapshot: QueueSnapshot,
+        current: Long,
+    ): Long? =
+        when {
+            current < snapshot.size - 1 -> current + 1
+            repeatMode != RepeatMode.Off -> 0L
+            else -> null
+        }
+
+    private fun previousPosition(
+        snapshot: QueueSnapshot,
+        current: Long,
+    ): Long? =
+        when {
+            current > 0 -> current - 1
+            repeatMode == RepeatMode.All -> snapshot.size - 1
+            else -> null
+        }
+
     private suspend fun consumeUpNext(position: Long) =
         startLock.withLock {
             val snapshot = snapshot ?: return@withLock
@@ -784,19 +804,12 @@ class PlaybackController(
             }
             return
         }
-        when {
-            current > 0 -> {
-                jumpTo(current - 1)
-            }
-
-            repeatMode == RepeatMode.All -> {
-                jumpTo(snapshot.size - 1)
-            }
-
-            else -> {
-                player.seekTo(0)
-                refresh()
-            }
+        val target = previousPosition(snapshot, current)
+        if (target != null) {
+            jumpTo(target)
+        } else {
+            player.seekTo(0)
+            refresh()
         }
     }
 
@@ -814,10 +827,7 @@ class PlaybackController(
             }
             return
         }
-        when {
-            current > 0 -> jumpTo(current - 1)
-            repeatMode == RepeatMode.All -> jumpTo(snapshot.size - 1)
-        }
+        previousPosition(snapshot, current)?.let { jumpTo(it) }
     }
 
     fun addToQueue(
@@ -934,12 +944,16 @@ class PlaybackController(
         }
         val snapshot = current ?: return null
         val at = position ?: return null
-        if (!isOffline) return queueRepository.itemAt(snapshot, at + 1)?.toQueueItem()
+        if (!isOffline) {
+            return nextPosition(snapshot, at)
+                ?.takeIf { it != at }
+                ?.let { queueItemAt(snapshot, it) }
+        }
         downloads.awaitLoaded()
         val target =
             downloadedAtOrAfter(snapshot, at + 1)
                 ?: if (repeatMode != RepeatMode.Off) downloadedAtOrAfter(snapshot, 0L) else null
-        return target?.let { queueRepository.itemAt(snapshot, it)?.toQueueItem() }
+        return target?.takeIf { it != at }?.let { queueItemAt(snapshot, it) }
     }
 
     suspend fun previousItem(): QueueItem? {
@@ -953,12 +967,16 @@ class PlaybackController(
         }
         val snapshot = current ?: return null
         val at = position ?: return null
-        if (!isOffline) return if (at <= 0) null else queueRepository.itemAt(snapshot, at - 1)?.toQueueItem()
+        if (!isOffline) {
+            return previousPosition(snapshot, at)
+                ?.takeIf { it != at }
+                ?.let { queueItemAt(snapshot, it) }
+        }
         downloads.awaitLoaded()
         val target =
             downloadedAtOrBefore(snapshot, at - 1)
                 ?: if (repeatMode == RepeatMode.All) downloadedAtOrBefore(snapshot, snapshot.size - 1) else null
-        return target?.let { queueRepository.itemAt(snapshot, it)?.toQueueItem() }
+        return target?.takeIf { it != at }?.let { queueItemAt(snapshot, it) }
     }
 
     private fun play(
@@ -1117,7 +1135,7 @@ class PlaybackController(
         lastPosition = actual
         if (actual != requested) queueRepository.setCursor(actual)
         updating = true
-        player.setWindow(window.map { it.item.toQueueItem() }, startIndex, startPositionMs)
+        player.setWindow(window.map { it.playerItem(snapshot) }, startIndex, startPositionMs)
         updating = false
         if (autoplay) {
             player.prepare()
@@ -1157,7 +1175,7 @@ class PlaybackController(
                 window.forEachIndexed { index, entry ->
                     val local = downloads.localUri(entry.item.song.id) != null
                     if (local != (uris[index]?.startsWith(FILE_SCHEME) == true)) {
-                        player.replaceItem(index, entry.item.toQueueItem())
+                        player.replaceItem(index, entry.playerItem(snapshot))
                         replaced = true
                     }
                 }
@@ -1272,8 +1290,8 @@ class PlaybackController(
         updating = true
         try {
             while (windowStart > desiredStart) {
-                val item = queueRepository.itemAt(snapshot, windowStart - 1) ?: break
-                player.addFirst(item.toQueueItem())
+                val item = queueItemAt(snapshot, windowStart - 1) ?: break
+                player.addFirst(item)
                 windowStart--
             }
             while (windowStart < desiredStart) {
@@ -1281,8 +1299,8 @@ class PlaybackController(
                 windowStart++
             }
             while (windowEnd < desiredEnd) {
-                val item = queueRepository.itemAt(snapshot, windowEnd + 1) ?: break
-                player.addLast(item.toQueueItem())
+                val item = queueItemAt(snapshot, windowEnd + 1) ?: break
+                player.addLast(item)
                 windowEnd++
             }
             while (windowEnd > desiredEnd) {
@@ -1300,6 +1318,7 @@ class PlaybackController(
         position: Long,
     ) {
         val player = player ?: return
+        val snapshot = this.snapshot ?: return
         downloads.awaitLoaded()
         val ordered =
             if (offline) window.filter { downloads.localUri(it.item.song.id) != null } else window
@@ -1313,7 +1332,7 @@ class PlaybackController(
         val current = ordered[index]
         val wantsLocal = downloads.localUri(current.item.song.id) != null
         val isLocal = player.itemUris().getOrNull(player.currentIndex)?.startsWith(FILE_SCHEME) == true
-        if (wantsLocal != isLocal) player.replaceItem(player.currentIndex, current.item.toQueueItem())
+        if (wantsLocal != isLocal) player.replaceItem(player.currentIndex, current.playerItem(snapshot))
         windowPositions = LongArray(ordered.size) { ordered[it].position }
         windowFiltered = offline
         windowStart = ordered.first().position
@@ -1323,8 +1342,8 @@ class PlaybackController(
         try {
             repeat(player.currentIndex) { player.removeFirst() }
             while (player.itemCount > 1) player.removeLast()
-            for (i in index - 1 downTo 0) player.addFirst(ordered[i].item.toQueueItem())
-            for (i in index + 1 until ordered.size) player.addLast(ordered[i].item.toQueueItem())
+            for (i in index - 1 downTo 0) player.addFirst(ordered[i].playerItem(snapshot))
+            for (i in index + 1 until ordered.size) player.addLast(ordered[i].playerItem(snapshot))
         } finally {
             updating = false
         }
@@ -1466,6 +1485,17 @@ class PlaybackController(
         return snapshot
     }
 
+    private fun QueueWindowItem.playerItem(snapshot: QueueSnapshot): QueueItem =
+        item.toQueueItem(albumContext = snapshot.isAlbumContext(position))
+
+    private suspend fun queueItemAt(
+        snapshot: QueueSnapshot,
+        position: Long,
+    ): QueueItem? =
+        queueRepository
+            .itemAt(snapshot, position)
+            ?.toQueueItem(albumContext = snapshot.isAlbumContext(position))
+
     private fun contextAt(position: Long?): QueueContext? {
         val snapshot = snapshot ?: return null
         val play = position?.let { snapshot.anchorContextPlay(it) } ?: return null

app/src/main/kotlin/com/subtracks/playback/QueueItem.kt

@@ -1,14 +1,17 @@
 package com.subtracks.playback
 
+import com.subtracks.data.model.ArtistRef
 import com.subtracks.data.model.SongItem
 
-fun SongItem.toQueueItem() =
+fun SongItem.toQueueItem(albumContext: Boolean = false) =
     QueueItem(
         id = song.id,
         title = song.title,
         artist = song.artist,
+        artists = song.artistRefs,
         album = song.album,
         coverArtId = coverArt,
         durationMs = song.duration?.let { it * 1000 },
         replayGain = song.replayGain(),
+        albumContext = albumContext,
     )

app/src/main/kotlin/com/subtracks/playback/ReplayGain.kt

@@ -29,20 +29,25 @@ internal fun Song.replayGain(): ReplayGain =
 internal fun replayGainLinearGain(
     gain: ReplayGain,
     settings: ReplayGainSettings,
+    albumContext: Boolean = false,
 ): Float {
+    if (settings.mode == ReplayGainMode.Off) return 1f
     // gonic sends a peak of 0 when it only has album gain, so a non-positive or non-finite peak means
-    // "no peak data" and is ignored rather than treated as silence.
+    // "no peak data" and is ignored rather than treated as silence. A boost cannot be checked for
+    // headroom without a peak, so a peakless track is only ever attenuated.
     val trackPeak = gain.trackPeak?.takeIf { it.isFinite() && it > 0f }
     val albumPeak = gain.albumPeak?.takeIf { it.isFinite() && it > 0f }
+    val album = settings.mode == ReplayGainMode.Album || (settings.mode == ReplayGainMode.Auto && albumContext)
     val (requestedDb, peak) =
-        when (settings.mode) {
-            ReplayGainMode.Off -> return 1f
-            ReplayGainMode.Track -> (gain.trackGain ?: gain.albumGain) to (trackPeak ?: albumPeak)
-            ReplayGainMode.Album -> (gain.albumGain ?: gain.trackGain) to (albumPeak ?: trackPeak)
+        if (album) {
+            (gain.albumGain ?: gain.trackGain) to (albumPeak ?: trackPeak)
+        } else {
+            (gain.trackGain ?: gain.albumGain) to (trackPeak ?: albumPeak)
         }
     val gainDb = requestedDb?.takeIf { it.isFinite() } ?: return 1f
     val requested = gainDb + settings.preampDb
-    val applied = peak?.let { min(requested, maxSafeGainDb(it)) } ?: requested
+    val maxGainDb = peak?.let(::maxSafeGainDb) ?: 0f
+    val applied = min(requested, maxGainDb)
     return 10f.pow(applied / 20f).takeIf { it.isFinite() && it > 0f } ?: 1f
 }
 

app/src/main/kotlin/com/subtracks/playback/ReplayGainController.kt

@@ -7,11 +7,13 @@ internal class ReplayGainController(
     private val apply: (Float) -> Unit,
 ) {
     private var track = ReplayGain()
-    private var settings = ReplayGainSettings(ReplayGainMode.Track, 0f)
+    private var albumContext = false
+    private var settings = ReplayGainSettings(ReplayGainMode.Auto, 0f)
 
     @Synchronized
     fun applyItem(item: MediaItem) {
         track = item.replayGain()
+        albumContext = item.albumContext()
         applyGain()
     }
 
@@ -22,6 +24,6 @@ internal class ReplayGainController(
     }
 
     private fun applyGain() {
-        apply(replayGainLinearGain(track, settings))
+        apply(replayGainLinearGain(track, settings, albumContext))
     }
 }

app/src/main/kotlin/com/subtracks/ui/AppRoot.kt

@@ -61,14 +61,20 @@ import androidx.navigation.compose.currentBackStackEntryAsState
 import androidx.navigation.compose.rememberNavController
 import androidx.navigation.navArgument
 import com.subtracks.R
+import com.subtracks.data.model.ArtistRef
 import com.subtracks.data.model.Song
 import com.subtracks.data.repo.DownloadRepository
 import com.subtracks.data.repo.LibraryRepository
 import com.subtracks.data.repo.SourceRepository
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.AlbumInfoDialog
+import com.subtracks.ui.components.ArtistChooserSheet
+import com.subtracks.ui.components.ArtistInfoDialog
 import com.subtracks.ui.components.ContextMenuHost
 import com.subtracks.ui.components.ItemContextMenu
 import com.subtracks.ui.components.LoadingState
+import com.subtracks.ui.components.MenuTarget
+import com.subtracks.ui.components.PlaylistInfoDialog
 import com.subtracks.ui.components.SongInfoDialog
 import com.subtracks.ui.components.statusBarScrim
 import com.subtracks.ui.downloads.DownloadsRoute
@@ -230,7 +236,8 @@ private fun MainNavigation() {
     var settleJob by remember { mutableStateOf<Job?>(null) }
     val scope = rememberCoroutineScope()
     val contextMenuHost = remember { ContextMenuHost() }
-    var infoSong by remember { mutableStateOf<Song?>(null) }
+    var infoTarget by remember { mutableStateOf<MenuTarget?>(null) }
+    var artistChooser by remember { mutableStateOf<List<ArtistRef>?>(null) }
 
     val activeSourceId by libraryRepository.activeSourceId.collectAsStateWithLifecycle(initialValue = null)
     var previousSourceId by rememberSaveable { mutableStateOf<Long?>(null) }
@@ -312,7 +319,8 @@ private fun MainNavigation() {
         nowPlayingLauncher.openNowPlaying.collect {
             focusManager.clearFocus()
             contextMenuHost.dismissTransients()
-            infoSong = null
+            infoTarget = null
+            artistChooser = null
             showingQueue = false
             if (navController.currentDestination?.route in DETAIL_ROUTES) {
                 navController.popBackStack(Routes.LIBRARY, inclusive = false)
@@ -375,7 +383,15 @@ private fun MainNavigation() {
                                 navigateDetail(Routes.ALBUM_DETAIL, "albumId", album.id, Routes.album(album.id, album.coverArt))
                             },
                             onArtistClick = { artist ->
-                                navigateDetail(Routes.ARTIST_DETAIL, "artistId", artist.id, Routes.artist(artist.id, artist.coverArt))
+                                navigateDetail(
+                                    Routes.ARTIST_DETAIL,
+                                    "artistId",
+                                    artist.id,
+                                    Routes.artist(
+                                        artist.id,
+                                        artist.coverArt ?: artist.coverArts.firstOrNull(),
+                                    ),
+                                )
                             },
                             onPlaylistClick = { playlist ->
                                 navigateDetail(Routes.PLAYLIST_DETAIL, "playlistId", playlist.id, Routes.playlist(playlist.id))
@@ -418,7 +434,15 @@ private fun MainNavigation() {
                                 navigateDetail(Routes.ALBUM_DETAIL, "albumId", album.id, Routes.album(album.id, album.coverArt))
                             },
                             onArtistClick = { artist ->
-                                navigateDetail(Routes.ARTIST_DETAIL, "artistId", artist.id, Routes.artist(artist.id, artist.coverArt))
+                                navigateDetail(
+                                    Routes.ARTIST_DETAIL,
+                                    "artistId",
+                                    artist.id,
+                                    Routes.artist(
+                                        artist.id,
+                                        artist.coverArt ?: artist.coverArts.firstOrNull(),
+                                    ),
+                                )
                             },
                             onPlaylistClick = { playlist ->
                                 navigateDetail(Routes.PLAYLIST_DETAIL, "playlistId", playlist.id, Routes.playlist(playlist.id))
@@ -514,7 +538,15 @@ private fun MainNavigation() {
                                 navigateDetail(Routes.ALBUM_DETAIL, "albumId", album.id, Routes.album(album.id, album.coverArt))
                             },
                             onArtistClick = { artist ->
-                                navigateDetail(Routes.ARTIST_DETAIL, "artistId", artist.id, Routes.artist(artist.id, artist.coverArt))
+                                navigateDetail(
+                                    Routes.ARTIST_DETAIL,
+                                    "artistId",
+                                    artist.id,
+                                    Routes.artist(
+                                        artist.id,
+                                        artist.coverArt ?: artist.coverArts.firstOrNull(),
+                                    ),
+                                )
                             },
                             onViewAlbum = { albumId -> navigateDetail(Routes.ALBUM_DETAIL, "albumId", albumId, Routes.album(albumId)) },
                             onViewArtist = { artistId ->
@@ -538,7 +570,15 @@ private fun MainNavigation() {
                                 navigateDetail(Routes.ALBUM_DETAIL, "albumId", album.id, Routes.album(album.id, album.coverArt))
                             },
                             onArtistClick = { artist ->
-                                navigateDetail(Routes.ARTIST_DETAIL, "artistId", artist.id, Routes.artist(artist.id, artist.coverArt))
+                                navigateDetail(
+                                    Routes.ARTIST_DETAIL,
+                                    "artistId",
+                                    artist.id,
+                                    Routes.artist(
+                                        artist.id,
+                                        artist.coverArt ?: artist.coverArts.firstOrNull(),
+                                    ),
+                                )
                             },
                             onViewAlbum = { albumId -> navigateDetail(Routes.ALBUM_DETAIL, "albumId", albumId, Routes.album(albumId)) },
                             onViewArtist = { artistId ->
@@ -562,7 +602,15 @@ private fun MainNavigation() {
                                 navigateDetail(Routes.ALBUM_DETAIL, "albumId", album.id, Routes.album(album.id, album.coverArt))
                             },
                             onArtistClick = { artist ->
-                                navigateDetail(Routes.ARTIST_DETAIL, "artistId", artist.id, Routes.artist(artist.id, artist.coverArt))
+                                navigateDetail(
+                                    Routes.ARTIST_DETAIL,
+                                    "artistId",
+                                    artist.id,
+                                    Routes.artist(
+                                        artist.id,
+                                        artist.coverArt ?: artist.coverArts.firstOrNull(),
+                                    ),
+                                )
                             },
                             onViewAlbum = { albumId -> navigateDetail(Routes.ALBUM_DETAIL, "albumId", albumId, Routes.album(albumId)) },
                             onViewArtist = { artistId ->
@@ -588,7 +636,15 @@ private fun MainNavigation() {
                                 navigateDetail(Routes.ALBUM_DETAIL, "albumId", album.id, Routes.album(album.id, album.coverArt))
                             },
                             onArtistClick = { artist ->
-                                navigateDetail(Routes.ARTIST_DETAIL, "artistId", artist.id, Routes.artist(artist.id, artist.coverArt))
+                                navigateDetail(
+                                    Routes.ARTIST_DETAIL,
+                                    "artistId",
+                                    artist.id,
+                                    Routes.artist(
+                                        artist.id,
+                                        artist.coverArt ?: artist.coverArts.firstOrNull(),
+                                    ),
+                                )
                             },
                             onPlaylistClick = { playlist ->
                                 navigateDetail(Routes.PLAYLIST_DETAIL, "playlistId", playlist.id, Routes.playlist(playlist.id))
@@ -725,23 +781,69 @@ private fun MainNavigation() {
                     target = target,
                     actions = contextMenuHost.actions,
                     onDismiss = { contextMenuHost.dismiss() },
-                    onInfo = { infoSong = it },
+                    onInfo = { infoTarget = it },
+                    onChooseArtists = { artistChooser = it },
                 )
             }
 
-            infoSong?.let { song ->
-                val genres by
-                    remember(song.sourceId, song.id) { libraryRepository.songGenres(song.sourceId, song.id) }
-                        .collectAsStateWithLifecycle(initialValue = emptyList())
-                SongInfoDialog(
-                    song = song,
-                    download = downloads[song.id],
-                    localFile = downloadRepository.localFile(song.id),
-                    streamEncoding = playbackController.currentAudioEncoding().takeIf { playback.item?.id == song.id },
-                    onDismiss = { infoSong = null },
-                    genres = genres,
+            artistChooser?.let { artists ->
+                ArtistChooserSheet(
+                    artists = artists,
+                    onArtistClick = { artist ->
+                        artistChooser = null
+                        navigateDetail(
+                            Routes.ARTIST_DETAIL,
+                            "artistId",
+                            artist.id,
+                            Routes.artist(artist.id),
+                        )
+                    },
+                    onDismiss = { artistChooser = null },
                 )
             }
+
+            when (val target = infoTarget) {
+                is MenuTarget.Song -> {
+                    val song = target.song
+                    val genres by
+                        remember(song.sourceId, song.id) { libraryRepository.songGenres(song.sourceId, song.id) }
+                            .collectAsStateWithLifecycle(initialValue = emptyList())
+                    SongInfoDialog(
+                        song = song,
+                        download = downloads[song.id],
+                        localFile = downloadRepository.localFile(song.id),
+                        streamEncoding = playbackController.currentAudioEncoding().takeIf { playback.item?.id == song.id },
+                        onDismiss = { infoTarget = null },
+                        genres = genres,
+                    )
+                }
+
+                is MenuTarget.Album -> {
+                    AlbumInfoDialog(
+                        album = target.album,
+                        download = target.download,
+                        onDismiss = { infoTarget = null },
+                    )
+                }
+
+                is MenuTarget.Artist -> {
+                    ArtistInfoDialog(
+                        artist = target.artist,
+                        onDismiss = { infoTarget = null },
+                    )
+                }
+
+                is MenuTarget.Playlist -> {
+                    PlaylistInfoDialog(
+                        playlist = target.playlist,
+                        onDismiss = { infoTarget = null },
+                    )
+                }
+
+                null -> {
+                    Unit
+                }
+            }
         }
     }
 

app/src/main/kotlin/com/subtracks/ui/components/ArtistArt.kt

@@ -0,0 +1,310 @@
+package com.subtracks.ui.components
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Outline
+import androidx.compose.ui.graphics.Path
+import androidx.compose.ui.graphics.Shape
+import androidx.compose.ui.unit.Density
+import androidx.compose.ui.unit.LayoutDirection
+import com.subtracks.data.model.Artist
+import com.subtracks.data.model.CoverArtRef
+import com.subtracks.data.repo.SourceRepository
+import kotlin.math.PI
+import kotlin.math.cos
+import kotlin.math.min
+import kotlin.math.sin
+
+data class ArtistArt(
+    val image: CoverArtRef? = null,
+    val thumbnail: CoverArtRef? = null,
+    val covers: List<CoverArtRef> = emptyList(),
+    val fallback: ArtistArt? = null,
+) {
+    val primary: CoverArtRef? get() = image ?: covers.firstOrNull()
+}
+
+fun SourceRepository.artistArt(
+    artist: Artist,
+    forIcon: Boolean = true,
+): ArtistArt =
+    resolveArtistArt(
+        artist = artist,
+        coverArt = this::coverArt,
+        artistImage = this::artistImage,
+        offline = offline.value,
+        forIcon = forIcon,
+    )
+
+internal fun resolveArtistArt(
+    artist: Artist,
+    coverArt: (String?, Boolean) -> CoverArtRef?,
+    artistImage: (String, String?) -> CoverArtRef?,
+    offline: Boolean,
+    forIcon: Boolean,
+): ArtistArt {
+    val coverIds = if (offline) artist.downloadedCoverArts else artist.coverArts
+    val grid =
+        ArtistArt(
+            thumbnail = coverIds.singleOrNull()?.let { coverArt(it, true) },
+            covers = coverIds.take(4).mapNotNull { coverArt(it, forIcon || coverIds.size > 1) },
+        )
+    val own =
+        artist.coverArt?.let { coverId ->
+            coverArt(coverId, forIcon)?.let { image ->
+                ArtistArt(
+                    image = image,
+                    thumbnail = if (forIcon) image else coverArt(coverId, true),
+                    fallback = grid,
+                )
+            }
+        }
+    return artist.artistImageUrl
+        ?.let { artistImage(artist.id, it) }
+        ?.let { ArtistArt(image = it, thumbnail = it, fallback = own ?: grid) }
+        ?: own
+        ?: grid
+}
+
+@Composable
+fun ArtistIcon(
+    artist: Artist,
+    art: ArtistArt,
+    modifier: Modifier = Modifier,
+) {
+    var shown by remember(artist.id, art) { mutableStateOf(art) }
+    val showFallback = {
+        shown.fallback?.let { shown = it } ?: run { shown = shown.copy(image = null) }
+    }
+    when {
+        shown.image != null -> {
+            CoverArt(
+                ref = shown.image,
+                name = artist.name,
+                modifier = modifier,
+                onError = showFallback,
+            )
+        }
+
+        shown.covers.size >= 2 -> {
+            ArtistArtGrid(covers = shown.covers, name = artist.name, modifier = modifier)
+        }
+
+        else -> {
+            CoverArt(ref = shown.covers.firstOrNull(), name = artist.name, modifier = modifier)
+        }
+    }
+}
+
+@Composable
+fun ArtistHeroArt(
+    art: ArtistArt,
+    name: String,
+    modifier: Modifier = Modifier,
+) {
+    var shown by remember(art) { mutableStateOf(art) }
+    val showFallback = {
+        shown.fallback?.let { shown = it } ?: run { shown = shown.copy(image = null) }
+    }
+    when {
+        shown.image != null -> {
+            CoverArt(
+                ref = shown.image,
+                name = name,
+                thumbnailRef = shown.thumbnail,
+                showPlaceholder = false,
+                modifier = modifier,
+                onError = showFallback,
+            )
+        }
+
+        shown.covers.isNotEmpty() -> {
+            ArtistArtGrid(
+                covers = shown.covers,
+                name = name,
+                singleThumbnail = shown.thumbnail,
+                modifier = modifier,
+            )
+        }
+
+        else -> {
+            CoverArt(ref = null, name = name, modifier = modifier)
+        }
+    }
+}
+
+@Composable
+fun ArtistArtGrid(
+    covers: List<CoverArtRef>,
+    name: String,
+    modifier: Modifier = Modifier,
+    singleThumbnail: CoverArtRef? = null,
+) {
+    when {
+        covers.size >= 4 -> {
+            Column(modifier) {
+                Row(Modifier.weight(1f).fillMaxWidth()) {
+                    covers.take(2).forEach { ref ->
+                        CoverArt(ref = ref, name = name, modifier = Modifier.weight(1f).fillMaxHeight())
+                    }
+                }
+                Row(Modifier.weight(1f).fillMaxWidth()) {
+                    covers.drop(2).take(2).forEach { ref ->
+                        CoverArt(ref = ref, name = name, modifier = Modifier.weight(1f).fillMaxHeight())
+                    }
+                }
+            }
+        }
+
+        covers.size == 3 -> {
+            Box(modifier) {
+                covers.forEachIndexed { index, ref ->
+                    CoverArt(
+                        ref = ref,
+                        name = name,
+                        modifier = Modifier.matchParentSize().clip(YRegionShape(index)),
+                    )
+                }
+            }
+        }
+
+        covers.size == 2 -> {
+            Row(modifier) {
+                covers.forEach { ref ->
+                    CoverArt(ref = ref, name = name, modifier = Modifier.weight(1f).fillMaxHeight())
+                }
+            }
+        }
+
+        covers.size == 1 -> {
+            CoverArt(
+                ref = covers.first(),
+                name = name,
+                thumbnailRef = singleThumbnail,
+                showPlaceholder = false,
+                modifier = modifier,
+            )
+        }
+    }
+}
+
+private class YRegionShape(
+    private val region: Int,
+) : Shape {
+    override fun createOutline(
+        size: Size,
+        layoutDirection: LayoutDirection,
+        density: Density,
+    ): Outline {
+        val center = Offset(size.width / 2f, size.height / 2f)
+        val left = rayPoint(size, 150.0)
+        val right = rayPoint(size, 30.0)
+        val top = Offset(size.width / 2f, 0f)
+        val path = Path()
+        when (region) {
+            0 -> {
+                path.moveTo(center.x, center.y)
+                path.lineTo(right.x, right.y)
+                addClockwise(path, size, right, left)
+            }
+
+            1 -> {
+                path.moveTo(center.x, center.y)
+                path.lineTo(left.x, left.y)
+                addClockwise(path, size, left, top)
+            }
+
+            else -> {
+                path.moveTo(center.x, center.y)
+                path.lineTo(top.x, top.y)
+                addClockwise(path, size, top, right)
+            }
+        }
+        path.lineTo(center.x, center.y)
+        path.close()
+        return Outline.Generic(path)
+    }
+}
+
+private fun rayPoint(
+    size: Size,
+    angleDegrees: Double,
+): Offset {
+    val cx = size.width / 2.0
+    val cy = size.height / 2.0
+    val radians = angleDegrees * PI / 180.0
+    val dx = cos(radians)
+    val dy = sin(radians)
+    val tx =
+        when {
+            dx > 0 -> (size.width - cx) / dx
+            dx < 0 -> -cx / dx
+            else -> Double.POSITIVE_INFINITY
+        }
+    val ty =
+        when {
+            dy > 0 -> (size.height - cy) / dy
+            dy < 0 -> -cy / dy
+            else -> Double.POSITIVE_INFINITY
+        }
+    val t = min(tx, ty)
+    return Offset((cx + dx * t).toFloat(), (cy + dy * t).toFloat())
+}
+
+private fun addClockwise(
+    path: Path,
+    size: Size,
+    from: Offset,
+    to: Offset,
+) {
+    val w = size.width
+    val h = size.height
+    val corners =
+        listOf(
+            Offset(0f, 0f),
+            Offset(w, 0f),
+            Offset(w, h),
+            Offset(0f, h),
+        )
+    val fromParam = perimeterParam(from, size)
+    val toParam = perimeterParam(to, size)
+    if (fromParam <= toParam) {
+        corners
+            .filter { perimeterParam(it, size) > fromParam && perimeterParam(it, size) < toParam }
+            .forEach { path.lineTo(it.x, it.y) }
+    } else {
+        corners
+            .filter { perimeterParam(it, size) > fromParam }
+            .forEach { path.lineTo(it.x, it.y) }
+        corners
+            .filter { perimeterParam(it, size) < toParam }
+            .forEach { path.lineTo(it.x, it.y) }
+    }
+    path.lineTo(to.x, to.y)
+}
+
+private fun perimeterParam(
+    point: Offset,
+    size: Size,
+): Float {
+    val w = size.width
+    val h = size.height
+    return when {
+        point.y <= 0f -> point.x
+        point.x >= w -> w + point.y
+        point.y >= h -> w + h + (w - point.x)
+        else -> 2f * w + h + (h - point.y)
+    }
+}

app/src/main/kotlin/com/subtracks/ui/components/ArtistChooserSheet.kt

@@ -0,0 +1,72 @@
+package com.subtracks.ui.components
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.rounded.Person
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.ListItem
+import androidx.compose.material3.ListItemDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.ModalBottomSheet
+import androidx.compose.material3.Text
+import androidx.compose.material3.rememberModalBottomSheetState
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import com.subtracks.R
+import com.subtracks.data.model.ArtistRef
+
+const val ARTIST_CHOOSER_TAG = "artistChooser"
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ArtistChooserSheet(
+    artists: List<ArtistRef>,
+    onArtistClick: (ArtistRef) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState = sheetState,
+        dragHandle = null,
+        containerColor = MaterialTheme.colorScheme.surfaceContainerHigh,
+        modifier = Modifier.testTag(ARTIST_CHOOSER_TAG),
+    ) {
+        Text(
+            text = stringResource(R.string.artist_chooser_title),
+            style = MaterialTheme.typography.titleMedium,
+            modifier = Modifier.padding(start = 16.dp, top = 16.dp, end = 16.dp, bottom = 8.dp),
+        )
+        Column(
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .heightIn(max = 400.dp)
+                    .verticalScroll(rememberScrollState()),
+        ) {
+            artists.forEach { artist ->
+                ListItem(
+                    headlineContent = { Text(artist.name.ifBlank { stringResource(R.string.resources_filter_artist) }) },
+                    leadingContent = { Icon(Icons.Rounded.Person, contentDescription = null) },
+                    colors = ListItemDefaults.colors(containerColor = Color.Transparent),
+                    modifier = Modifier.clickable { onArtistClick(artist) },
+                )
+            }
+        }
+        Spacer(Modifier.height(16.dp))
+    }
+}

app/src/main/kotlin/com/subtracks/ui/components/Components.kt

@@ -85,12 +85,15 @@ fun CoverArt(
     square: Boolean = true,
     elevation: Dp = 0.dp,
     colorFilter: ColorFilter? = null,
+    onError: (() -> Unit)? = null,
 ) {
     val context = LocalPlatformContext.current
     val refKey = ref?.cacheKey
     val thumbnailKey = thumbnailRef?.cacheKey
+    val hasThumbnailFallback = thumbnailRef != null && thumbnailRef != ref
     var failed by remember(refKey, thumbnailKey) { mutableStateOf(false) }
     var thumbnailLoaded by remember(refKey, thumbnailKey) { mutableStateOf(false) }
+    var thumbnailFailed by remember(refKey, thumbnailKey) { mutableStateOf(false) }
     var thumbnailRatio by remember(refKey, thumbnailKey) { mutableStateOf(thumbnailKey?.let(ArtworkRatioCache::get)) }
     val letterScheme =
         if (showPlaceholder || (failed && !thumbnailLoaded)) {
@@ -115,6 +118,10 @@ fun CoverArt(
                 thumbnailLoaded = thumbnailLoaded,
                 onThumbnailLoaded = { thumbnailLoaded = true },
                 onThumbnailRatio = { thumbnailRatio = it },
+                onThumbnailError = {
+                    thumbnailFailed = true
+                    if (failed) onError?.invoke()
+                },
                 contentScale = ContentScale.Crop,
                 colorFilter = colorFilter,
                 placeholderContentColor = letterScheme?.onPrimaryContainer,
@@ -131,7 +138,10 @@ fun CoverArt(
                                 .ratioOrNull()
                                 ?.let { ArtworkRatioCache.put(ref.cacheKey, it) }
                         },
-                        onError = { failed = true },
+                        onError = {
+                            failed = true
+                            if (!hasThumbnailFallback || thumbnailFailed) onError?.invoke()
+                        },
                         modifier = Modifier.fillMaxSize(),
                     )
                 }
@@ -160,7 +170,10 @@ fun CoverArt(
                                 )
                             }
                         },
-                    onError = { failed = true },
+                    onError = {
+                        failed = true
+                        if (!hasThumbnailFallback || thumbnailFailed) onError?.invoke()
+                    },
                     contentScale = ContentScale.Fit,
                     filterQuality = FilterQuality.High,
                 )
@@ -179,6 +192,10 @@ fun CoverArt(
                     thumbnailLoaded = thumbnailLoaded,
                     onThumbnailLoaded = { thumbnailLoaded = true },
                     onThumbnailRatio = { thumbnailRatio = it },
+                    onThumbnailError = {
+                        thumbnailFailed = true
+                        if (failed) onError?.invoke()
+                    },
                     contentScale = ContentScale.Fit,
                     colorFilter = colorFilter,
                     placeholderContentColor = letterScheme?.onPrimaryContainer,
@@ -208,6 +225,7 @@ private fun BoxScope.CoverArtContent(
     thumbnailLoaded: Boolean,
     onThumbnailLoaded: () -> Unit,
     onThumbnailRatio: (Float) -> Unit,
+    onThumbnailError: () -> Unit,
     contentScale: ContentScale,
     colorFilter: ColorFilter?,
     placeholderContentColor: Color?,
@@ -246,6 +264,7 @@ private fun BoxScope.CoverArtContent(
                         ArtworkRatioCache.put(thumbnailRef.cacheKey, it)
                     }
             },
+            onError = { onThumbnailError() },
             modifier = Modifier.fillMaxSize(),
         )
     }

app/src/main/kotlin/com/subtracks/ui/components/DeleteDownloadsDialog.kt

@@ -6,10 +6,21 @@ import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.State
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.rememberUpdatedState
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import com.subtracks.R
+import com.subtracks.data.model.BulkDownloadAction
 import com.subtracks.data.model.DownloadList
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.launch
 
 data class PendingDownloadDelete(
     val name: String,
@@ -18,6 +29,70 @@ data class PendingDownloadDelete(
     val bytes: Long,
 )
 
+class PendingDownloadDeleteController internal constructor(
+    private val scope: CoroutineScope,
+    private val downloadedBytes: State<suspend (DownloadList, String) -> Long>,
+) {
+    var pending by mutableStateOf<PendingDownloadDelete?>(null)
+        private set
+
+    fun onAction(
+        target: MenuTarget,
+        action: BulkDownloadAction,
+        onAction: (DownloadList, String, BulkDownloadAction) -> Unit,
+    ) {
+        val (list, refId) = target.bulkRef() ?: return
+        onAction(target.title, list, refId, action, onAction)
+    }
+
+    fun onAction(
+        name: String,
+        list: DownloadList,
+        refId: String,
+        action: BulkDownloadAction,
+        onAction: (DownloadList, String, BulkDownloadAction) -> Unit,
+    ) {
+        if (action == BulkDownloadAction.Delete) {
+            scope.launch {
+                pending = PendingDownloadDelete(name, list, refId, downloadedBytes.value(list, refId))
+            }
+        } else {
+            onAction(list, refId, action)
+        }
+    }
+
+    fun dismiss() {
+        pending = null
+    }
+}
+
+@Composable
+fun rememberPendingDownloadDelete(
+    dismissals: Flow<Unit>,
+    downloadedBytes: suspend (DownloadList, String) -> Long,
+): PendingDownloadDeleteController {
+    val scope = rememberCoroutineScope()
+    val currentDownloadedBytes = rememberUpdatedState(downloadedBytes)
+    val controller = remember(scope) { PendingDownloadDeleteController(scope, currentDownloadedBytes) }
+    DismissOnRequest(dismissals, controller::dismiss)
+    return controller
+}
+
+@Composable
+fun PendingDownloadDeleteConfirmation(
+    controller: PendingDownloadDeleteController,
+    onConfirm: (PendingDownloadDelete) -> Unit,
+) {
+    controller.pending?.let { pending ->
+        DeleteDownloadsDialog(
+            name = pending.name,
+            bytes = pending.bytes,
+            onConfirm = { onConfirm(pending) },
+            onDismiss = controller::dismiss,
+        )
+    }
+}
+
 @Composable
 fun DeleteDownloadsDialog(
     name: String,

app/src/main/kotlin/com/subtracks/ui/components/HeroDetailScaffold.kt

@@ -24,6 +24,7 @@ import androidx.compose.foundation.layout.statusBars
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListScope
+import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -47,12 +48,17 @@ import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableFloatStateOf
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
+import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -98,12 +104,13 @@ fun HeroDetailScaffold(
     header: @Composable (controlsModifier: Modifier, topInset: Dp) -> Unit,
     content: LazyListScope.(rowModifier: Modifier) -> Unit,
     modifier: Modifier = Modifier,
+    contentReady: Boolean = true,
 ) {
     val effectiveArtwork = artwork ?: baseArtworkColors()
     CompositionLocalProvider(LocalContentColor provides MaterialTheme.colorScheme.onBackground) {
         ArtworkTheme(effectiveArtwork) {
             BoxWithConstraints(modifier.fillMaxSize().background(MaterialTheme.colorScheme.background)) {
-                val listState = rememberLazyListState()
+                val listState = rememberRestorableLazyListState(contentReady)
                 val scope = rememberCoroutineScope()
                 val fill = rememberViewportFill(listState)
                 val density = LocalDensity.current
@@ -114,9 +121,9 @@ fun HeroDetailScaffold(
                 val barHeightPx = statusBarTop + with(density) { TopAppBarDefaults.TopAppBarExpandedHeight.toPx() }
                 val fadeDistancePx = with(density) { FADE_DISTANCE_DP.dp.toPx() }
 
-                var headerHeightPx by remember { mutableFloatStateOf(0f) }
-                var rowHeightPx by remember { mutableFloatStateOf(0f) }
-                var controlsTopPx by remember { mutableFloatStateOf(0f) }
+                var headerHeightPx by rememberSaveable { mutableFloatStateOf(0f) }
+                var rowHeightPx by rememberSaveable { mutableFloatStateOf(0f) }
+                var controlsTopPx by rememberSaveable { mutableFloatStateOf(0f) }
                 val scrollPx by remember {
                     derivedStateOf {
                         val index = listState.firstVisibleItemIndex
@@ -206,6 +213,31 @@ fun HeroDetailScaffold(
     }
 }
 
+@Composable
+private fun rememberRestorableLazyListState(contentReady: Boolean): LazyListState {
+    val state = rememberLazyListState()
+    var index by rememberSaveable { mutableIntStateOf(state.firstVisibleItemIndex) }
+    var offset by rememberSaveable { mutableIntStateOf(state.firstVisibleItemScrollOffset) }
+    var pending by remember { mutableStateOf(index > 0 || offset > 0) }
+    LaunchedEffect(contentReady) {
+        if (contentReady && pending) {
+            val target = index.coerceAtMost((state.layoutInfo.totalItemsCount - 1).coerceAtLeast(0))
+            state.scrollToItem(target, offset)
+            pending = false
+        }
+    }
+    LaunchedEffect(state) {
+        snapshotFlow { state.firstVisibleItemIndex to state.firstVisibleItemScrollOffset }
+            .collect { (currentIndex, currentOffset) ->
+                if (!pending) {
+                    index = currentIndex
+                    offset = currentOffset
+                }
+            }
+    }
+    return state
+}
+
 @Composable
 private fun HeroSubtitle(
     text: String,
@@ -257,6 +289,7 @@ fun HeroHeader(
     thumbnailRef: CoverArtRef? = null,
     comment: String? = null,
     onSubtitleClick: (() -> Unit)? = null,
+    nameMaxLines: Int = 2,
 ) {
     Column(
         modifier =
@@ -278,7 +311,7 @@ fun HeroHeader(
             text = name,
             style = MaterialTheme.typography.headlineMedium,
             textAlign = TextAlign.Center,
-            maxLines = 2,
+            maxLines = nameMaxLines,
             overflow = TextOverflow.Ellipsis,
         )
         val subtitleIsTarget = onSubtitleClick != null && subtitle.isNotEmpty() && comment.isNullOrBlank()
@@ -290,7 +323,11 @@ fun HeroHeader(
                 modifier =
                     Modifier
                         .heightIn(min = 32.dp)
-                        .clickable(onClickLabel = stringResource(R.string.open_artist)) { onSubtitleClick() },
+                        .clickable(
+                            interactionSource = remember { MutableInteractionSource() },
+                            indication = null,
+                            onClickLabel = stringResource(R.string.open_artist),
+                        ) { onSubtitleClick() },
                 contentAlignment = Alignment.TopCenter,
             ) {
                 HeroSubtitle(subtitle, Modifier.padding(top = 4.dp))

app/src/main/kotlin/com/subtracks/ui/components/ItemContextMenu.kt

@@ -6,12 +6,16 @@ import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.rounded.KeyboardArrowRight
 import androidx.compose.material.icons.automirrored.rounded.QueueMusic
 import androidx.compose.material.icons.rounded.Album
 import androidx.compose.material.icons.rounded.Cancel
@@ -47,6 +51,7 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import com.subtracks.R
+import com.subtracks.data.model.ArtistRef
 import com.subtracks.data.model.BulkDownloadAction
 import com.subtracks.data.model.CoverArtRef
 import com.subtracks.data.model.DownloadList
@@ -77,7 +82,7 @@ sealed interface MenuTarget {
     ) : MenuTarget {
         override val title: String get() = song.title
 
-        override val subtitle: String? get() = song.artist
+        override val subtitle: String? get() = song.artistSubtitle()
     }
 
     data class Album(
@@ -194,7 +199,8 @@ fun ItemContextMenu(
     target: MenuTarget,
     actions: ItemActions,
     onDismiss: () -> Unit,
-    onInfo: ((SongModel) -> Unit)? = null,
+    onInfo: ((MenuTarget) -> Unit)? = null,
+    onChooseArtists: ((List<ArtistRef>) -> Unit)? = null,
 ) {
     val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
     val scope = rememberCoroutineScope()
@@ -207,6 +213,11 @@ fun ItemContextMenu(
         }
     }
 
+    fun replaceWith(after: () -> Unit) {
+        onDismiss()
+        after()
+    }
+
     val queueRef = target.queueRef()
 
     @Composable
@@ -226,76 +237,75 @@ fun ItemContextMenu(
         dragHandle = null,
         containerColor = MaterialTheme.colorScheme.surfaceContainerHigh,
     ) {
-        MenuHeader(target)
-        when (target) {
-            is MenuTarget.Song -> {
-                queueItems()
-                DownloadItem(target.download, target.song, actions, ::dismiss)
-                StarItem(
-                    current = target.song.starred,
-                    onSet = { starring -> actions.setStar(StarType.Song, target.song.id, starring) },
-                    onDismiss = { dismiss() },
-                )
-                target.song.albumId?.let { albumId ->
-                    actions.viewAlbum?.let { view ->
-                        MenuItem(
-                            Icons.Rounded.Album,
-                            target.song.album?.takeIf { it.isNotBlank() } ?: stringResource(R.string.resources_filter_album),
-                        ) {
-                            dismiss { view(albumId) }
+        Column(
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .heightIn(max = MENU_MAX_HEIGHT)
+                    .verticalScroll(rememberScrollState()),
+        ) {
+            MenuHeader(target)
+            when (target) {
+                is MenuTarget.Song -> {
+                    queueItems()
+                    DownloadItem(target.download, target.song, actions, ::dismiss)
+                    StarItem(
+                        current = target.song.starred,
+                        onSet = { starring -> actions.setStar(StarType.Song, target.song.id, starring) },
+                        onDismiss = { dismiss() },
+                    )
+                    target.song.albumId?.let { albumId ->
+                        actions.viewAlbum?.let { view ->
+                            MenuItem(
+                                Icons.Rounded.Album,
+                                target.song.album?.takeIf { it.isNotBlank() } ?: stringResource(R.string.resources_filter_album),
+                            ) {
+                                dismiss { view(albumId) }
+                            }
                         }
                     }
-                }
-                target.song.artistId?.let { artistId ->
-                    actions.viewArtist?.let { view ->
-                        MenuItem(
-                            Icons.Rounded.Person,
-                            target.song.artist?.takeIf { it.isNotBlank() } ?: stringResource(R.string.resources_filter_artist),
-                        ) {
-                            dismiss { view(artistId) }
-                        }
+                    ArtistItems(target.song.artistRefs, actions, onChooseArtists, ::dismiss, ::replaceWith)
+                    onInfo?.let { info ->
+                        MenuItem(Icons.Rounded.Info, stringResource(R.string.info)) { dismiss { info(target) } }
                     }
                 }
-                onInfo?.let { info ->
-                    MenuItem(Icons.Rounded.Info, stringResource(R.string.info)) { dismiss { info(target.song) } }
-                }
-            }
 
-            is MenuTarget.Album -> {
-                queueItems()
-                BulkDownloadItem(target, actions, ::dismiss)
-                StarItem(
-                    current = target.album.starred,
-                    onSet = { starring -> actions.setStar(StarType.Album, target.album.id, starring) },
-                    onDismiss = { dismiss() },
-                )
-                target.album.artistId?.let { artistId ->
-                    actions.viewArtist?.let { view ->
-                        MenuItem(
-                            Icons.Rounded.Person,
-                            target.album.albumArtist?.takeIf { it.isNotBlank() } ?: stringResource(R.string.resources_filter_artist),
-                        ) {
-                            dismiss { view(artistId) }
-                        }
+                is MenuTarget.Album -> {
+                    queueItems()
+                    BulkDownloadItem(target, actions, ::dismiss)
+                    StarItem(
+                        current = target.album.starred,
+                        onSet = { starring -> actions.setStar(StarType.Album, target.album.id, starring) },
+                        onDismiss = { dismiss() },
+                    )
+                    ArtistItems(target.album.artistRefs, actions, onChooseArtists, ::dismiss, ::replaceWith)
+                    onInfo?.let { info ->
+                        MenuItem(Icons.Rounded.Info, stringResource(R.string.info)) { dismiss { info(target) } }
+                    }
+                }
+
+                is MenuTarget.Artist -> {
+                    BulkDownloadItem(target, actions, ::dismiss)
+                    StarItem(
+                        current = target.artist.starred,
+                        onSet = { starring -> actions.setStar(StarType.Artist, target.artist.id, starring) },
+                        onDismiss = { dismiss() },
+                    )
+                    onInfo?.let { info ->
+                        MenuItem(Icons.Rounded.Info, stringResource(R.string.info)) { dismiss { info(target) } }
+                    }
+                }
+
+                is MenuTarget.Playlist -> {
+                    queueItems()
+                    BulkDownloadItem(target, actions, ::dismiss)
+                    onInfo?.let { info ->
+                        MenuItem(Icons.Rounded.Info, stringResource(R.string.info)) { dismiss { info(target) } }
                     }
                 }
             }
-
-            is MenuTarget.Artist -> {
-                BulkDownloadItem(target, actions, ::dismiss)
-                StarItem(
-                    current = target.artist.starred,
-                    onSet = { starring -> actions.setStar(StarType.Artist, target.artist.id, starring) },
-                    onDismiss = { dismiss() },
-                )
-            }
-
-            is MenuTarget.Playlist -> {
-                queueItems()
-                BulkDownloadItem(target, actions, ::dismiss)
-            }
+            Spacer(Modifier.height(16.dp))
         }
-        Spacer(Modifier.height(16.dp))
     }
 }
 
@@ -331,6 +341,55 @@ private fun MenuHeader(target: MenuTarget) {
     }
 }
 
+@Composable
+private fun ArtistItems(
+    artists: List<ArtistRef>,
+    actions: ItemActions,
+    onChooseArtists: ((List<ArtistRef>) -> Unit)?,
+    dismiss: (() -> Unit) -> Unit,
+    replaceWith: (() -> Unit) -> Unit,
+) {
+    val view = actions.viewArtist ?: return
+    val distinct = artists.distinctBy { it.id }
+    when (distinct.size) {
+        0 -> {
+            Unit
+        }
+
+        1 -> {
+            val artist = distinct.first()
+            MenuItem(
+                Icons.Rounded.Person,
+                artist.name.takeIf { it.isNotBlank() } ?: stringResource(R.string.resources_filter_artist),
+            ) {
+                dismiss { view(artist.id) }
+            }
+        }
+
+        else -> {
+            if (onChooseArtists == null) {
+                distinct.forEach { artist ->
+                    MenuItem(
+                        Icons.Rounded.Person,
+                        artist.name.takeIf { it.isNotBlank() } ?: stringResource(R.string.resources_filter_artist),
+                    ) {
+                        dismiss { view(artist.id) }
+                    }
+                }
+            } else {
+                val fallback = stringResource(R.string.resources_filter_artist)
+                MenuItem(
+                    Icons.Rounded.Person,
+                    distinct.joinToString(" \u00B7 ") { it.name.ifBlank { fallback } },
+                    trailing = { Icon(Icons.AutoMirrored.Rounded.KeyboardArrowRight, contentDescription = null) },
+                ) {
+                    replaceWith { onChooseArtists(distinct) }
+                }
+            }
+        }
+    }
+}
+
 @Composable
 private fun DownloadItem(
     download: SongDownload?,
@@ -428,11 +487,19 @@ private fun MenuItem(
     icon: ImageVector,
     label: String,
     tint: Color? = null,
+    trailing: (@Composable () -> Unit)? = null,
     onClick: () -> Unit,
 ) {
     ListItem(
-        headlineContent = { Text(label) },
+        headlineContent = {
+            Text(
+                text = label,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+            )
+        },
         leadingContent = { Icon(icon, contentDescription = null, tint = tint ?: LocalContentColor.current) },
+        trailingContent = trailing,
         colors = ListItemDefaults.colors(containerColor = Color.Transparent),
         modifier = Modifier.clickable(onClick = onClick),
     )
@@ -445,3 +512,4 @@ private fun starLabel(starred: Long?): String =
     if (starred == null) stringResource(R.string.actions_star) else stringResource(R.string.actions_unstar)
 
 private const val STAR_DISMISS_DELAY_MS = 200L
+private val MENU_MAX_HEIGHT = 560.dp

app/src/main/kotlin/com/subtracks/ui/components/LibraryInfoDialog.kt

@@ -0,0 +1,160 @@
+package com.subtracks.ui.components
+
+import android.content.Context
+import android.text.format.DateUtils
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import com.subtracks.R
+import com.subtracks.data.model.Album
+import com.subtracks.data.model.Artist
+import com.subtracks.data.model.ArtistRef
+import com.subtracks.data.model.ListDownloadStatus
+import com.subtracks.data.model.Playlist
+
+private const val ARTIST_SEPARATOR = " \u00B7 "
+
+@Composable
+fun AlbumInfoDialog(
+    album: Album,
+    download: ListDownloadStatus?,
+    onDismiss: () -> Unit,
+) {
+    val context = LocalContext.current
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringResource(R.string.info)) },
+        text = {
+            Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                InfoRow(stringResource(R.string.resources_sort_by_title), album.name)
+                InfoRow(stringResource(R.string.info_sort_title), album.sortName.takeIfDifferentFrom(album.name))
+                InfoRow(stringResource(R.string.info_album_artists), album.artistRefs.names())
+                InfoRow(stringResource(R.string.info_album_artist_sort), album.albumArtistSort.takeIfDifferentFrom(album.albumArtist))
+                InfoRow(stringResource(R.string.resources_sort_by_year), album.year?.takeIf { it > 0 }?.toString())
+                InfoRow(stringResource(R.string.resources_filter_genre), album.genre)
+                InfoRow(stringResource(R.string.info_songs), album.songCount.takeIf { it > 0 }?.toString())
+                download?.takeIf { it.total > 0 }?.let { status ->
+                    InfoRow(
+                        stringResource(R.string.status_downloaded),
+                        stringResource(R.string.info_downloaded_count, status.downloaded, status.total),
+                    )
+                }
+                InfoRow(stringResource(R.string.info_added), album.created.takeIf { it > 0 }?.let { formatDate(context, it) })
+                InfoRow(stringResource(R.string.info_last_played), album.played?.let { formatDate(context, it) })
+                InfoRow(stringResource(R.string.info_plays), album.playCount.takeIf { it > 0 }?.toString())
+                InfoRow(stringResource(R.string.info_starred), if (album.starred != null) stringResource(R.string.info_yes) else null)
+            }
+        },
+        confirmButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.info_close)) } },
+    )
+}
+
+@Composable
+fun ArtistInfoDialog(
+    artist: Artist,
+    onDismiss: () -> Unit,
+) {
+    val context = LocalContext.current
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringResource(R.string.info)) },
+        text = {
+            Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                InfoRow(stringResource(R.string.resources_filter_artist), artist.name)
+                InfoRow(stringResource(R.string.info_sort_name), artist.sortName.takeIfDifferentFrom(artist.name))
+                InfoRow(stringResource(R.string.info_albums), artist.albumCount.takeIf { it > 0 }?.toString())
+                InfoRow(stringResource(R.string.info_songs), artist.songCount.takeIf { it > 0 }?.toString())
+                InfoRow(stringResource(R.string.info_plays), artist.playCount.takeIf { it > 0 }?.toString())
+                InfoRow(stringResource(R.string.info_last_played), artist.played?.let { formatDate(context, it) })
+                InfoRow(stringResource(R.string.info_starred), if (artist.starred != null) stringResource(R.string.info_yes) else null)
+            }
+        },
+        confirmButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.info_close)) } },
+    )
+}
+
+@Composable
+fun PlaylistInfoDialog(
+    playlist: Playlist,
+    onDismiss: () -> Unit,
+) {
+    val context = LocalContext.current
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringResource(R.string.info)) },
+        text = {
+            Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                InfoRow(stringResource(R.string.resources_sort_by_title), playlist.name)
+                InfoRow(stringResource(R.string.info_owner), playlist.owner)
+                InfoRow(stringResource(R.string.info_shared), if (playlist.shared) stringResource(R.string.info_yes) else null)
+                InfoRow(stringResource(R.string.info_songs), playlist.songCount.takeIf { it > 0 }?.toString())
+                InfoRow(stringResource(R.string.info_length), playlist.duration.takeIf { it > 0 }?.let(DateUtils::formatElapsedTime))
+                InfoRow(stringResource(R.string.info_created), playlist.created.takeIf { it > 0 }?.let { formatDate(context, it) })
+                InfoRow(stringResource(R.string.info_updated), playlist.changed.takeIf { it > 0 }?.let { formatDate(context, it) })
+            }
+        },
+        confirmButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.info_close)) } },
+    )
+}
+
+internal fun String?.takeIfDifferentFrom(regular: String?): String? =
+    this?.trim()?.takeIf { value -> value.isNotEmpty() && !value.equals(regular?.trim(), ignoreCase = true) }
+
+@Composable
+internal fun InfoRow(
+    label: String,
+    value: String?,
+) {
+    if (value.isNullOrBlank()) return
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        Text(
+            text = label,
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.primary,
+            modifier = Modifier.width(INFO_LABEL_WIDTH),
+        )
+        Spacer(Modifier.width(INFO_LABEL_GAP))
+        Text(
+            text = value,
+            style = MaterialTheme.typography.bodyMedium,
+            modifier = Modifier.weight(1f),
+        )
+    }
+}
+
+private fun List<ArtistRef>.names(): String? =
+    map { it.name }
+        .filter { it.isNotBlank() }
+        .distinct()
+        .joinToString(ARTIST_SEPARATOR)
+        .takeIf { it.isNotEmpty() }
+
+private fun formatDate(
+    context: Context,
+    epochSeconds: Long,
+): String =
+    DateUtils.formatDateTime(
+        context,
+        epochSeconds * 1000,
+        DateUtils.FORMAT_SHOW_DATE or DateUtils.FORMAT_SHOW_YEAR,
+    )
+
+private val INFO_LABEL_WIDTH = 100.dp
+private val INFO_LABEL_GAP = 12.dp

app/src/main/kotlin/com/subtracks/ui/components/SearchField.kt

@@ -20,6 +20,10 @@ import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.focus.FocusRequester
@@ -28,6 +32,8 @@ import androidx.compose.ui.graphics.SolidColor
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.contentDescription
 import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.text.TextRange
+import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import com.subtracks.R
@@ -43,6 +49,12 @@ fun SearchField(
 ) {
     val hint = stringResource(R.string.search_input_placeholder)
     val closeLabel = stringResource(R.string.close_search)
+    var textFieldValue by remember { mutableStateOf(TextFieldValue(value, selection = TextRange(value.length))) }
+    LaunchedEffect(value) {
+        if (value != textFieldValue.text) {
+            textFieldValue = TextFieldValue(value, selection = TextRange(value.length))
+        }
+    }
     LaunchedEffect(Unit) { focusRequester.requestFocus() }
     Surface(
         shape = RoundedCornerShape(8.dp),
@@ -62,8 +74,11 @@ fun SearchField(
             )
             Spacer(Modifier.width(8.dp))
             BasicTextField(
-                value = value,
-                onValueChange = onValueChange,
+                value = textFieldValue,
+                onValueChange = {
+                    textFieldValue = it
+                    onValueChange(it.text)
+                },
                 singleLine = true,
                 textStyle = MaterialTheme.typography.bodyLarge.copy(color = MaterialTheme.colorScheme.onSurface),
                 cursorBrush = SolidColor(MaterialTheme.colorScheme.primary),
@@ -73,7 +88,7 @@ fun SearchField(
                         .focusRequester(focusRequester)
                         .semantics { contentDescription = hint },
                 decorationBox = { inner ->
-                    if (value.isEmpty()) {
+                    if (textFieldValue.text.isEmpty()) {
                         Text(
                             text = hint,
                             style = MaterialTheme.typography.bodyLarge,

app/src/main/kotlin/com/subtracks/ui/components/SongArtist.kt

@@ -0,0 +1,31 @@
+package com.subtracks.ui.components
+
+import com.subtracks.data.model.ArtistRef
+import com.subtracks.data.model.Song
+
+private const val ARTIST_SEPARATOR = " \u00B7 "
+
+internal fun Song.artistSubtitle(): String? = artistSubtitle(artist, artists)
+
+internal fun Song.artistNames(): List<String> = artistNames(artist, artists)
+
+internal fun artistNames(
+    artist: String?,
+    artists: List<ArtistRef>,
+): List<String> {
+    val names = artists.map { it.name }.filter { it.isNotBlank() }.distinct()
+    return names.ifEmpty { listOfNotNull(artist?.takeIf { it.isNotBlank() }) }
+}
+
+internal fun artistSubtitle(
+    artist: String?,
+    artists: List<ArtistRef>,
+): String? {
+    val names = artistNames(artist, artists)
+    if (names.isEmpty()) return null
+    val primary = artist?.takeIf { it in names }
+    return buildList {
+        primary?.let(::add)
+        addAll(names.filterNot { it == primary })
+    }.joinToString(ARTIST_SEPARATOR)
+}

app/src/main/kotlin/com/subtracks/ui/components/SongInfoDialog.kt

@@ -4,12 +4,7 @@ import android.text.format.DateUtils
 import android.text.format.Formatter
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.width
 import androidx.compose.material3.AlertDialog
-import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
@@ -18,8 +13,6 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
@@ -53,8 +46,20 @@ fun SongInfoDialog(
         title = { Text(stringResource(R.string.info)) },
         text = {
             Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                val multipleArtists = song.artistNames().size > 1
+                val regularArtistSort = song.artist?.takeIf { it.isNotBlank() } ?: song.artistRefs.firstOrNull()?.name
                 InfoRow(stringResource(R.string.resources_sort_by_title), song.title)
-                InfoRow(stringResource(R.string.resources_filter_artist), song.artist)
+                InfoRow(stringResource(R.string.info_sort_title), song.sortName.takeIfDifferentFrom(song.title))
+                InfoRow(
+                    stringResource(
+                        if (multipleArtists) R.string.info_artists else R.string.resources_filter_artist,
+                    ),
+                    song.artistSubtitle(),
+                )
+                InfoRow(
+                    stringResource(if (multipleArtists) R.string.info_artists_sort else R.string.info_artist_sort),
+                    song.artistSort.takeIfDifferentFrom(regularArtistSort),
+                )
                 InfoRow(stringResource(R.string.resources_filter_album), song.album)
                 InfoRow(stringResource(R.string.info_duration), song.duration?.let(DateUtils::formatElapsedTime))
                 InfoRow(
@@ -92,32 +97,6 @@ fun SongInfoDialog(
     )
 }
 
-@Composable
-private fun InfoRow(
-    label: String,
-    value: String?,
-) {
-    if (value.isNullOrBlank()) return
-    Row(
-        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        Text(
-            text = label,
-            style = MaterialTheme.typography.bodySmall,
-            color = MaterialTheme.colorScheme.primary,
-            modifier = Modifier.width(INFO_LABEL_WIDTH),
-        )
-        Text(
-            text = value,
-            style = MaterialTheme.typography.bodyMedium,
-            modifier = Modifier.weight(1f),
-        )
-    }
-}
-
-private val INFO_LABEL_WIDTH = 80.dp
-
 @Composable
 private fun downloadStatus(status: DownloadStatus): String =
     when (status) {

app/src/main/kotlin/com/subtracks/ui/downloads/DownloadsScreen.kt

@@ -13,10 +13,10 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.rounded.ArrowBack
+import androidx.compose.material.icons.automirrored.rounded.KeyboardArrowRight
 import androidx.compose.material.icons.rounded.Close
 import androidx.compose.material.icons.rounded.Delete
-import androidx.compose.material.icons.rounded.ExpandLess
-import androidx.compose.material.icons.rounded.ExpandMore
+import androidx.compose.material.icons.rounded.KeyboardArrowDown
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
@@ -274,7 +274,7 @@ private fun NodeRow(
         leadingContent = {
             IconButton(onClick = onToggle) {
                 Icon(
-                    imageVector = if (expanded) Icons.Rounded.ExpandLess else Icons.Rounded.ExpandMore,
+                    imageVector = if (expanded) Icons.Rounded.KeyboardArrowDown else Icons.AutoMirrored.Rounded.KeyboardArrowRight,
                     contentDescription = if (expanded) stringResource(R.string.collapse) else stringResource(R.string.expand),
                 )
             }

app/src/main/kotlin/com/subtracks/ui/downloads/DownloadsViewModel.kt

@@ -31,6 +31,7 @@ data class DownloadArtistNode(
     val name: String,
     val bytes: Long,
     val albums: List<DownloadAlbumNode>,
+    val sortName: String = name,
 )
 
 data class DownloadAlbumNode(
@@ -38,6 +39,7 @@ data class DownloadAlbumNode(
     val name: String,
     val bytes: Long,
     val songs: List<DownloadedSong>,
+    val sortName: String = name,
 )
 
 @OptIn(ExperimentalCoroutinesApi::class)
@@ -105,6 +107,7 @@ internal fun buildTree(
                         id = artistKey.first,
                         name = artistKey.second.ifBlank { unknownArtist },
                         bytes = artistSongs.sumOf { it.size },
+                        sortName = artistSongs.first().artistSort.ifBlank { artistKey.second },
                         albums =
                             artistSongs
                                 .groupBy { it.albumId.orEmpty() to it.albumName.orEmpty() }
@@ -113,9 +116,10 @@ internal fun buildTree(
                                         id = albumKey.first,
                                         name = albumKey.second.ifBlank { unknownAlbum },
                                         bytes = albumSongs.sumOf { it.size },
-                                        songs = albumSongs.sortedBy { it.title.lowercase() },
+                                        sortName = albumSongs.first().albumSort.ifBlank { albumKey.second },
+                                        songs = albumSongs,
                                     )
-                                }.sortedBy { it.name.lowercase() },
+                                }.sortedBy { it.sortName.lowercase() },
                     )
-                }.sortedBy { it.name.lowercase() },
+                }.sortedBy { it.sortName.lowercase() },
     )

app/src/main/kotlin/com/subtracks/ui/home/HomeListScreen.kt

@@ -57,6 +57,8 @@ import com.subtracks.data.model.Playlist
 import com.subtracks.data.model.Song
 import com.subtracks.data.source.StarType
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistArt
+import com.subtracks.ui.components.ArtistIcon
 import com.subtracks.ui.components.ContextMenuHost
 import com.subtracks.ui.components.CoverArt
 import com.subtracks.ui.components.ItemActions
@@ -108,6 +110,7 @@ fun HomeListRoute(
         genres = genres,
         decades = decades,
         coverArt = viewModel::coverArt,
+        artistArt = { viewModel.artistArt(it) },
         playingSongId = playback.item?.id,
         onBack = onBack,
         onAlbumClick = onAlbumClick,
@@ -133,6 +136,7 @@ fun HomeListScreen(
     genres: List<String> = emptyList(),
     decades: List<Long> = emptyList(),
     coverArt: (String?, Boolean) -> CoverArtRef? = { _, _ -> null },
+    artistArt: (Artist) -> ArtistArt = { ArtistArt() },
     playingSongId: String? = null,
     onBack: () -> Unit = {},
     onAlbumClick: (Album) -> Unit = {},
@@ -191,7 +195,7 @@ fun HomeListScreen(
                 OfflineListKind.Artists -> {
                     ArtistsList(
                         artists = artists,
-                        coverArt = coverArt,
+                        artistArt = artistArt,
                         info = { artistListInfo(request, it, now, resources) },
                         onArtistClick = onArtistClick,
                         onLongClick = onLongClick,
@@ -245,7 +249,7 @@ fun HomeListScreen(
                 HomeSection.RecentlyPlayedArtists, HomeSection.MostPlayedArtists -> {
                     ArtistsList(
                         artists = artists,
-                        coverArt = coverArt,
+                        artistArt = artistArt,
                         info = { artistListInfo(request, it, now, resources) },
                         onArtistClick = onArtistClick,
                         onLongClick = onLongClick,
@@ -443,7 +447,7 @@ internal fun AlbumListRow(
 @Composable
 private fun ArtistsList(
     artists: LazyPagingItems<Artist>,
-    coverArt: (String?, Boolean) -> CoverArtRef?,
+    artistArt: (Artist) -> ArtistArt,
     info: (Artist) -> String?,
     onArtistClick: (Artist) -> Unit,
     onLongClick: (MenuTarget) -> Unit,
@@ -460,12 +464,13 @@ private fun ArtistsList(
         items(count = artists.itemCount, key = artists.itemKey { it.id }) { index ->
             val artist = artists[index]
             if (artist != null) {
+                val art = artistArt(artist)
                 ArtistListRow(
                     artist = artist,
-                    coverArt = coverArt,
+                    art = art,
                     info = info(artist),
                     onClick = { onArtistClick(artist) },
-                    onLongClick = { onLongClick(MenuTarget.Artist(artist, coverArt(artist.coverArt, true))) },
+                    onLongClick = { onLongClick(MenuTarget.Artist(artist, art.primary)) },
                 )
             }
         }
@@ -475,7 +480,7 @@ private fun ArtistsList(
 @Composable
 internal fun ArtistListRow(
     artist: Artist,
-    coverArt: (String?, Boolean) -> CoverArtRef?,
+    art: ArtistArt,
     info: String?,
     onClick: () -> Unit,
     onLongClick: () -> Unit,
@@ -488,9 +493,9 @@ internal fun ArtistListRow(
                 .padding(horizontal = 16.dp, vertical = 8.dp),
         verticalAlignment = Alignment.CenterVertically,
     ) {
-        CoverArt(
-            ref = coverArt(artist.coverArt, true),
-            name = artist.name,
+        ArtistIcon(
+            artist = artist,
+            art = art,
             modifier = Modifier.size(ALBUM_ROW_COVER).clip(CircleShape),
         )
         Spacer(Modifier.width(12.dp))

app/src/main/kotlin/com/subtracks/ui/home/HomeListViewModel.kt

@@ -16,6 +16,8 @@ import com.subtracks.data.prefs.PlaylistSort
 import com.subtracks.data.repo.LibraryRepository
 import com.subtracks.data.repo.SourceRepository
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistArt
+import com.subtracks.ui.components.artistArt
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.SharingStarted
@@ -156,6 +158,11 @@ class HomeListViewModel(
         thumbnail: Boolean,
     ): CoverArtRef? = sourceRepository.coverArt(coverArt, thumbnail)
 
+    fun artistArt(
+        artist: Artist,
+        forIcon: Boolean = true,
+    ): ArtistArt = sourceRepository.artistArt(artist, forIcon)
+
     fun play(song: Song) {
         val genre = request.genre
         when {

app/src/main/kotlin/com/subtracks/ui/home/HomeScreen.kt

@@ -72,6 +72,8 @@ import com.subtracks.data.model.Playlist
 import com.subtracks.data.model.Song
 import com.subtracks.data.source.StarType
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistArt
+import com.subtracks.ui.components.ArtistIcon
 import com.subtracks.ui.components.ContextMenuHost
 import com.subtracks.ui.components.CoverArt
 import com.subtracks.ui.components.EmptyState
@@ -137,6 +139,7 @@ fun HomeRoute(
             playlists = viewModel.downloadedPlaylists.collectAsLazyPagingItems(),
             songs = viewModel.downloadedSongs.collectAsStateWithLifecycle(initialValue = emptyList()).value,
             coverArt = viewModel::coverArt,
+            artistArt = { viewModel.artistArt(it) },
             playingSongId = playback.item?.id,
             topInset = topInset,
             bottomInset = bottomInset,
@@ -152,6 +155,7 @@ fun HomeRoute(
         HomeScreen(
             feed = feed,
             coverArt = viewModel::coverArt,
+            artistArt = { viewModel.artistArt(it) },
             playingSongId = playback.item?.id,
             topInset = topInset,
             bottomInset = bottomInset,
@@ -173,6 +177,7 @@ fun HomeScreen(
     coverArt: (String?, Boolean) -> CoverArtRef?,
     playingSongId: String?,
     modifier: Modifier = Modifier,
+    artistArt: (Artist) -> ArtistArt = { ArtistArt() },
     topInset: Dp = 0.dp,
     bottomInset: Dp = 0.dp,
     onAlbumClick: (Album) -> Unit = {},
@@ -215,6 +220,7 @@ fun HomeScreen(
                 HomeSection.RecentlyPlayedArtists,
                 feed.recentlyPlayedArtists,
                 coverArt,
+                artistArt,
                 onArtistClick,
                 onLongClick,
                 onMore,
@@ -249,6 +255,7 @@ fun HomeScreen(
                 HomeSection.MostPlayedArtists,
                 feed.mostPlayedArtists,
                 coverArt,
+                artistArt,
                 onArtistClick,
                 onLongClick,
                 onMore,
@@ -296,6 +303,7 @@ fun OfflineHomeScreen(
     coverArt: (String?, Boolean) -> CoverArtRef?,
     playingSongId: String?,
     modifier: Modifier = Modifier,
+    artistArt: (Artist) -> ArtistArt = { ArtistArt() },
     topInset: Dp = 0.dp,
     bottomInset: Dp = 0.dp,
     onAlbumClick: (Album) -> Unit = {},
@@ -312,7 +320,7 @@ fun OfflineHomeScreen(
         ) {
             homeTitle()
             downloadedAlbumRow(albums, coverArt, onAlbumClick, onLongClick) { onMore(OfflineListKind.Albums) }
-            downloadedArtistRow(artists, coverArt, onArtistClick, onLongClick) { onMore(OfflineListKind.Artists) }
+            downloadedArtistRow(artists, artistArt, onArtistClick, onLongClick) { onMore(OfflineListKind.Artists) }
             downloadedPlaylistRow(playlists, coverArt, onPlaylistClick, onLongClick) { onMore(OfflineListKind.Playlists) }
             songList(
                 key = "downloaded-songs",
@@ -364,7 +372,7 @@ private fun LazyListScope.downloadedAlbumRow(
 
 private fun LazyListScope.downloadedArtistRow(
     artists: LazyPagingItems<Artist>,
-    coverArt: (String?, Boolean) -> CoverArtRef?,
+    artistArt: (Artist) -> ArtistArt,
     onArtistClick: (Artist) -> Unit,
     onLongClick: (MenuTarget) -> Unit,
     onMore: () -> Unit,
@@ -382,12 +390,12 @@ private fun LazyListScope.downloadedArtistRow(
             items(count = artists.itemCount, key = artists.itemKey { it.id }) { index ->
                 val artist = artists[index]
                 if (artist != null) {
-                    val ref = coverArt(artist.coverArt, true)
+                    val art = artistArt(artist)
                     ArtistTile(
                         artist = artist,
-                        ref = ref,
+                        art = art,
                         onClick = { onArtistClick(artist) },
-                        onLongClick = { onLongClick(MenuTarget.Artist(artist, ref)) },
+                        onLongClick = { onLongClick(MenuTarget.Artist(artist, art.primary)) },
                     )
                 }
             }
@@ -607,6 +615,7 @@ private fun LazyListScope.artistRow(
     section: HomeSection,
     artists: List<Artist>,
     coverArt: (String?, Boolean) -> CoverArtRef?,
+    artistArt: (Artist) -> ArtistArt,
     onArtistClick: (Artist) -> Unit,
     onLongClick: (MenuTarget) -> Unit,
     onMore: (HomeSection) -> Unit,
@@ -625,12 +634,12 @@ private fun LazyListScope.artistRow(
             modifier = Modifier.padding(top = SECTION_CONTENT_TOP),
         ) {
             items(artists, key = { it.id }) { artist ->
-                val ref = coverArt(artist.coverArt, true)
+                val art = artistArt(artist)
                 ArtistTile(
                     artist = artist,
-                    ref = ref,
+                    art = art,
                     onClick = { onArtistClick(artist) },
-                    onLongClick = { onLongClick(MenuTarget.Artist(artist, ref)) },
+                    onLongClick = { onLongClick(MenuTarget.Artist(artist, art.primary)) },
                 )
             }
         }
@@ -779,7 +788,7 @@ private fun AlbumTile(
 @Composable
 private fun ArtistTile(
     artist: Artist,
-    ref: CoverArtRef?,
+    art: ArtistArt,
     onClick: () -> Unit,
     onLongClick: () -> Unit,
 ) {
@@ -787,9 +796,9 @@ private fun ArtistTile(
         modifier = Modifier.width(ARTIST_TILE_SIZE).combinedClickable(onClick = onClick, onLongClick = onLongClick),
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
-        CoverArt(
-            ref = ref,
-            name = artist.name,
+        ArtistIcon(
+            artist = artist,
+            art = art,
             modifier = Modifier.size(ARTIST_TILE_SIZE).clip(CircleShape),
         )
         Spacer(Modifier.height(6.dp))

app/src/main/kotlin/com/subtracks/ui/home/HomeViewModel.kt

@@ -17,6 +17,8 @@ import com.subtracks.data.repo.rediscoverCutoff
 import com.subtracks.data.sync.SyncManager
 import com.subtracks.data.sync.SyncStatus
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistArt
+import com.subtracks.ui.components.artistArt
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
@@ -127,6 +129,11 @@ class HomeViewModel(
         thumbnail: Boolean,
     ): CoverArtRef? = sourceRepository.coverArt(coverArt, thumbnail)
 
+    fun artistArt(
+        artist: Artist,
+        forIcon: Boolean = true,
+    ): ArtistArt = sourceRepository.artistArt(artist, forIcon)
+
     fun playStarred(song: Song) {
         viewModelScope.playStarredList(libraryRepository, playbackController, song)
     }
@@ -213,7 +220,7 @@ internal fun CoroutineScope.playGenreList(
     song: Song,
 ) {
     launch {
-        val ordinal = libraryRepository.genreSongOrdinal(song.sourceId, genre, song.title, song.id)
+        val ordinal = libraryRepository.genreSongOrdinal(song.sourceId, genre, song.sortName, song.id)
         playbackController.playGenre(song.sourceId, genre, ordinal)
     }
 }

app/src/main/kotlin/com/subtracks/ui/library/AlbumDetailScreen.kt

@@ -16,7 +16,6 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -30,24 +29,26 @@ import com.subtracks.data.model.Album
 import com.subtracks.data.model.BulkDownloadAction
 import com.subtracks.data.model.CoverArtRef
 import com.subtracks.data.model.Disc
+import com.subtracks.data.model.DownloadList
 import com.subtracks.data.model.ListDownloadStatus
 import com.subtracks.data.model.QueueKind
 import com.subtracks.data.model.Song
 import com.subtracks.data.model.SongDownload
 import com.subtracks.data.source.StarType
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistChooserSheet
 import com.subtracks.ui.components.CloseWhenDownloadsGone
 import com.subtracks.ui.components.ContextMenuHost
-import com.subtracks.ui.components.DeleteDownloadsDialog
 import com.subtracks.ui.components.DismissOnRequest
 import com.subtracks.ui.components.HeroDetailScaffold
 import com.subtracks.ui.components.HeroHeader
 import com.subtracks.ui.components.ItemActions
 import com.subtracks.ui.components.MenuTarget
+import com.subtracks.ui.components.PendingDownloadDeleteConfirmation
+import com.subtracks.ui.components.rememberPendingDownloadDelete
 import com.subtracks.ui.theme.ArtworkColors
 import com.subtracks.ui.theme.rememberArtworkColors
 import kotlinx.coroutines.flow.emptyFlow
-import kotlinx.coroutines.launch
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
 import org.koin.core.parameter.parametersOf
@@ -66,24 +67,23 @@ fun AlbumDetailRoute(
     viewModel: AlbumDetailViewModel = koinViewModel(key = albumId) { parametersOf(albumId) },
     playbackController: PlaybackController = koinInject(),
 ) {
-    val album by viewModel.album.collectAsStateWithLifecycle(initialValue = null)
-    val songs by viewModel.songs.collectAsStateWithLifecycle(initialValue = emptyList())
-    val discs by viewModel.discs.collectAsStateWithLifecycle(initialValue = emptyList())
+    val album by viewModel.album.collectAsStateWithLifecycle()
+    val songs by viewModel.songs.collectAsStateWithLifecycle()
+    val discs by viewModel.discs.collectAsStateWithLifecycle()
     val downloads by viewModel.downloads.collectAsStateWithLifecycle()
     val downloadStatus by viewModel.downloadStatus.collectAsStateWithLifecycle()
     val offline by viewModel.offline.collectAsStateWithLifecycle()
     CloseWhenDownloadsGone(downloadStatus.downloaded, offline, onBack)
-    val scope = rememberCoroutineScope()
-    var pendingDelete by remember { mutableStateOf<Long?>(null) }
-    DismissOnRequest(contextMenuHost?.dismissals ?: emptyFlow()) { pendingDelete = null }
+    val dismissals = contextMenuHost?.dismissals ?: emptyFlow()
+    val pendingDelete = rememberPendingDownloadDelete(dismissals) { _, _ -> viewModel.downloadedBytes() }
+    var showArtistChooser by remember { mutableStateOf(false) }
+    DismissOnRequest(dismissals) { showArtistChooser = false }
     val playback by playbackController.state.collectAsStateWithLifecycle()
     val context = playback.context
     val shortcutArt = remember(coverArtId) { coverArtId?.let { viewModel.coverArt(it, true) } }
     val requestDownloadAction: (BulkDownloadAction) -> Unit = { action ->
-        if (action == BulkDownloadAction.Delete) {
-            scope.launch { pendingDelete = viewModel.downloadedBytes() }
-        } else {
-            viewModel.onDownloadAction(action)
+        pendingDelete.onAction(album?.name.orEmpty(), DownloadList.Album, albumId, action) { _, _, requested ->
+            viewModel.onDownloadAction(requested)
         }
     }
     val actions =
@@ -126,18 +126,28 @@ fun AlbumDetailRoute(
         },
         onArtistClick =
             album
-                ?.takeIf { !it.albumArtist.isNullOrBlank() }
-                ?.let { it.artistId }
-                ?.let { id -> { onViewArtist(id) } },
+                ?.takeIf { it.artistRefs.isNotEmpty() }
+                ?.let {
+                    {
+                        val artists = it.artistRefs
+                        if (artists.size == 1) onViewArtist(artists.first().id) else showArtistChooser = true
+                    }
+                },
         playingSongId = playback.item?.id.takeIf { context?.kind == QueueKind.Album && context.refId == albumId },
     )
 
-    pendingDelete?.let { bytes ->
-        DeleteDownloadsDialog(
-            name = album?.name.orEmpty(),
-            bytes = bytes,
-            onConfirm = { viewModel.onDownloadAction(BulkDownloadAction.Delete) },
-            onDismiss = { pendingDelete = null },
+    PendingDownloadDeleteConfirmation(pendingDelete) {
+        viewModel.onDownloadAction(BulkDownloadAction.Delete)
+    }
+
+    if (showArtistChooser) {
+        ArtistChooserSheet(
+            artists = album?.artistRefs.orEmpty(),
+            onArtistClick = { artist ->
+                showArtistChooser = false
+                onViewArtist(artist.id)
+            },
+            onDismiss = { showArtistChooser = false },
         )
     }
 }
@@ -195,6 +205,7 @@ fun AlbumDetailScreen(
         artwork = artwork,
         title = album?.name.orEmpty(),
         onBack = onBack,
+        contentReady = songs.isNotEmpty(),
         header = { controlsModifier, topInset ->
             val artistName = album?.albumArtist?.takeIf { it.isNotBlank() }
             HeroHeader(
@@ -215,6 +226,7 @@ fun AlbumDetailScreen(
                 onMore = onMore,
                 topInset = topInset,
                 controlsModifier = controlsModifier,
+                nameMaxLines = Int.MAX_VALUE,
             )
         },
         content = { rowModifier ->

app/src/main/kotlin/com/subtracks/ui/library/AlbumDetailViewModel.kt

@@ -15,7 +15,6 @@ import com.subtracks.data.repo.LibraryRepository
 import com.subtracks.data.repo.SourceRepository
 import com.subtracks.playback.PlaybackController
 import kotlinx.coroutines.ExperimentalCoroutinesApi
-import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
@@ -35,13 +34,20 @@ class AlbumDetailViewModel(
 ) : ViewModel() {
     private val sourceId = libraryRepository.activeSourceId.filterNotNull()
 
-    val album: Flow<Album?> = sourceId.flatMapLatest { libraryRepository.album(it, albumId) }
+    val album: StateFlow<Album?> =
+        sourceId
+            .flatMapLatest { libraryRepository.album(it, albumId) }
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), null)
 
-    val songs: Flow<List<Song>> =
+    val songs: StateFlow<List<Song>> =
         combine(sourceId, sourceRepository.offline) { id, offline -> id to offline }
             .flatMapLatest { (id, offline) -> libraryRepository.albumSongs(id, albumId, offline) }
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), emptyList())
 
-    val discs: Flow<List<Disc>> = sourceId.flatMapLatest { libraryRepository.albumDiscs(it, albumId) }
+    val discs: StateFlow<List<Disc>> =
+        sourceId
+            .flatMapLatest { libraryRepository.albumDiscs(it, albumId) }
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), emptyList())
 
     val downloads: StateFlow<Map<String, SongDownload>> = downloadRepository.states()
 

app/src/main/kotlin/com/subtracks/ui/library/ArtistDetailViewModel.kt

@@ -2,8 +2,9 @@ package com.subtracks.ui.library
 
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
-import com.subtracks.data.model.Album
 import com.subtracks.data.model.Artist
+import com.subtracks.data.model.ArtistAlbums
+import com.subtracks.data.model.ArtistBio
 import com.subtracks.data.model.BulkDownloadAction
 import com.subtracks.data.model.CoverArtRef
 import com.subtracks.data.model.DownloadList
@@ -12,9 +13,10 @@ import com.subtracks.data.repo.DownloadRepository
 import com.subtracks.data.repo.LibraryRepository
 import com.subtracks.data.repo.SourceRepository
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistArt
+import com.subtracks.ui.components.artistArt
 import kotlinx.coroutines.ExperimentalCoroutinesApi
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
@@ -36,21 +38,26 @@ class ArtistDetailViewModel(
 ) : ViewModel() {
     private val sourceId = libraryRepository.activeSourceId.filterNotNull()
 
-    val artist: Flow<Artist?> = sourceId.flatMapLatest { libraryRepository.artist(it, artistId) }
+    val artist: StateFlow<Artist?> =
+        sourceId
+            .flatMapLatest { libraryRepository.artist(it, artistId) }
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), null)
 
-    val artistName: Flow<String?> =
-        sourceId.flatMapLatest { id ->
-            combine(
-                libraryRepository.artist(id, artistId),
-                libraryRepository.artistName(id, artistId),
-            ) { loaded, fromSongs -> loaded?.name?.takeIf { it.isNotBlank() } ?: fromSongs }
-        }
+    val artistName: StateFlow<String?> =
+        sourceId
+            .flatMapLatest { id ->
+                combine(
+                    libraryRepository.artist(id, artistId),
+                    libraryRepository.artistName(id, artistId),
+                ) { loaded, fromSongs -> loaded?.name?.takeIf { it.isNotBlank() } ?: fromSongs }
+            }.stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), null)
 
     val offline: StateFlow<Boolean> = sourceRepository.offline
 
-    val albums: Flow<List<Album>> =
+    val albums: StateFlow<ArtistAlbums?> =
         combine(sourceId, sourceRepository.offline) { id, offline -> id to offline }
             .flatMapLatest { (id, offline) -> libraryRepository.artistAlbums(id, artistId, offline) }
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), null)
 
     val downloadStatus: StateFlow<ListDownloadStatus> =
         sourceId
@@ -62,6 +69,55 @@ class ArtistDetailViewModel(
             .flatMapLatest { downloadRepository.statuses(it, DownloadList.Album) }
             .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), emptyMap())
 
+    val artistBio: StateFlow<ArtistBio?> =
+        sourceId
+            .flatMapLatest { libraryRepository.artistBio(it, artistId) }
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), null)
+
+    private val _bioLoading = MutableStateFlow(true)
+    val bioLoading: StateFlow<Boolean> = _bioLoading
+
+    private val _bioUnavailable = MutableStateFlow(false)
+    val bioUnavailable: StateFlow<Boolean> = _bioUnavailable
+
+    private val _bioExpanded = MutableStateFlow(false)
+    val bioExpanded: StateFlow<Boolean> = _bioExpanded
+
+    private var bioRefresh: Job? = null
+
+    fun refreshBio() {
+        if (bioRefresh?.isActive == true) return
+        bioRefresh =
+            viewModelScope.launch {
+                _bioUnavailable.value = false
+                if (sourceRepository.offline.value) {
+                    _bioLoading.value = false
+                    _bioUnavailable.value = true
+                    return@launch
+                }
+                val id = sourceRepository.activeSourceIdOnce()
+                if (id == null) {
+                    _bioLoading.value = false
+                    _bioUnavailable.value = true
+                    return@launch
+                }
+                _bioLoading.value = true
+                try {
+                    _bioUnavailable.value = libraryRepository.refreshArtistBio(id, artistId).isFailure
+                } finally {
+                    _bioLoading.value = false
+                }
+            }
+    }
+
+    fun expandBio() {
+        _bioExpanded.value = true
+    }
+
+    fun collapseBio() {
+        _bioExpanded.value = false
+    }
+
     suspend fun downloadedBytes(
         list: DownloadList,
         refId: String,
@@ -84,30 +140,36 @@ class ArtistDetailViewModel(
     private val _artThumbnail = MutableStateFlow<CoverArtRef?>(null)
     val artThumbnail: StateFlow<CoverArtRef?> = _artThumbnail
 
+    private val _heroArt = MutableStateFlow<ArtistArt?>(null)
+    val heroArt: StateFlow<ArtistArt?> = _heroArt
+
     init {
         viewModelScope.launch {
-            artist
+            sourceRepository.activeSource
                 .filterNotNull()
-                .collectLatest { loaded ->
-                    val (full, thumbnail) = resolveArt(loaded)
-                    _art.value = full
-                    _artThumbnail.value = thumbnail
+                .flatMapLatest { sourceId ->
+                    combine(
+                        libraryRepository.artist(sourceId, artistId),
+                        libraryRepository.artistCoverArts(sourceId, artistId),
+                        sourceRepository.offline,
+                    ) { loaded, covers, offline -> ArtistArtInput(loaded, artistId, offline, sourceId, covers) }
+                }.collectLatest { input ->
+                    val resolved = resolveArtistArtInput(input)
+                    if (resolved == null) {
+                        _art.value = null
+                        _artThumbnail.value = null
+                        _heroArt.value = null
+                        return@collectLatest
+                    }
+                    val hero = sourceRepository.artistArt(resolved, forIcon = false)
+                    val icon = sourceRepository.artistArt(resolved, forIcon = true)
+                    _art.value = hero.image ?: hero.covers.firstOrNull()
+                    _artThumbnail.value = icon.image ?: icon.covers.firstOrNull()
+                    _heroArt.value = hero
                 }
         }
     }
 
-    private suspend fun resolveArt(artist: Artist): Pair<CoverArtRef?, CoverArtRef?> {
-        if (artist.coverArt == null) return null to null
-        repeat(3) { attempt ->
-            val full = sourceRepository.coverArt(artist.coverArt)
-            if (full != null) {
-                return full to sourceRepository.coverArt(artist.coverArt, thumbnail = true)
-            }
-            if (attempt < 2) delay(300)
-        }
-        return null to null
-    }
-
     fun coverArt(
         coverArt: String?,
         thumbnail: Boolean,
@@ -119,3 +181,35 @@ class ArtistDetailViewModel(
         }
     }
 }
+
+internal data class ArtistArtInput(
+    val artist: Artist?,
+    val artistId: String,
+    val offline: Boolean,
+    val sourceId: Long,
+    val covers: List<String>,
+)
+
+internal fun resolveArtistArtInput(input: ArtistArtInput): Artist? {
+    val artist = input.artist
+    if (input.covers.isEmpty()) return artist
+    if (artist == null) {
+        return Artist(
+            sourceId = input.sourceId,
+            id = input.artistId,
+            name = "",
+            albumCount = 0,
+            starred = null,
+            coverArts = input.covers,
+            downloadedCoverArts = if (input.offline) input.covers else emptyList(),
+        )
+    }
+    return if (input.offline) {
+        artist.copy(
+            coverArts = input.covers,
+            downloadedCoverArts = artist.downloadedCoverArts.ifEmpty { input.covers },
+        )
+    } else {
+        artist.copy(coverArts = input.covers)
+    }
+}

app/src/main/kotlin/com/subtracks/ui/library/ArtistsContent.kt

@@ -29,7 +29,8 @@ import com.subtracks.R
 import com.subtracks.data.model.Artist
 import com.subtracks.data.model.CoverArtRef
 import com.subtracks.data.model.ListDownloadStatus
-import com.subtracks.ui.components.CoverArt
+import com.subtracks.ui.components.ArtistArt
+import com.subtracks.ui.components.ArtistIcon
 import com.subtracks.ui.components.EmptyState
 import com.subtracks.ui.components.FilteredEmptyState
 import com.subtracks.ui.components.ListDownloadIndicator
@@ -55,6 +56,7 @@ fun ArtistsContent(
     onSync: () -> Unit = {},
     downloadStatuses: Map<String, ListDownloadStatus> = emptyMap(),
     scrollToTopKey: Any? = null,
+    artistArt: (Artist) -> ArtistArt = { ArtistArt() },
 ) {
     when {
         items.itemCount == 0 && items.loadState.refresh is LoadState.Loading -> {
@@ -82,7 +84,8 @@ fun ArtistsContent(
                 items(count = items.itemCount, key = items.itemKey { it.id }) { index ->
                     val artist = items[index]
                     if (artist != null) {
-                        PrefetchArtworkSeeds(coverArt(artist.coverArt, true))
+                        val art = artistArt(artist)
+                        PrefetchArtworkSeeds(art.primary)
                         ListItem(
                             headlineContent = {
                                 Text(
@@ -104,9 +107,9 @@ fun ArtistsContent(
                                 )
                             },
                             leadingContent = {
-                                CoverArt(
-                                    ref = coverArt(artist.coverArt, true),
-                                    name = artist.name,
+                                ArtistIcon(
+                                    artist = artist,
+                                    art = art,
                                     modifier = Modifier.size(48.dp).clip(CircleShape),
                                 )
                             },
@@ -117,7 +120,7 @@ fun ArtistsContent(
                                 Modifier.combinedClickable(
                                     onClick = { onArtistClick(artist) },
                                     onLongClick = {
-                                        onLongClick(MenuTarget.Artist(artist, coverArt(artist.coverArt, true), downloadStatuses[artist.id]))
+                                        onLongClick(MenuTarget.Artist(artist, art.primary, downloadStatuses[artist.id]))
                                     },
                                 ),
                             colors = ListItemDefaults.colors(containerColor = Color.Transparent),

app/src/main/kotlin/com/subtracks/ui/library/LibraryScreen.kt

@@ -1,10 +1,12 @@
 package com.subtracks.ui.library
 
+import androidx.activity.compose.BackHandler
 import androidx.annotation.StringRes
 import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.Canvas
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -24,6 +26,7 @@ import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.pager.HorizontalPager
 import androidx.compose.foundation.pager.PagerState
 import androidx.compose.foundation.pager.rememberPagerState
+import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
@@ -42,6 +45,7 @@ import androidx.compose.material.icons.rounded.Search
 import androidx.compose.material.icons.rounded.Settings
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FilledTonalIconButton
 import androidx.compose.material3.FilterChip
 import androidx.compose.material3.FilterChipDefaults
 import androidx.compose.material3.FloatingActionButton
@@ -64,13 +68,11 @@ import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateMapOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.clipToBounds
 import androidx.compose.ui.draw.drawBehind
 import androidx.compose.ui.draw.drawWithContent
@@ -92,12 +94,15 @@ import androidx.compose.ui.layout.layout
 import androidx.compose.ui.layout.onGloballyPositioned
 import androidx.compose.ui.layout.onSizeChanged
 import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.platform.LocalFocusManager
+import androidx.compose.ui.platform.LocalLayoutDirection
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.clearAndSetSemantics
 import androidx.compose.ui.semantics.contentDescription
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.unit.Constraints
 import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.LayoutDirection
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.paging.PagingData
@@ -118,14 +123,14 @@ import com.subtracks.data.prefs.PlaylistSort
 import com.subtracks.data.prefs.StarredFilter
 import com.subtracks.data.source.StarType
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistArt
 import com.subtracks.ui.components.ContextMenuHost
-import com.subtracks.ui.components.DeleteDownloadsDialog
 import com.subtracks.ui.components.DismissOnRequest
 import com.subtracks.ui.components.ItemActions
 import com.subtracks.ui.components.MenuTarget
-import com.subtracks.ui.components.PendingDownloadDelete
+import com.subtracks.ui.components.PendingDownloadDeleteConfirmation
 import com.subtracks.ui.components.SearchField
-import com.subtracks.ui.components.bulkRef
+import com.subtracks.ui.components.rememberPendingDownloadDelete
 import com.subtracks.ui.components.statusBarScrim
 import com.subtracks.ui.home.HomeRoute
 import com.subtracks.ui.home.HomeSection
@@ -136,7 +141,6 @@ import com.subtracks.ui.theme.playerSurfaceColor
 import com.subtracks.ui.theme.rememberArtworkColors
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.emptyFlow
-import kotlinx.coroutines.launch
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
 import kotlin.math.abs
@@ -271,25 +275,13 @@ fun LibraryRoute(
     val artwork = rememberArtworkColors(playbackController.coverArt(playback.item, thumbnail = true), fallbackName = playback.item?.title)
     val downloadsState = listTab?.let { viewModel.downloads(it).collectAsStateWithLifecycle() }
     val downloads = downloadsState?.value ?: emptyMap()
-    val scope = rememberCoroutineScope()
-    var pendingDelete by remember { mutableStateOf<PendingDownloadDelete?>(null) }
-    DismissOnRequest(contextMenuHost?.dismissals ?: emptyFlow()) { pendingDelete = null }
+    val focusManager = LocalFocusManager.current
+    val pendingDelete = rememberPendingDownloadDelete(contextMenuHost?.dismissals ?: emptyFlow(), viewModel::downloadedBytes)
     val itemActions =
         ItemActions(
             playNext = { playbackController.playNext(it.sourceId, it.kind, it.refId) },
             addToQueue = { playbackController.addToQueue(it.sourceId, it.kind, it.refId) },
-            bulkDownload = { target, action ->
-                target.bulkRef()?.let { (list, refId) ->
-                    if (action == BulkDownloadAction.Delete) {
-                        scope.launch {
-                            pendingDelete =
-                                PendingDownloadDelete(target.title, list, refId, viewModel.downloadedBytes(list, refId))
-                        }
-                    } else {
-                        viewModel.onDownloadAction(list, refId, action)
-                    }
-                }
-            },
+            bulkDownload = { target, action -> pendingDelete.onAction(target, action, viewModel::onDownloadAction) },
             setStar = setStar,
             viewAlbum = onViewAlbum,
             viewArtist = onViewArtist,
@@ -305,13 +297,17 @@ fun LibraryRoute(
         artists = viewModel.artists,
         playlists = viewModel.playlists,
         coverArt = viewModel::coverArt,
+        artistArt = { viewModel.artistArt(it) },
         onAlbumClick = onAlbumClick,
         onArtistClick = onArtistClick,
         onPlaylistClick = onPlaylistClick,
         onSync = viewModel::sync,
         onOpenSettings = onOpenSettings,
         onOpenSearch = onOpenSearch,
-        onItemLongClick = { contextMenuHost?.show(it, itemActions) },
+        onItemLongClick = {
+            focusManager.clearFocus()
+            contextMenuHost?.show(it, itemActions)
+        },
         listQuery = displayQuery,
         resetKeys = resetKeys,
         offline = offline,
@@ -365,13 +361,8 @@ fun LibraryRoute(
         },
     )
 
-    pendingDelete?.let { pending ->
-        DeleteDownloadsDialog(
-            name = pending.name,
-            bytes = pending.bytes,
-            onConfirm = { viewModel.onDownloadAction(pending.list, pending.refId, BulkDownloadAction.Delete) },
-            onDismiss = { pendingDelete = null },
-        )
+    PendingDownloadDeleteConfirmation(pendingDelete) { pending ->
+        viewModel.onDownloadAction(pending.list, pending.refId, BulkDownloadAction.Delete)
     }
 }
 
@@ -390,6 +381,7 @@ fun LibraryScreen(
     onSync: () -> Unit,
     onOpenSettings: () -> Unit,
     modifier: Modifier = Modifier,
+    artistArt: (Artist) -> ArtistArt = { ArtistArt() },
     onOpenSearch: () -> Unit = {},
     offline: Boolean = false,
     onExitOffline: () -> Unit = {},
@@ -424,9 +416,14 @@ fun LibraryScreen(
     var searchActive by rememberSaveable { mutableStateOf(false) }
     var topRequest by remember { mutableIntStateOf(0) }
     val searchFocus = remember { FocusRequester() }
+    val closeSearch = {
+        searchActive = false
+        onSearchChange("")
+    }
 
     // Search mode is left open so the typed query survives; MainNavigation dismisses the keyboard.
     DismissOnRequest(dismissals) { showOptions = false }
+    BackHandler(enabled = searchActive, onBack = closeSearch)
 
     LaunchedEffect(pagerState) {
         snapshotFlow { pagerState.settledPage }.collect { page ->
@@ -445,14 +442,8 @@ fun LibraryScreen(
         }
     }
 
-    fun dismissSearch() {
-        if (searchActive) {
-            searchActive = false
-            onSearchChange("")
-        }
-    }
-
     val density = LocalDensity.current
+    val focusManager = LocalFocusManager.current
     val statusBarTop = with(density) { WindowInsets.statusBars.getTop(this).toDp() }
     val filtersActive = listQuery.starred != StarredFilter.Any || listQuery.downloaded || search.isNotEmpty()
     var tabBarHeightPx by remember { mutableFloatStateOf(with(density) { (TAB_BAR_CONTENT_HEIGHT + bottomInset).toPx() }) }
@@ -503,7 +494,7 @@ fun LibraryScreen(
                             coverArt,
                             listBottomInset,
                             {
-                                dismissSearch()
+                                focusManager.clearFocus()
                                 onAlbumClick(it)
                             },
                             onLongClick = onItemLongClick,
@@ -523,7 +514,7 @@ fun LibraryScreen(
                             coverArt,
                             listBottomInset,
                             {
-                                dismissSearch()
+                                focusManager.clearFocus()
                                 onArtistClick(it)
                             },
                             onLongClick = onItemLongClick,
@@ -534,6 +525,7 @@ fun LibraryScreen(
                             onSync = onSync,
                             downloadStatuses = artistDownloads,
                             scrollToTopKey = scrollToTopKey,
+                            artistArt = artistArt,
                         )
                     }
 
@@ -543,7 +535,7 @@ fun LibraryScreen(
                             coverArt,
                             listBottomInset,
                             {
-                                dismissSearch()
+                                focusManager.clearFocus()
                                 onPlaylistClick(it)
                             },
                             onLongClick = onItemLongClick,
@@ -583,8 +575,6 @@ fun LibraryScreen(
                         if (tab == selectedTab) topRequest++ else onTabSelected(tab)
                     },
                     onOpenSettings = onOpenSettings,
-                    offline = offline,
-                    onExitOffline = onExitOffline,
                     artwork = artwork,
                     syncing = syncing,
                 )
@@ -595,10 +585,7 @@ fun LibraryScreen(
             SearchField(
                 value = search,
                 onValueChange = onSearchChange,
-                onClose = {
-                    searchActive = false
-                    onSearchChange("")
-                },
+                onClose = closeSearch,
                 focusRequester = searchFocus,
                 modifier =
                     Modifier
@@ -609,11 +596,29 @@ fun LibraryScreen(
         }
 
         if (!searchActive) {
+            val fabContainerColor = artwork?.scheme?.primary ?: MaterialTheme.colorScheme.surfaceContainerHigh
+            val fabContentColor = artwork?.scheme?.onPrimary ?: MaterialTheme.colorScheme.onBackground
+            if (offline) {
+                FilledTonalIconButton(
+                    onClick = onExitOffline,
+                    modifier =
+                        Modifier
+                            .align(Alignment.BottomStart)
+                            .padding(start = 16.dp, bottom = tabBarHeight + 16.dp)
+                            .size(48.dp),
+                ) {
+                    Icon(
+                        imageVector = Icons.Rounded.CloudOff,
+                        contentDescription = stringResource(R.string.offline_mode_status),
+                        modifier = Modifier.size(24.dp).offset(y = (-0.75).dp),
+                    )
+                }
+            }
             val searchFab = selectedTab == LibraryTab.Home
             FloatingActionButton(
                 onClick = { if (searchFab) onOpenSearch() else showOptions = true },
-                containerColor = artwork?.scheme?.primary ?: MaterialTheme.colorScheme.surfaceContainerHigh,
-                contentColor = artwork?.scheme?.onPrimary ?: MaterialTheme.colorScheme.onBackground,
+                containerColor = fabContainerColor,
+                contentColor = fabContentColor,
                 elevation = FloatingActionButtonDefaults.elevation(defaultElevation = 12.dp),
                 modifier = Modifier.align(Alignment.BottomEnd).padding(end = 16.dp, bottom = tabBarHeight + 16.dp),
             ) {
@@ -632,11 +637,18 @@ fun LibraryScreen(
                                 modifier =
                                     Modifier
                                         .align(Alignment.TopEnd)
-                                        .offset(x = 4.dp, y = (-4).dp)
-                                        .size(8.dp)
-                                        .clip(CircleShape)
-                                        .background(artwork?.scheme?.onPrimary ?: MaterialTheme.colorScheme.primary),
-                            )
+                                        .offset(x = 1.dp, y = 2.5.dp)
+                                        .size(11.dp)
+                                        .background(fabContainerColor, CircleShape),
+                                contentAlignment = Alignment.Center,
+                            ) {
+                                Box(
+                                    modifier =
+                                        Modifier
+                                            .size(7.dp)
+                                            .background(fabContentColor, CircleShape),
+                                )
+                            }
                         }
                     }
                 }
@@ -696,7 +708,7 @@ private fun ListOptionsSheet(
             Row(
                 verticalAlignment = Alignment.CenterVertically,
                 horizontalArrangement = Arrangement.spacedBy(12.dp),
-                modifier = Modifier.padding(horizontal = 16.dp, vertical = 14.dp),
+                modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp),
             ) {
                 Icon(Icons.Rounded.Search, contentDescription = null, tint = MaterialTheme.colorScheme.onSurfaceVariant)
                 Text(stringResource(R.string.search_this_list), color = MaterialTheme.colorScheme.onSurfaceVariant)
@@ -818,6 +830,7 @@ private fun ListOptionsSheet(
 
 private val BOTTOM_CLEARANCE = 80.dp
 private val TAB_BAR_CONTENT_HEIGHT = 52.dp
+private val TAB_STRIP_LEADING_GAP = 8.dp
 private val TAB_ICON_SIZE = 24.dp
 private val TAB_VERTICAL_PADDING = 6.dp
 private val TOUCH_TARGET = 48.dp
@@ -850,13 +863,12 @@ internal fun LibraryTabs(
     pagerState: PagerState,
     onTabSelected: (LibraryTab) -> Unit,
     onOpenSettings: () -> Unit,
-    offline: Boolean = false,
-    onExitOffline: () -> Unit = {},
     artwork: ArtworkColors?,
     syncing: Boolean = false,
 ) {
     val indicatorStretch = 18.dp
     val density = LocalDensity.current
+    val layoutDirection = LocalLayoutDirection.current
     val bounds = remember { mutableStateMapOf<Int, Rect>() }
     val page = pagerState.currentPage
     val fraction = pagerState.currentPageOffsetFraction
@@ -888,79 +900,113 @@ internal fun LibraryTabs(
     val indicatorColor = artwork?.scheme?.primary ?: MaterialTheme.colorScheme.onBackground
     val tabContentHeightPx = with(density) { (TAB_ICON_SIZE + TAB_VERTICAL_PADDING * 2).toPx() }
 
+    val scrollState = rememberScrollState()
+    var viewportWidth by remember { mutableIntStateOf(0) }
+    var contentWidth by remember { mutableIntStateOf(0) }
+    var revealed by remember { mutableStateOf(false) }
+    val leadingGap = with(density) { TAB_STRIP_LEADING_GAP.toPx() }
+    LaunchedEffect(pagerState.settledPage, viewportWidth, contentWidth, layoutDirection, bounds[pagerState.settledPage]) {
+        if (viewportWidth == 0) return@LaunchedEffect
+        val settled = bounds[pagerState.settledPage] ?: return@LaunchedEffect
+        val start = if (layoutDirection == LayoutDirection.Rtl) contentWidth - settled.right else leadingGap + settled.left
+        val end = if (layoutDirection == LayoutDirection.Rtl) contentWidth - settled.left else leadingGap + settled.right
+        val target =
+            when {
+                start - leadingGap < scrollState.value -> start - leadingGap
+                end > scrollState.value + viewportWidth -> end - viewportWidth
+                else -> null
+            }
+        if (target != null) {
+            val offset = target.roundToInt().coerceIn(0, scrollState.maxValue)
+            if (revealed) scrollState.animateScrollTo(offset) else scrollState.scrollTo(offset)
+        }
+        revealed = true
+    }
+
     Box(Modifier.fillMaxWidth()) {
         Box(
             modifier =
                 Modifier
                     .fillMaxWidth()
                     .background(headerColor)
-                    .padding(horizontal = 8.dp, vertical = 2.dp),
+                    .padding(top = 2.dp, end = 8.dp, bottom = 2.dp),
         ) {
-            Box(
-                modifier =
-                    Modifier.drawBehind {
-                        if (current != null && indicatorLeft != null && indicatorRight != null && indicatorRight > indicatorLeft) {
-                            val height = tabContentHeightPx.coerceAtMost(current.height)
-                            drawRoundRect(
-                                color = indicatorColor,
-                                topLeft = Offset(indicatorLeft, current.top + (current.height - height) / 2f),
-                                size = Size(indicatorRight - indicatorLeft, height),
-                                cornerRadius = CornerRadius(8.dp.toPx()),
-                            )
-                        }
-                    },
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.spacedBy(4.dp),
             ) {
                 Row(
-                    modifier = Modifier.fillMaxWidth(),
+                    modifier =
+                        Modifier
+                            .weight(1f)
+                            .onSizeChanged { viewportWidth = it.width }
+                            .horizontalScroll(scrollState)
+                            .onSizeChanged { contentWidth = it.width },
                     verticalAlignment = Alignment.CenterVertically,
-                    horizontalArrangement = Arrangement.spacedBy(4.dp),
                 ) {
-                    LibraryTab.entries.forEachIndexed { index, tab ->
-                        TabButton(
-                            tab = tab,
-                            artwork = artwork,
-                            progress =
-                                when (index) {
-                                    page -> 1f - transition
-                                    page + (if (fraction >= 0f) 1 else -1) -> transition
-                                    else -> 0f
+                    Spacer(Modifier.width(TAB_STRIP_LEADING_GAP))
+                    Box(
+                        modifier =
+                            Modifier
+                                .drawBehind {
+                                    if (current != null &&
+                                        indicatorLeft != null &&
+                                        indicatorRight != null &&
+                                        indicatorRight > indicatorLeft
+                                    ) {
+                                        val height = tabContentHeightPx.coerceAtMost(current.height)
+                                        drawRoundRect(
+                                            color = indicatorColor,
+                                            topLeft = Offset(indicatorLeft, current.top + (current.height - height) / 2f),
+                                            size = Size(indicatorRight - indicatorLeft, height),
+                                            cornerRadius = CornerRadius(8.dp.toPx()),
+                                        )
+                                    }
                                 },
-                            indicatorLeft = indicatorLeft,
-                            indicatorRight = indicatorRight,
-                            onClick = { onTabSelected(tab) },
-                            modifier =
-                                Modifier.onGloballyPositioned { coordinates ->
-                                    bounds[index] = coordinates.boundsInParent()
-                                },
-                        )
-                    }
-                    Spacer(Modifier.weight(1f))
-                    if (offline) {
-                        IconButton(onClick = onExitOffline) {
-                            Icon(
-                                imageVector = Icons.Rounded.CloudOff,
-                                contentDescription = stringResource(R.string.offline_mode_status),
-                                tint = MaterialTheme.colorScheme.onBackground,
-                            )
-                        }
-                    }
-                    IconButton(onClick = onOpenSettings) {
-                        Box(contentAlignment = Alignment.Center) {
-                            Icon(
-                                imageVector = Icons.Rounded.Settings,
-                                contentDescription = stringResource(R.string.navigation_tabs_settings),
-                                tint = MaterialTheme.colorScheme.onBackground,
-                            )
-                            if (syncing) {
-                                CircularProgressIndicator(
-                                    modifier = Modifier.size(32.dp),
-                                    strokeWidth = 2.dp,
-                                    color = MaterialTheme.colorScheme.primary,
+                    ) {
+                        Row(
+                            verticalAlignment = Alignment.CenterVertically,
+                            horizontalArrangement = Arrangement.spacedBy(4.dp),
+                        ) {
+                            LibraryTab.entries.forEachIndexed { index, tab ->
+                                TabButton(
+                                    tab = tab,
+                                    artwork = artwork,
+                                    progress =
+                                        when (index) {
+                                            page -> 1f - transition
+                                            page + (if (fraction >= 0f) 1 else -1) -> transition
+                                            else -> 0f
+                                        },
+                                    indicatorLeft = indicatorLeft,
+                                    indicatorRight = indicatorRight,
+                                    onClick = { onTabSelected(tab) },
+                                    modifier =
+                                        Modifier.onGloballyPositioned { coordinates ->
+                                            bounds[index] = coordinates.boundsInParent()
+                                        },
                                 )
                             }
                         }
                     }
                 }
+                IconButton(onClick = onOpenSettings) {
+                    Box(contentAlignment = Alignment.Center) {
+                        Icon(
+                            imageVector = Icons.Rounded.Settings,
+                            contentDescription = stringResource(R.string.navigation_tabs_settings),
+                            tint = MaterialTheme.colorScheme.onBackground,
+                        )
+                        if (syncing) {
+                            CircularProgressIndicator(
+                                modifier = Modifier.size(32.dp),
+                                strokeWidth = 2.dp,
+                                color = MaterialTheme.colorScheme.primary,
+                            )
+                        }
+                    }
+                }
             }
         }
     }

app/src/main/kotlin/com/subtracks/ui/library/LibraryViewModel.kt

@@ -23,6 +23,8 @@ import com.subtracks.data.repo.SourceRepository
 import com.subtracks.data.sync.SyncManager
 import com.subtracks.data.sync.SyncStatus
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistArt
+import com.subtracks.ui.components.artistArt
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -211,6 +213,11 @@ class LibraryViewModel(
         thumbnail: Boolean,
     ): CoverArtRef? = sourceRepository.coverArt(coverArt, thumbnail)
 
+    fun artistArt(
+        artist: Artist,
+        forIcon: Boolean = true,
+    ): ArtistArt = sourceRepository.artistArt(artist, forIcon)
+
     fun sync() {
         if (syncManager.status.value !is SyncStatus.Running) syncManager.requestSync()
     }

app/src/main/kotlin/com/subtracks/ui/library/PlaylistDetailScreen.kt

@@ -7,7 +7,6 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
@@ -18,6 +17,7 @@ import androidx.paging.compose.itemKey
 import com.subtracks.R
 import com.subtracks.data.model.BulkDownloadAction
 import com.subtracks.data.model.CoverArtRef
+import com.subtracks.data.model.DownloadList
 import com.subtracks.data.model.ListDownloadStatus
 import com.subtracks.data.model.Playlist
 import com.subtracks.data.model.PlaylistSongItem
@@ -27,16 +27,16 @@ import com.subtracks.data.source.StarType
 import com.subtracks.playback.PlaybackController
 import com.subtracks.ui.components.CloseWhenDownloadsGone
 import com.subtracks.ui.components.ContextMenuHost
-import com.subtracks.ui.components.DeleteDownloadsDialog
 import com.subtracks.ui.components.DismissOnRequest
 import com.subtracks.ui.components.HeroDetailScaffold
 import com.subtracks.ui.components.HeroHeader
 import com.subtracks.ui.components.ItemActions
 import com.subtracks.ui.components.MenuTarget
+import com.subtracks.ui.components.PendingDownloadDeleteConfirmation
+import com.subtracks.ui.components.rememberPendingDownloadDelete
 import com.subtracks.ui.theme.ArtworkColors
 import com.subtracks.ui.theme.rememberArtworkColors
 import kotlinx.coroutines.flow.emptyFlow
-import kotlinx.coroutines.launch
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
 import org.koin.core.parameter.parametersOf
@@ -55,21 +55,17 @@ fun PlaylistDetailRoute(
     viewModel: PlaylistDetailViewModel = koinViewModel(key = playlistId) { parametersOf(playlistId) },
     playbackController: PlaybackController = koinInject(),
 ) {
-    val playlist by viewModel.playlist.collectAsStateWithLifecycle(initialValue = null)
+    val playlist by viewModel.playlist.collectAsStateWithLifecycle()
     val downloads by viewModel.downloads.collectAsStateWithLifecycle()
     val downloadStatus by viewModel.downloadStatus.collectAsStateWithLifecycle()
     val offline by viewModel.offline.collectAsStateWithLifecycle()
     CloseWhenDownloadsGone(downloadStatus.downloaded, offline, onBack)
-    val scope = rememberCoroutineScope()
-    var pendingDelete by remember { mutableStateOf<Long?>(null) }
-    DismissOnRequest(contextMenuHost?.dismissals ?: emptyFlow()) { pendingDelete = null }
+    val pendingDelete = rememberPendingDownloadDelete(contextMenuHost?.dismissals ?: emptyFlow()) { _, _ -> viewModel.downloadedBytes() }
     val playback by playbackController.state.collectAsStateWithLifecycle()
     val context = playback.context
     val requestDownloadAction: (BulkDownloadAction) -> Unit = { action ->
-        if (action == BulkDownloadAction.Delete) {
-            scope.launch { pendingDelete = viewModel.downloadedBytes() }
-        } else {
-            viewModel.onDownloadAction(action)
+        pendingDelete.onAction(playlist?.name.orEmpty(), DownloadList.Playlist, playlistId, action) { _, _, requested ->
+            viewModel.onDownloadAction(requested)
         }
     }
     val actions =
@@ -104,13 +100,8 @@ fun PlaylistDetailRoute(
         playingSongId = playback.item?.id.takeIf { context?.kind == QueueKind.Playlist && context.refId == playlistId },
     )
 
-    pendingDelete?.let { bytes ->
-        DeleteDownloadsDialog(
-            name = playlist?.name.orEmpty(),
-            bytes = bytes,
-            onConfirm = { viewModel.onDownloadAction(BulkDownloadAction.Delete) },
-            onDismiss = { pendingDelete = null },
-        )
+    PendingDownloadDeleteConfirmation(pendingDelete) {
+        viewModel.onDownloadAction(BulkDownloadAction.Delete)
     }
 }
 
@@ -138,6 +129,7 @@ fun PlaylistDetailScreen(
         artwork = artwork,
         title = playlist?.name.orEmpty(),
         onBack = onBack,
+        contentReady = songs.itemCount > 0,
         header = { controlsModifier, topInset ->
             HeroHeader(
                 art = coverArt(playlist?.coverArt, false),

app/src/main/kotlin/com/subtracks/ui/library/PlaylistDetailViewModel.kt

@@ -37,7 +37,10 @@ class PlaylistDetailViewModel(
 ) : ViewModel() {
     private val sourceId = libraryRepository.activeSourceId.filterNotNull()
 
-    val playlist: Flow<Playlist?> = sourceId.flatMapLatest { libraryRepository.playlist(it, playlistId) }
+    val playlist: StateFlow<Playlist?> =
+        sourceId
+            .flatMapLatest { libraryRepository.playlist(it, playlistId) }
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), null)
 
     val songs: Flow<PagingData<PlaylistSongItem>> =
         combine(sourceId, sourceRepository.offline) { id, offline -> id to offline }

app/src/main/kotlin/com/subtracks/ui/library/SongsContent.kt

@@ -61,6 +61,7 @@ import com.subtracks.data.model.DownloadStatus
 import com.subtracks.data.model.Song
 import com.subtracks.data.model.SongDownload
 import com.subtracks.ui.components.CoverArt
+import com.subtracks.ui.components.artistSubtitle
 
 private val TRACK_COLUMN_WIDTH = 24.dp
 private val TIME_COLUMN_WIDTH = 36.dp
@@ -146,7 +147,7 @@ fun SongRow(
         },
         supportingContent = {
             Text(
-                text = song.artist.orEmpty().ifEmpty { "\u00A0" },
+                text = song.artistSubtitle().orEmpty().ifEmpty { "\u00A0" },
                 color = if (isPlaying) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.onSurfaceVariant,
                 maxLines = 1,
                 overflow = TextOverflow.Ellipsis,

app/src/main/kotlin/com/subtracks/ui/playback/MiniPlayer.kt

@@ -44,6 +44,7 @@ import com.subtracks.R
 import com.subtracks.data.model.CoverArtRef
 import com.subtracks.playback.PlaybackState
 import com.subtracks.ui.components.CoverArt
+import com.subtracks.ui.components.artistSubtitle
 import com.subtracks.ui.theme.ArtworkColors
 import com.subtracks.ui.theme.ArtworkTheme
 import com.subtracks.ui.theme.playerSurfaceColor
@@ -139,7 +140,7 @@ fun MiniPlayer(
                             modifier = Modifier.basicMarquee(),
                         )
                         Text(
-                            text = item.artist ?: item.album.orEmpty(),
+                            text = artistSubtitle(item.artist, item.artists) ?: item.album.orEmpty(),
                             style = MaterialTheme.typography.bodySmall,
                             color = MaterialTheme.colorScheme.onSurfaceVariant,
                             maxLines = 1,

app/src/main/kotlin/com/subtracks/ui/playback/NowPlayingScreen.kt

@@ -85,10 +85,12 @@ import com.subtracks.playback.PlaybackController
 import com.subtracks.playback.PlaybackState
 import com.subtracks.playback.QueueItem
 import com.subtracks.playback.RepeatMode
+import com.subtracks.ui.components.ArtistChooserSheet
 import com.subtracks.ui.components.ContextMenuHost
 import com.subtracks.ui.components.CoverArt
 import com.subtracks.ui.components.ItemActions
 import com.subtracks.ui.components.MenuTarget
+import com.subtracks.ui.components.artistSubtitle
 import com.subtracks.ui.components.prefetchArtworkRatio
 import com.subtracks.ui.theme.ArtworkColors
 import com.subtracks.ui.theme.ArtworkSeedCache
@@ -203,6 +205,8 @@ fun NowPlayingRoute(
     val downloads by downloadRepository.states().collectAsStateWithLifecycle()
     val download = songId?.let { downloads[it] }
     val scope = rememberCoroutineScope()
+    var showArtistChooser by remember { mutableStateOf(false) }
+    LaunchedEffect(songId) { showArtistChooser = false }
     val song by
         produceState<Song?>(null, sourceId, songId) {
             if (sourceId != null && songId != null) {
@@ -241,7 +245,7 @@ fun NowPlayingRoute(
             name = item.title,
         )
     var adjacent by remember { mutableStateOf(AdjacentArt()) }
-    LaunchedEffect(state.item?.id, state.layout) {
+    LaunchedEffect(state.item?.id, state.layout, state.repeat) {
         if (state.item == null) {
             adjacent = AdjacentArt()
             return@LaunchedEffect
@@ -272,13 +276,32 @@ fun NowPlayingRoute(
         onRepeat = controller::cycleRepeat,
         onMore = { song?.let { contextMenuHost?.show(MenuTarget.Song(it, thumbnail, download), actions) } },
         onAlbumClick = song?.albumId?.let { id -> { onViewAlbum(id) } },
-        onArtistClick = song?.artistId?.let { id -> { onViewArtist(id) } },
+        onArtistClick =
+            song
+                ?.takeIf { it.artistRefs.isNotEmpty() }
+                ?.let {
+                    {
+                        val artists = it.artistRefs
+                        if (artists.size == 1) onViewArtist(artists.first().id) else showArtistChooser = true
+                    }
+                },
         starred = song?.starred != null,
         onToggleStar = song?.let { s -> { setStar(StarType.Song, s.id, s.starred == null) } },
         onSeek = controller::seekTo,
         keepScreenOn = keepScreenOn,
         modifier = modifier,
     )
+
+    if (showArtistChooser) {
+        ArtistChooserSheet(
+            artists = song?.artistRefs.orEmpty(),
+            onArtistClick = { artist ->
+                showArtistChooser = false
+                onViewArtist(artist.id)
+            },
+            onDismiss = { showArtistChooser = false },
+        )
+    }
 }
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -554,7 +577,10 @@ fun NowPlayingScreen(
                                 }
                                 Box(Modifier.height(subtitleHeight), contentAlignment = Alignment.CenterStart) {
                                     Text(
-                                        text = state.item?.artist.orEmpty(),
+                                        text =
+                                            state.item
+                                                ?.let { artistSubtitle(it.artist, it.artists) }
+                                                .orEmpty(),
                                         style = subtitleStyle,
                                         color = MaterialTheme.colorScheme.onSurfaceVariant,
                                         maxLines = 1,

app/src/main/kotlin/com/subtracks/ui/search/SearchScreen.kt

@@ -32,6 +32,7 @@ import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
@@ -45,6 +46,7 @@ import com.subtracks.data.model.Playlist
 import com.subtracks.data.model.Song
 import com.subtracks.data.source.StarType
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistArt
 import com.subtracks.ui.components.ContextMenuHost
 import com.subtracks.ui.components.EmptyState
 import com.subtracks.ui.components.ItemActions
@@ -85,6 +87,7 @@ fun SearchRoute(
     val query by viewModel.query.collectAsStateWithLifecycle()
     val results by viewModel.results.collectAsStateWithLifecycle()
     val playback by playbackController.state.collectAsStateWithLifecycle()
+    val focusManager = LocalFocusManager.current
     var filterMask by rememberSaveable { mutableIntStateOf(allFilterMask()) }
     val actions =
         ItemActions(
@@ -104,13 +107,29 @@ fun SearchRoute(
             if (next != 0) filterMask = next
         },
         coverArt = viewModel::coverArt,
+        artistArt = { viewModel.artistArt(it) },
         playingSongId = playback.item?.id,
         onBack = onBack,
-        onAlbumClick = onAlbumClick,
-        onArtistClick = onArtistClick,
-        onPlaylistClick = onPlaylistClick,
-        onSongClick = viewModel::play,
-        onLongClick = { contextMenuHost?.show(it, actions) },
+        onAlbumClick = {
+            focusManager.clearFocus()
+            onAlbumClick(it)
+        },
+        onArtistClick = {
+            focusManager.clearFocus()
+            onArtistClick(it)
+        },
+        onPlaylistClick = {
+            focusManager.clearFocus()
+            onPlaylistClick(it)
+        },
+        onSongClick = {
+            focusManager.clearFocus()
+            viewModel.play(it)
+        },
+        onLongClick = {
+            focusManager.clearFocus()
+            contextMenuHost?.show(it, actions)
+        },
     )
 }
 
@@ -129,6 +148,7 @@ fun SearchScreen(
     filters: Set<SearchFilter> = ALL_FILTERS,
     onToggleFilter: (SearchFilter) -> Unit = {},
     coverArt: (String?, Boolean) -> CoverArtRef? = { _, _ -> null },
+    artistArt: (Artist) -> ArtistArt = { ArtistArt() },
     playingSongId: String? = null,
     onBack: () -> Unit = {},
     onAlbumClick: (Album) -> Unit = {},
@@ -198,7 +218,7 @@ fun SearchScreen(
                     contentPadding = PaddingValues(bottom = 24.dp),
                 ) {
                     if (showPlaylists) playlistResults(results.playlists, playlistsLabel, coverArt, onPlaylistClick, onLongClick)
-                    if (showArtists) artistResults(results.artists, artistsLabel, coverArt, onArtistClick, onLongClick)
+                    if (showArtists) artistResults(results.artists, artistsLabel, artistArt, onArtistClick, onLongClick)
                     if (showAlbums) albumResults(results.albums, albumsLabel, coverArt, onAlbumClick, onLongClick)
                     if (showSongs) songResults(results.songs, songsLabel, coverArt, playingSongId, onSongClick, onLongClick)
                 }
@@ -291,19 +311,20 @@ private fun LazyListScope.albumResults(
 private fun LazyListScope.artistResults(
     artists: List<Artist>,
     header: String,
-    coverArt: (String?, Boolean) -> CoverArtRef?,
+    artistArt: (Artist) -> ArtistArt,
     onClick: (Artist) -> Unit,
     onLongClick: (MenuTarget) -> Unit,
 ) {
     if (artists.isEmpty()) return
     resultHeader(header)
     items(artists, key = { "artist-${it.id}" }) { artist ->
+        val art = artistArt(artist)
         ArtistListRow(
             artist = artist,
-            coverArt = coverArt,
+            art = art,
             info = null,
             onClick = { onClick(artist) },
-            onLongClick = { onLongClick(MenuTarget.Artist(artist, coverArt(artist.coverArt, true))) },
+            onLongClick = { onLongClick(MenuTarget.Artist(artist, art.primary)) },
         )
     }
 }

app/src/main/kotlin/com/subtracks/ui/search/SearchViewModel.kt

@@ -12,6 +12,8 @@ import com.subtracks.data.model.Song
 import com.subtracks.data.repo.LibraryRepository
 import com.subtracks.data.repo.SourceRepository
 import com.subtracks.playback.PlaybackController
+import com.subtracks.ui.components.ArtistArt
+import com.subtracks.ui.components.artistArt
 import com.subtracks.ui.home.playSongInContext
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -74,6 +76,11 @@ class SearchViewModel(
         thumbnail: Boolean,
     ): CoverArtRef? = sourceRepository.coverArt(coverArt, thumbnail)
 
+    fun artistArt(
+        artist: Artist,
+        forIcon: Boolean = true,
+    ): ArtistArt = sourceRepository.artistArt(artist, forIcon)
+
     fun play(song: Song) {
         viewModelScope.playSongInContext(libraryRepository, playbackController, song)
     }

app/src/main/kotlin/com/subtracks/ui/settings/ReplayGainControls.kt

@@ -32,6 +32,7 @@ internal fun replayGainModeLabel(
         ReplayGainMode.Off -> resources.getString(R.string.settings_replay_gain_mode_off)
         ReplayGainMode.Track -> resources.getString(R.string.settings_replay_gain_mode_track)
         ReplayGainMode.Album -> resources.getString(R.string.settings_replay_gain_mode_album)
+        ReplayGainMode.Auto -> resources.getString(R.string.settings_replay_gain_mode_auto)
     }
 
 internal fun replayGainPreampLabel(

app/src/main/kotlin/com/subtracks/ui/settings/SettingsScreen.kt

@@ -74,6 +74,7 @@ import com.subtracks.data.prefs.DEFAULT_SYNC_INTERVAL_MINUTES
 import com.subtracks.data.prefs.MAX_REPLAY_GAIN_PREAMP_DB
 import com.subtracks.data.prefs.MIN_REPLAY_GAIN_PREAMP_DB
 import com.subtracks.data.prefs.ReplayGainMode
+import com.subtracks.data.prefs.SortNameMode
 import com.subtracks.data.prefs.StreamQuality
 import com.subtracks.data.prefs.SyncMode
 import com.subtracks.log.Log
@@ -101,6 +102,7 @@ private enum class SettingsDialog {
     SyncMode,
     ReplayGain,
     ReplayGainPreamp,
+    SortNames,
 }
 
 @Composable
@@ -128,6 +130,7 @@ fun SettingsRoute(
     val verboseLogging by viewModel.verboseLogging.collectAsStateWithLifecycle()
     val replayGainMode by viewModel.replayGainMode.collectAsStateWithLifecycle()
     val replayGainPreamp by viewModel.replayGainPreamp.collectAsStateWithLifecycle()
+    val sortNameMode by viewModel.sortNameMode.collectAsStateWithLifecycle()
     val context = LocalContext.current
     val scope = rememberCoroutineScope()
     SettingsScreen(
@@ -143,6 +146,7 @@ fun SettingsRoute(
         scrobbling = scrobbling,
         replayGainMode = replayGainMode,
         replayGainPreamp = replayGainPreamp,
+        sortNameMode = sortNameMode,
         keepScreenOn = keepScreenOn,
         offline = offline,
         verboseLogging = verboseLogging,
@@ -158,6 +162,7 @@ fun SettingsRoute(
         onScrobblingChange = viewModel::setScrobbling,
         onReplayGainModeChange = viewModel::setReplayGainMode,
         onReplayGainPreampChange = viewModel::setReplayGainPreamp,
+        onSortNameModeChange = viewModel::setSortNameMode,
         onKeepScreenOnChange = viewModel::setKeepScreenOn,
         onOfflineChange = viewModel::setOfflineMode,
         onVerboseLoggingChange = viewModel::setVerboseLogging,
@@ -203,8 +208,9 @@ fun SettingsScreen(
     verboseLogging: Boolean = false,
     syncMode: SyncMode = SyncMode.WifiOnly,
     syncInterval: Int = DEFAULT_SYNC_INTERVAL_MINUTES,
-    replayGainMode: ReplayGainMode = ReplayGainMode.Track,
+    replayGainMode: ReplayGainMode = ReplayGainMode.Auto,
     replayGainPreamp: Float = 0f,
+    sortNameMode: SortNameMode = SortNameMode.Name,
     onSelectSource: (Long) -> Unit,
     onEditServer: (Long) -> Unit,
     onWifiQualityChange: (StreamQuality) -> Unit,
@@ -217,6 +223,7 @@ fun SettingsScreen(
     onScrobblingChange: (Boolean) -> Unit,
     onReplayGainModeChange: (ReplayGainMode) -> Unit = {},
     onReplayGainPreampChange: (Float) -> Unit = {},
+    onSortNameModeChange: (SortNameMode) -> Unit = {},
     onKeepScreenOnChange: (Boolean) -> Unit = {},
     onOfflineChange: (Boolean) -> Unit = {},
     onVerboseLoggingChange: (Boolean) -> Unit = {},
@@ -324,14 +331,6 @@ fun SettingsScreen(
                     colors = ListItemDefaults.colors(containerColor = Color.Transparent),
                 )
             }
-            item {
-                ListItem(
-                    headlineContent = { Text(stringResource(R.string.sync_concurrency)) },
-                    supportingContent = { Text(concurrencyLabel(LocalResources.current, syncConcurrency)) },
-                    modifier = Modifier.clickable { dialog = SettingsDialog.SyncConcurrency },
-                    colors = ListItemDefaults.colors(containerColor = Color.Transparent),
-                )
-            }
             item {
                 ListItem(
                     headlineContent = { Text(stringResource(R.string.settings_sync_auto_title)) },
@@ -348,6 +347,23 @@ fun SettingsScreen(
                     colors = ListItemDefaults.colors(containerColor = Color.Transparent),
                 )
             }
+            item {
+                ListItem(
+                    headlineContent = { Text(stringResource(R.string.sync_concurrency)) },
+                    supportingContent = { Text(concurrencyLabel(LocalResources.current, syncConcurrency)) },
+                    modifier = Modifier.clickable { dialog = SettingsDialog.SyncConcurrency },
+                    colors = ListItemDefaults.colors(containerColor = Color.Transparent),
+                )
+            }
+            item { SectionHeader(stringResource(R.string.settings_library_name)) }
+            item {
+                ListItem(
+                    headlineContent = { Text(stringResource(R.string.settings_sort_names_title)) },
+                    supportingContent = { Text(sortNameModeLabel(LocalResources.current, sortNameMode)) },
+                    modifier = Modifier.clickable { dialog = SettingsDialog.SortNames },
+                    colors = ListItemDefaults.colors(containerColor = Color.Transparent),
+                )
+            }
             item { SectionHeader(stringResource(R.string.settings_music_name)) }
             item {
                 ListItem(
@@ -603,6 +619,14 @@ fun SettingsScreen(
             )
         }
 
+        SettingsDialog.SortNames -> {
+            SortNameModeDialog(
+                selected = sortNameMode,
+                onSelect = onSortNameModeChange,
+                onDismiss = { dialog = null },
+            )
+        }
+
         null -> {
             Unit
         }
@@ -756,6 +780,52 @@ private fun SyncModeDialog(
     )
 }
 
+private val sortNameModeOptions =
+    listOf(SortNameMode.Name, SortNameMode.SortName, SortNameMode.NonLatin)
+
+private fun sortNameModeLabel(
+    resources: Resources,
+    mode: SortNameMode,
+): String =
+    when (mode) {
+        SortNameMode.SortName -> resources.getString(R.string.sort_name_mode_sort_name)
+        SortNameMode.Name -> resources.getString(R.string.sort_name_mode_name)
+        SortNameMode.NonLatin -> resources.getString(R.string.sort_name_mode_non_latin)
+    }
+
+@Composable
+private fun SortNameModeDialog(
+    selected: SortNameMode,
+    onSelect: (SortNameMode) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    val resources = LocalResources.current
+    var draft by remember(selected) { mutableStateOf(selected) }
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringResource(R.string.settings_sort_names_title)) },
+        text = {
+            ChoiceGroup(
+                header = stringResource(R.string.settings_sort_names_prompt),
+                options = sortNameModeOptions.map { it to sortNameModeLabel(resources, it) },
+                selected = draft,
+                onSelect = { draft = it },
+            )
+        },
+        confirmButton = {
+            TextButton(
+                onClick = {
+                    onSelect(draft)
+                    onDismiss()
+                },
+            ) { Text(stringResource(R.string.action_done)) }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text(stringResource(R.string.actions_cancel)) }
+        },
+    )
+}
+
 @Composable
 private fun ReplayGainModeDialog(
     selected: ReplayGainMode,

app/src/main/kotlin/com/subtracks/ui/settings/SettingsViewModel.kt

@@ -6,6 +6,7 @@ import com.subtracks.data.model.Source
 import com.subtracks.data.net.NetworkMode
 import com.subtracks.data.prefs.DEFAULT_SYNC_INTERVAL_MINUTES
 import com.subtracks.data.prefs.ReplayGainMode
+import com.subtracks.data.prefs.SortNameMode
 import com.subtracks.data.prefs.StreamQuality
 import com.subtracks.data.prefs.SyncMode
 import com.subtracks.data.prefs.UserPreferences
@@ -69,13 +70,18 @@ class SettingsViewModel(
     val replayGainMode: StateFlow<ReplayGainMode> =
         userPreferences
             .replayGainMode()
-            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), ReplayGainMode.Track)
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), ReplayGainMode.Auto)
 
     val replayGainPreamp: StateFlow<Float> =
         userPreferences
             .replayGainPreampDb()
             .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), 0f)
 
+    val sortNameMode: StateFlow<SortNameMode> =
+        userPreferences
+            .sortNameMode()
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), SortNameMode.Name)
+
     val keepScreenOn: StateFlow<Boolean> =
         userPreferences
             .keepScreenOn()
@@ -143,4 +149,8 @@ class SettingsViewModel(
     fun setKeepScreenOn(enabled: Boolean) {
         viewModelScope.launch { userPreferences.setKeepScreenOn(enabled) }
     }
+
+    fun setSortNameMode(mode: SortNameMode) {
+        viewModelScope.launch { userPreferences.setSortNameMode(mode) }
+    }
 }

app/src/main/res/values/strings.xml

@@ -35,6 +35,14 @@
     <string name="resources_filter_artist">Artist</string>
     <string name="artist_type_artist">Artist</string>
     <string name="artist_type_album_artist">Album artist</string>
+    <string name="artist_section_albums">Albums</string>
+    <string name="artist_section_appearances">Appears on</string>
+    <string name="artist_bio_empty">No artist bio available.</string>
+    <string name="artist_bio_loading">Loading artist bio…</string>
+    <string name="artist_bio_unavailable">Artist bio unavailable.</string>
+    <string name="artist_bio_more">More</string>
+    <string name="artist_bio_less">Less</string>
+    <string name="artist_meta">%1$s · %2$s</string>
     <string name="resources_filter_genre">Genre</string>
     <string name="resources_filter_starred">Starred</string>
     <string name="resources_song_list_delete_all_content">%1$s\n\nDeleting will free %2$s</string>
@@ -71,15 +79,17 @@
     <string name="settings_about_verbose_logging">Verbose logging</string>
     <string name="settings_about_verbose_logging_description">Log extra detail for troubleshooting</string>
     <string name="settings_about_version">Version %1$s</string>
+    <string name="settings_library_name">Library</string>
     <string name="settings_music_name">Playback</string>
     <string name="settings_music_options_scrobble_description_on">Send now playing and play counts</string>
     <string name="settings_music_options_scrobble_title">Scrobble to server</string>
     <string name="settings_replay_gain_mode_album">Album gain</string>
+    <string name="settings_replay_gain_mode_auto">Auto</string>
     <string name="settings_replay_gain_mode_off">Off</string>
     <string name="settings_replay_gain_mode_track">Track gain</string>
     <string name="settings_replay_gain_preamp_decrease">Lower preamp</string>
     <string name="settings_replay_gain_preamp_increase">Raise preamp</string>
-    <string name="settings_replay_gain_preamp_prompt">Extra level on top of ReplayGain</string>
+    <string name="settings_replay_gain_preamp_prompt">Extra level on top of ReplayGain (tracks without peak data cannot be boosted)</string>
     <string name="settings_replay_gain_preamp_reset">Reset</string>
     <string name="settings_replay_gain_preamp_title">Preamp</string>
     <string name="settings_replay_gain_preamp_value">%1$s dB</string>
@@ -87,6 +97,11 @@
     <string name="settings_replay_gain_title">ReplayGain</string>
     <string name="settings_music_options_keep_screen_on_description">Keep the screen on while now playing is open</string>
     <string name="settings_music_options_keep_screen_on_title">Keep screen on</string>
+    <string name="settings_sort_names_title">Sort names</string>
+    <string name="settings_sort_names_prompt">Choose how names are ordered in album and artist lists.</string>
+    <string name="sort_name_mode_sort_name">Use sort names</string>
+    <string name="sort_name_mode_name">Use regular names</string>
+    <string name="sort_name_mode_non_latin">Non-Latin names only</string>
     <string name="settings_network_name">Network</string>
     <string name="settings_network_options_max_bitrate_mobile_title">Stream quality: Mobile</string>
     <string name="settings_network_options_max_bitrate_wifi_title">Stream quality: Wi-Fi</string>
@@ -140,6 +155,7 @@
     <string name="more_options">More options</string>
     <string name="open_album">Open album</string>
     <string name="open_artist">Open artist</string>
+    <string name="artist_chooser_title">Artists</string>
     <string name="unknown_artist">Unknown artist</string>
     <string name="unknown_album">Unknown album</string>
 
@@ -181,6 +197,24 @@
     <string name="info_sample_rate_value">%1$d Hz</string>
     <string name="info_channels">Channels</string>
     <string name="info_close">Close</string>
+    <string name="info_artists">Artists</string>
+    <string name="info_artists_sort">Artists sort</string>
+    <string name="info_album_artists">Album artists</string>
+    <string name="info_album_artist_sort">Album artist sort</string>
+    <string name="info_sort_title">Sort title</string>
+    <string name="info_artist_sort">Artist sort</string>
+    <string name="info_sort_name">Sort name</string>
+    <string name="info_albums">Albums</string>
+    <string name="info_songs">Songs</string>
+    <string name="info_plays">Plays</string>
+    <string name="info_last_played">Last played</string>
+    <string name="info_added">Added</string>
+    <string name="info_created">Created</string>
+    <string name="info_updated">Updated</string>
+    <string name="info_owner">Owner</string>
+    <string name="info_shared">Shared</string>
+    <string name="info_length">Length</string>
+    <string name="info_downloaded_count">%1$d of %2$d</string>
 
     <string name="disc_header">Disc %1$d</string>
     <string name="disc_track">%1$s: Disc %2$d</string>

app/src/test/kotlin/com/subtracks/data/db/AlbumCreditsTest.kt

@@ -0,0 +1,58 @@
+package com.subtracks.data.db
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class AlbumCreditsTest {
+    @Test
+    fun everyVariantUsesAllFourCreditPaths() {
+        val variants =
+            listOf(
+                CREDITED_ALBUM_ROWS,
+                DOWNLOADED_ALBUM_ROWS,
+                DOWNLOADED_ALBUM_DETAILS_FOR_ARTIST,
+                DOWNLOADED_COVER_ALBUM_ROWS,
+                ARTIST_COVER_CREDITS,
+                ARTIST_COVER_CREDITS_FOR_ARTIST,
+                ALBUMS_FOR_ARTIST_DOWNLOADED,
+            )
+        variants.forEach { sql ->
+            assertEquals(sql, 1, sql.occurrences("FROM albums"))
+            assertEquals(sql, 1, sql.occurrences("FROM album_artists"))
+            assertEquals(sql, 1, sql.occurrences("FROM songs JOIN albums"))
+            assertEquals(sql, 1, sql.occurrences("FROM song_artists"))
+        }
+    }
+
+    @Test
+    fun variantsKeepTheirOwnFiltersAndDuplicateSemantics() {
+        assertFalse(CREDITED_ALBUM_ROWS.contains("coverArt IS NOT NULL"))
+        assertFalse(CREDITED_ALBUM_ROWS.contains("song_downloads"))
+        assertTrue(CREDITED_ALBUM_ROWS.contains(" UNION ALL "))
+        assertEquals(4, ARTIST_COVER_CREDITS.occurrences("coverArt IS NOT NULL"))
+        assertEquals(4, ARTIST_COVER_CREDITS_FOR_ARTIST.occurrences("= :artistId"))
+        assertEquals(4, DOWNLOADED_ALBUM_ROWS.occurrences("sd.status = 'Completed'"))
+        assertEquals(4, DOWNLOADED_ALBUM_DETAILS_FOR_ARTIST.occurrences("= :artistId"))
+        assertEquals(4, DOWNLOADED_COVER_ALBUM_ROWS.occurrences("coverArt IS NOT NULL"))
+        assertTrue(DOWNLOADED_ALBUM_ROWS.contains(" UNION "))
+        assertFalse(DOWNLOADED_ALBUM_ROWS.contains(" UNION ALL "))
+        assertFalse(DOWNLOADED_ALBUM_ROWS.contains("creditType"))
+    }
+
+    @Test
+    fun consumersEmbedTheSharedVariants() {
+        assertTrue(ALBUMS_FOR_ARTIST.contains(CREDITED_ALBUM_ROWS))
+        assertTrue(ALBUM_CREDIT_ALBUM_IDS.contains(CREDITED_ALBUM_ROWS))
+        assertTrue(ARTIST_AGGREGATES_SQL.contains(CREDITED_ALBUM_ROWS))
+        assertTrue(DOWNLOADED_ARTIST_ALBUMS.contains(DOWNLOADED_ALBUM_ROWS))
+        assertTrue(ALBUMS_FOR_ARTIST_DOWNLOADED.contains(DOWNLOADED_ALBUM_DETAILS_FOR_ARTIST))
+        assertTrue(ARTIST_COVER_ARTS_SQL.contains(ARTIST_COVER_CREDITS_FOR_ARTIST))
+        assertTrue(ARTIST_ART_UPDATE_SQL.contains(ARTIST_COVER_CREDITS))
+        assertTrue(ARTIST_ART_UPDATE_SQL.contains(DOWNLOADED_COVER_ALBUM_ROWS))
+        assertTrue(DOWNLOADED_ARTIST_ART_UPDATE_SQL.contains(DOWNLOADED_COVER_ALBUM_ROWS))
+    }
+
+    private fun String.occurrences(value: String): Int = split(value).size - 1
+}

app/src/test/kotlin/com/subtracks/data/db/ArtworkSeedDaoTest.kt

@@ -1,9 +1,5 @@
 package com.subtracks.data.db
 
-import android.content.Context
-import androidx.room3.Room
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
-import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.data.model.ArtworkSeed
 import com.subtracks.data.model.Source
@@ -22,12 +18,7 @@ class ArtworkSeedDaoTest {
 
     @Before
     fun setUp() {
-        val context = ApplicationProvider.getApplicationContext<Context>()
-        db =
-            Room
-                .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                .setDriver(BundledSQLiteDriver())
-                .build()
+        db = createTestDatabase()
     }
 
     @After

app/src/test/kotlin/com/subtracks/data/db/LibraryHomeDaoTest.kt

@@ -1,11 +1,7 @@
 package com.subtracks.data.db
 
-import android.content.Context
 import androidx.paging.PagingSource
-import androidx.room3.Room
 import androidx.room3.useWriterConnection
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
-import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.data.model.Album
 import com.subtracks.data.model.Artist
@@ -27,12 +23,7 @@ class LibraryHomeDaoTest {
 
     @Before
     fun setUp() {
-        val context = ApplicationProvider.getApplicationContext<Context>()
-        db =
-            Room
-                .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                .setDriver(BundledSQLiteDriver())
-                .build()
+        db = createTestDatabase()
     }
 
     @After

app/src/test/kotlin/com/subtracks/data/db/LibraryPagingTestSupport.kt

@@ -0,0 +1,109 @@
+package com.subtracks.data.db
+
+import androidx.paging.PagingSource
+import com.subtracks.data.model.Album
+import com.subtracks.data.model.Artist
+import com.subtracks.data.model.Playlist
+import com.subtracks.data.prefs.AlbumSort
+import com.subtracks.data.prefs.ArtistSort
+import com.subtracks.data.prefs.PlaylistSort
+import com.subtracks.data.prefs.SortNameMode
+
+internal fun LibraryDao.albumPages(
+    sourceId: Long,
+    starredFilter: Int = 0,
+    search: String = "",
+    sort: AlbumSort = AlbumSort.Name,
+    descending: Boolean = false,
+    downloaded: Boolean = false,
+    sortNameMode: SortNameMode = SortNameMode.SortName,
+): PagingSource<Int, Album> =
+    if (downloaded) {
+        downloadedAlbumsPaging(
+            albumsPageQuery(
+                sourceId = sourceId,
+                starredFilter = starredFilter,
+                search = search,
+                sort = sort,
+                descending = descending,
+                downloaded = true,
+                sortNameMode = sortNameMode,
+            ),
+        )
+    } else {
+        albumsPaging(
+            albumsPageQuery(
+                sourceId = sourceId,
+                starredFilter = starredFilter,
+                search = search,
+                sort = sort,
+                descending = descending,
+                downloaded = false,
+                sortNameMode = sortNameMode,
+            ),
+        )
+    }
+
+internal fun LibraryDao.artistPages(
+    sourceId: Long,
+    starredFilter: Int = 0,
+    search: String = "",
+    sort: ArtistSort = ArtistSort.Name,
+    descending: Boolean = false,
+    downloaded: Boolean = false,
+    sortNameMode: SortNameMode = SortNameMode.SortName,
+): PagingSource<Int, Artist> =
+    if (downloaded) {
+        downloadedArtistsPaging(
+            artistsPageQuery(
+                sourceId = sourceId,
+                starredFilter = starredFilter,
+                search = search,
+                sort = sort,
+                descending = descending,
+                downloaded = true,
+                sortNameMode = sortNameMode,
+            ),
+        )
+    } else {
+        artistsPaging(
+            artistsPageQuery(
+                sourceId = sourceId,
+                starredFilter = starredFilter,
+                search = search,
+                sort = sort,
+                descending = descending,
+                downloaded = false,
+                sortNameMode = sortNameMode,
+            ),
+        )
+    }
+
+internal fun LibraryDao.playlistPages(
+    sourceId: Long,
+    search: String = "",
+    sort: PlaylistSort = PlaylistSort.Name,
+    descending: Boolean = false,
+    downloaded: Boolean = false,
+): PagingSource<Int, Playlist> =
+    if (downloaded) {
+        downloadedPlaylistsPaging(
+            playlistsPageQuery(
+                sourceId = sourceId,
+                search = search,
+                sort = sort,
+                descending = descending,
+                downloaded = true,
+            ),
+        )
+    } else {
+        playlistsPaging(
+            playlistsPageQuery(
+                sourceId = sourceId,
+                search = search,
+                sort = sort,
+                descending = descending,
+                downloaded = false,
+            ),
+        )
+    }

app/src/test/kotlin/com/subtracks/data/db/MigrationsTest.kt

@@ -7,6 +7,7 @@ import androidx.test.ext.junit.runners.AndroidJUnit4
 import kotlinx.coroutines.test.runTest
 import org.json.JSONObject
 import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
 import org.junit.Test
 import org.junit.runner.RunWith
 import java.io.File
@@ -54,17 +55,19 @@ class MigrationsTest {
                 applySchema(migrated, versions.first())
                 MIGRATIONS.sortedBy { it.startVersion }.forEach { it.migrate(migrated) }
 
-                assertEquals("NOCASE", indexColumn(migrated, "index_albums_name", "name").collation)
-                assertEquals("NOCASE", indexColumn(migrated, "index_albums_artist", "albumArtist").collation)
-                assertEquals("NOCASE", indexColumn(migrated, "index_albums_artist", "name").collation)
+                assertEquals("NOCASE", indexColumn(migrated, "index_albums_name", "sortName").collation)
+                assertEquals("NOCASE", indexColumn(migrated, "index_albums_artist", "albumArtistSort").collation)
+                assertEquals("NOCASE", indexColumn(migrated, "index_albums_artist", "sortName").collation)
                 assertEquals(1, indexColumn(migrated, "index_albums_year", "year").descending)
-                assertEquals("NOCASE", indexColumn(migrated, "index_albums_year", "name").collation)
-                assertEquals(0, indexColumn(migrated, "index_albums_year", "name").descending)
+                assertEquals("NOCASE", indexColumn(migrated, "index_albums_year", "sortName").collation)
+                assertEquals(0, indexColumn(migrated, "index_albums_year", "sortName").descending)
                 assertEquals(1, indexColumn(migrated, "index_albums_added", "created").descending)
                 assertEquals(1, indexColumn(migrated, "index_albums_starred", "starred").descending)
                 assertEquals(1, indexColumn(migrated, "index_albums_frequent", "playCount").descending)
                 assertEquals(1, indexColumn(migrated, "index_albums_recent", "played").descending)
-                assertEquals("NOCASE", indexColumn(migrated, "index_artists_name", "name").collation)
+                assertEquals("NOCASE", indexColumn(migrated, "index_songs_starred", "sortName").collation)
+                assertEquals(1, indexColumn(migrated, "index_songs_starred", "starred").descending)
+                assertEquals("NOCASE", indexColumn(migrated, "index_artists_name", "sortName").collation)
                 assertEquals(1, indexColumn(migrated, "index_artists_albumCount", "albumCount").descending)
                 assertEquals(1, indexColumn(migrated, "index_artists_starred", "starred").descending)
                 assertEquals(1, indexColumn(migrated, "index_artists_frequent", "playCount").descending)
@@ -134,6 +137,128 @@ class MigrationsTest {
             }
         }
 
+    @Test
+    fun theArtistBioTableStoresTheLatestBiography() =
+        runTest {
+            driver.open(":memory:").use { migrated ->
+                applySchema(migrated, 34)
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (1, 's', 'http://x', 1, 0)",
+                )
+
+                MIGRATION_34_35.migrate(migrated)
+                migrated.execSQL("INSERT INTO artist_bios (sourceId, artistId, biography) VALUES (1, 'ar1', 'Old')")
+                migrated.execSQL("UPDATE artist_bios SET biography = 'New' WHERE sourceId = 1 AND artistId = 'ar1'")
+
+                assertEquals("New", text(migrated, "SELECT biography FROM artist_bios WHERE artistId = 'ar1'"))
+            }
+        }
+
+    @Test
+    fun theArtistArtColumnsDefaultToEmptyAndAcceptValues() =
+        runTest {
+            driver.open(":memory:").use { migrated ->
+                applySchema(migrated, 35)
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (1, 's', 'http://x', 1, 0)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO artists (sourceId, id, name, albumCount, starred) " +
+                        "VALUES (1, 'ar1', 'Artist', 0, NULL)",
+                )
+
+                MIGRATION_35_36.migrate(migrated)
+
+                assertEquals(1L, long(migrated, "SELECT artistImageUrl IS NULL FROM artists WHERE id = 'ar1'"))
+                assertEquals("", text(migrated, "SELECT coverArts FROM artists WHERE id = 'ar1'"))
+                assertEquals("", text(migrated, "SELECT downloadedCoverArts FROM artists WHERE id = 'ar1'"))
+                migrated.execSQL(
+                    "UPDATE artists SET artistImageUrl = 'http://img', coverArts = 'a\u001fb', " +
+                        "downloadedCoverArts = 'c' WHERE id = 'ar1'",
+                )
+                assertEquals("http://img", text(migrated, "SELECT artistImageUrl FROM artists WHERE id = 'ar1'"))
+                assertEquals("a\u001fb", text(migrated, "SELECT coverArts FROM artists WHERE id = 'ar1'"))
+                assertEquals("c", text(migrated, "SELECT downloadedCoverArts FROM artists WHERE id = 'ar1'"))
+            }
+        }
+
+    @Test
+    fun theArtistArtMigrationBackfillsExistingLibraries() =
+        runTest {
+            driver.open(":memory:").use { migrated ->
+                applySchema(migrated, 35)
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (1, 's', 'http://x', 1, 0)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO artists (sourceId, id, name, albumCount, starred) " +
+                        "VALUES (1, 'ar1', 'Artist', 3, NULL)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO albums (sourceId, id, artistId, name, albumArtist, created, coverArt, genre, " +
+                        "year, starred, songCount) VALUES " +
+                        "(1, 'al1', 'ar1', 'Shared', 'Artist', 0, 'shared', NULL, 2020, NULL, 1), " +
+                        "(1, 'al2', 'ar1', 'Shared Newer', 'Artist', 0, 'shared', NULL, 2021, NULL, 1), " +
+                        "(1, 'al3', 'ar1', 'Other', 'Artist', 0, 'other', NULL, 2019, NULL, 1)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO songs (sourceId, id, albumId, artistId, title) VALUES " +
+                        "(1, 's1', 'al1', 'ar1', 'One'), (1, 's2', 'al2', 'ar1', 'Two'), " +
+                        "(1, 's3', 'al3', 'ar1', 'Three')",
+                )
+                migrated.execSQL(
+                    "INSERT INTO song_downloads (sourceId, songId, status, bytes, total) VALUES " +
+                        "(1, 's1', 'Completed', 1, 1), (1, 's2', 'Completed', 1, 1)",
+                )
+
+                MIGRATION_35_36.migrate(migrated)
+
+                assertEquals("shared\u001fother", text(migrated, "SELECT coverArts FROM artists WHERE id = 'ar1'"))
+                assertEquals("shared", text(migrated, "SELECT downloadedCoverArts FROM artists WHERE id = 'ar1'"))
+            }
+        }
+
+    @Test
+    fun theArtistSearchTriggersIgnoreArtOnlyUpdates() =
+        runTest {
+            driver.open(":memory:").use { migrated ->
+                applySchema(migrated, 35)
+                MIGRATION_35_36.migrate(migrated)
+
+                assertTrue(artistSearchTriggersOptimized(migrated))
+                assertTrue(
+                    triggerSql(migrated, "room_fts_content_sync_artist_search_BEFORE_UPDATE")
+                        .contains("UPDATE OF `name`, `sortName`"),
+                )
+                assertTrue(
+                    triggerSql(migrated, "room_fts_content_sync_artist_search_AFTER_UPDATE")
+                        .contains("UPDATE OF `name`, `sortName`"),
+                )
+            }
+        }
+
+    @Test
+    fun theFreshDatabaseCallbackOptimizesTheArtistSearchTriggers() =
+        runTest {
+            driver.open(":memory:").use { connection ->
+                applySchema(connection, 36)
+                connection.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (1, 's', 'http://x', 1, 0)",
+                )
+                connection.execSQL(
+                    "INSERT INTO artists (sourceId, id, name, albumCount, starred) " +
+                        "VALUES (1, 'ar1', 'Artist', 0, NULL)",
+                )
+
+                ArtistSearchTriggerOptimization.onOpen(connection)
+                assertTrue(artistSearchTriggersOptimized(connection))
+                val before = long(connection, "SELECT total_changes()")
+                connection.execSQL("UPDATE artists SET coverArts = 'a' WHERE id = 'ar1'")
+
+                assertEquals(before + 1, long(connection, "SELECT total_changes()"))
+            }
+        }
+
     @Test
     fun theGenreBackfillTrimsAndSkipsBlankSingularGenres() =
         runTest {
@@ -153,6 +278,211 @@ class MigrationsTest {
             }
         }
 
+    @Test
+    fun theArtistSongCountBackfillCountsLegacyCredits() =
+        runTest {
+            driver.open(":memory:").use { migrated ->
+                applySchema(migrated, 29)
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (1, 's', 'http://x', 1, 0)",
+                )
+                migrated.execSQL("INSERT INTO artists (sourceId, id, name, albumCount) VALUES (1, 'ar1', 'Album Artist', 1)")
+                migrated.execSQL("INSERT INTO artists (sourceId, id, name, albumCount) VALUES (1, 'ar2', 'Guest', 0)")
+                migrated.execSQL(
+                    "INSERT INTO albums (sourceId, id, artistId, name, albumArtist, created, songCount) " +
+                        "VALUES (1, 'al1', 'ar1', 'Album', 'Album Artist', 0, 1)",
+                )
+                migrated.execSQL("INSERT INTO songs (sourceId, id, albumId, artistId, title) VALUES (1, 's1', 'al1', 'ar1', 'One')")
+                migrated.execSQL("INSERT INTO songs (sourceId, id, albumId, artistId, title) VALUES (1, 's2', NULL, 'ar2', 'Two')")
+
+                MIGRATION_29_30.migrate(migrated)
+
+                assertEquals(1L, long(migrated, "SELECT songCount FROM artists WHERE id = 'ar1'"))
+                assertEquals(1L, long(migrated, "SELECT songCount FROM artists WHERE id = 'ar2'"))
+            }
+        }
+
+    @Test
+    fun theSortNameBackfillUsesDisplayNamesAndArtistSortNames() =
+        runTest {
+            driver.open(":memory:").use { migrated ->
+                applySchema(migrated, 30)
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (1, 's', 'http://x', 1, 0)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO artists (sourceId, id, name, albumCount) " +
+                        "VALUES (1, 'ar1', 'Utada Hikaru', 1)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO albums (sourceId, id, artistId, name, albumArtist, created, songCount) " +
+                        "VALUES (1, 'al1', 'ar1', 'First Love', 'Utada Hikaru', 0, 1)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO songs (sourceId, id, albumId, artistId, title) " +
+                        "VALUES (1, 's1', 'al1', 'ar1', 'Automatic')",
+                )
+
+                MIGRATION_30_31.migrate(migrated)
+
+                assertEquals("Utada Hikaru", text(migrated, "SELECT sortName FROM artists WHERE id = 'ar1'"))
+                assertEquals("First Love", text(migrated, "SELECT sortName FROM albums WHERE id = 'al1'"))
+                assertEquals("Utada Hikaru", text(migrated, "SELECT albumArtistSort FROM albums WHERE id = 'al1'"))
+                assertEquals("Automatic", text(migrated, "SELECT sortName FROM songs WHERE id = 's1'"))
+                assertEquals("Utada Hikaru", text(migrated, "SELECT artistSort FROM songs WHERE id = 's1'"))
+                assertEquals(1L, long(migrated, "SELECT COUNT(*) FROM artist_search WHERE artist_search MATCH 'utada'"))
+                assertEquals(1L, long(migrated, "SELECT COUNT(*) FROM album_search WHERE album_search MATCH 'first'"))
+                assertEquals(1L, long(migrated, "SELECT COUNT(*) FROM song_search WHERE song_search MATCH 'utada'"))
+            }
+        }
+
+    @Test
+    fun theArtistCreditedFlagsHideRowsWithoutCredits() =
+        runTest {
+            driver.open(":memory:").use { migrated ->
+                applySchema(migrated, 31)
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (1, 's', 'http://x', 1, 0)",
+                )
+                migrated.execSQL("INSERT INTO artists (sourceId, id, name, albumCount) VALUES (1, 'a1', 'Alpha', 1)")
+                migrated.execSQL("INSERT INTO artists (sourceId, id, name, albumCount) VALUES (1, 'combo', 'Alpha & Beta', 1)")
+                migrated.execSQL(
+                    "INSERT INTO albums (sourceId, id, artistId, name, albumArtist, created, songCount) " +
+                        "VALUES (1, 'al1', 'a1', 'Album', 'Alpha', 0, 0)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO album_artists (sourceId, albumId, position, artistId, name) " +
+                        "VALUES (1, 'al1', 0, 'a1', 'Alpha')",
+                )
+                migrated.execSQL(
+                    "INSERT INTO songs (sourceId, id, albumId, artistId, title) VALUES (1, 's1', 'al1', 'a1', 'Song')",
+                )
+                migrated.execSQL(
+                    "INSERT INTO song_artists (sourceId, songId, position, artistId, name) " +
+                        "VALUES (1, 's1', 0, 'a1', 'Alpha')",
+                )
+
+                MIGRATION_31_32.migrate(migrated)
+
+                assertEquals(1L, long(migrated, "SELECT credited FROM artists WHERE id = 'a1'"))
+                assertEquals(0L, long(migrated, "SELECT credited FROM artists WHERE id = 'combo'"))
+            }
+        }
+
+    @Test
+    fun theCreditedBackfillKeepsArtistsVisibleWhileRelationsAreIncomplete() =
+        runTest {
+            driver.open(":memory:").use { migrated ->
+                applySchema(migrated, 31)
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (1, 's', 'http://x', 1, 0)",
+                )
+                migrated.execSQL("INSERT INTO artists (sourceId, id, name, albumCount) VALUES (1, 'a1', 'Alpha', 1)")
+                migrated.execSQL("INSERT INTO artists (sourceId, id, name, albumCount) VALUES (1, 'combo', 'Alpha & Beta', 1)")
+                migrated.execSQL(
+                    "INSERT INTO albums (sourceId, id, artistId, name, albumArtist, created, songCount) " +
+                        "VALUES (1, 'al1', 'a1', 'Album', 'Alpha', 0, 0)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO album_artists (sourceId, albumId, position, artistId, name) " +
+                        "VALUES (1, 'al1', 0, 'a1', 'Alpha')",
+                )
+
+                MIGRATION_31_32.migrate(migrated)
+
+                assertEquals(1L, long(migrated, "SELECT credited FROM artists WHERE id = 'a1'"))
+                assertEquals(1L, long(migrated, "SELECT credited FROM artists WHERE id = 'combo'"))
+            }
+        }
+
+    @Test
+    fun theCreditTotalsBackfillUsesEveryCreditedSong() =
+        runTest {
+            driver.open(":memory:").use { migrated ->
+                applySchema(migrated, 33)
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (1, 's', 'http://x', 1, 0)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (2, 't', 'http://y', 1, 0)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO sources (id, name, address, isActive, createdAt) VALUES (3, 'u', 'http://z', 1, 0)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO artists (sourceId, id, name, albumCount, songCount, playCount, played) " +
+                        "VALUES (1, 'a1', 'Album Artist', 1, 0, 0, NULL)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO artists (sourceId, id, name, albumCount, songCount, playCount, played) " +
+                        "VALUES (1, 'a2', 'Guest', 0, 0, 0, NULL)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO artists (sourceId, id, name, albumCount, songCount, playCount, played) " +
+                        "VALUES (2, 'b1', 'Unsynced', 7, 6, 5, 100)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO artists (sourceId, id, name, albumCount, songCount, playCount, played) " +
+                        "VALUES (3, 'c1', 'Track Only', 7, 6, 5, 100)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO albums (sourceId, id, artistId, name, albumArtist, created, songCount) " +
+                        "VALUES (1, 'al1', 'a1', 'Album', 'Album Artist', 0, 1)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO albums (sourceId, id, artistId, name, albumArtist, created, songCount) " +
+                        "VALUES (1, 'al2', 'a2', 'Empty Album', 'Guest', 0, 0)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO album_artists (sourceId, albumId, position, artistId, name) " +
+                        "VALUES (1, 'al1', 0, 'a1', 'Album Artist')",
+                )
+                migrated.execSQL(
+                    "INSERT INTO songs (sourceId, id, albumId, artistId, title, playCount, played) " +
+                        "VALUES (1, 's1', 'al1', 'a1', 'One', 4, 200)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO song_artists (sourceId, songId, position, artistId, name) " +
+                        "VALUES (1, 's1', 0, 'a1', 'Album Artist')",
+                )
+                migrated.execSQL(
+                    "INSERT INTO song_artists (sourceId, songId, position, artistId, name) " +
+                        "VALUES (1, 's1', 1, 'a2', 'Guest')",
+                )
+                migrated.execSQL(
+                    "INSERT INTO songs (sourceId, id, albumId, artistId, title, playCount, played) " +
+                        "VALUES (3, 's3', NULL, 'c1', 'Three', 2, 50)",
+                )
+                migrated.execSQL(
+                    "INSERT INTO song_artists (sourceId, songId, position, artistId, name) " +
+                        "VALUES (3, 's3', 0, 'c1', 'Track Only')",
+                )
+                migrated.execSQL(
+                    "INSERT INTO songs (sourceId, id, albumId, artistId, title, playCount, played) " +
+                        "VALUES (3, 's4', 'missing', 'c1', 'Four', 3, 60)",
+                )
+
+                MIGRATION_33_34.migrate(migrated)
+
+                assertEquals(1L, long(migrated, "SELECT songCount FROM artists WHERE id = 'a1'"))
+                assertEquals(1L, long(migrated, "SELECT albumCount FROM artists WHERE id = 'a1'"))
+                assertEquals(4L, long(migrated, "SELECT playCount FROM artists WHERE id = 'a1'"))
+                assertEquals(200L, long(migrated, "SELECT played FROM artists WHERE id = 'a1'"))
+                assertEquals(1L, long(migrated, "SELECT songCount FROM artists WHERE id = 'a2'"))
+                assertEquals(2L, long(migrated, "SELECT albumCount FROM artists WHERE id = 'a2'"))
+                assertEquals(4L, long(migrated, "SELECT playCount FROM artists WHERE id = 'a2'"))
+                assertEquals(200L, long(migrated, "SELECT played FROM artists WHERE id = 'a2'"))
+                assertEquals(6L, long(migrated, "SELECT songCount FROM artists WHERE id = 'b1'"))
+                assertEquals(7L, long(migrated, "SELECT albumCount FROM artists WHERE id = 'b1'"))
+                assertEquals(5L, long(migrated, "SELECT playCount FROM artists WHERE id = 'b1'"))
+                assertEquals(100L, long(migrated, "SELECT played FROM artists WHERE id = 'b1'"))
+                assertEquals(2L, long(migrated, "SELECT songCount FROM artists WHERE id = 'c1'"))
+                assertEquals(0L, long(migrated, "SELECT albumCount FROM artists WHERE id = 'c1'"))
+                assertEquals(5L, long(migrated, "SELECT playCount FROM artists WHERE id = 'c1'"))
+                assertEquals(60L, long(migrated, "SELECT played FROM artists WHERE id = 'c1'"))
+            }
+        }
+
     private fun text(
         connection: SQLiteConnection,
         sql: String,
@@ -171,6 +501,16 @@ class MigrationsTest {
             statement.getLong(0)
         }
 
+    private fun triggerSql(
+        connection: SQLiteConnection,
+        trigger: String,
+    ): String =
+        connection.prepare("SELECT sql FROM sqlite_master WHERE type = 'trigger' AND name = ?").use { statement ->
+            statement.bindText(1, trigger)
+            check(statement.step()) { "No trigger $trigger" }
+            statement.getText(0)
+        }
+
     private fun indexColumn(
         connection: SQLiteConnection,
         index: String,
@@ -204,6 +544,10 @@ class MigrationsTest {
             for (i in 0 until indices.length()) {
                 connection.execSQL(indices.getJSONObject(i).getString("createSql").replace("\${TABLE_NAME}", name))
             }
+            val triggers = entity.optJSONArray("contentSyncTriggers") ?: continue
+            for (i in 0 until triggers.length()) {
+                connection.execSQL(triggers.getString(i))
+            }
         }
     }
 

app/src/test/kotlin/com/subtracks/data/db/QueryTimingMeasurementTest.kt

@@ -1,10 +1,9 @@
 package com.subtracks.data.db
 
-import android.content.Context
 import androidx.paging.PagingSource
-import androidx.room3.Room
+import androidx.room3.immediateTransaction
+import androidx.room3.useWriterConnection
 import androidx.sqlite.driver.bundled.BundledSQLiteDriver
-import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.data.model.Album
 import com.subtracks.data.model.Artist
@@ -12,6 +11,9 @@ import com.subtracks.data.model.Playlist
 import com.subtracks.data.model.PlaylistSong
 import com.subtracks.data.model.Song
 import com.subtracks.data.model.Source
+import com.subtracks.data.prefs.AlbumSort
+import com.subtracks.data.prefs.ArtistSort
+import com.subtracks.data.prefs.PlaylistSort
 import com.subtracks.data.source.MusicSource
 import com.subtracks.data.source.StarType
 import com.subtracks.data.sync.SyncService
@@ -35,9 +37,8 @@ class QueryTimingMeasurementTest {
 
     @Before
     fun setUp() {
-        val context = ApplicationProvider.getApplicationContext<Context>()
         val driver = LoggingSQLiteDriver(BundledSQLiteDriver()) { executions += it }
-        db = Room.inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java).setDriver(driver).build()
+        db = createTestDatabase(driver)
     }
 
     @After
@@ -61,6 +62,27 @@ class QueryTimingMeasurementTest {
             val secondSyncMs = wall { SyncService(db, source).sync() }
             val secondSyncExecutions = executions.toList()
 
+            db.useWriterConnection { connection ->
+                connection.immediateTransaction {
+                    connection.usePrepared(
+                        "INSERT INTO song_downloads (sourceId, songId, status, downloadedAt) VALUES (?, ?, ?, ?)",
+                    ) { statement ->
+                        (0 until songCount step 10).forEach { i ->
+                            statement.bindLong(1, 1L)
+                            statement.bindText(2, "s$i")
+                            statement.bindText(3, "Completed")
+                            statement.bindLong(4, i.toLong())
+                            statement.step()
+                            statement.reset()
+                            statement.clearBindings()
+                        }
+                    }
+                }
+            }
+            db.useWriterConnection { connection ->
+                connection.usePrepared("ANALYZE") { it.step() }
+            }
+
             executions.clear()
             measureReads()
             val readExecutions = executions.toList()
@@ -82,19 +104,37 @@ class QueryTimingMeasurementTest {
 
     private suspend fun measureReads() {
         val dao = db.libraryDao()
-        timed("albums first page (name)") { dao.albumsByName(1, 0, "").firstPage() }
-        timed("albums first page (artist)") { dao.albumsByArtist(1, 0, "").firstPage() }
-        timed("albums first page (year)") { dao.albumsByYear(1, 0, "").firstPage() }
-        timed("albums first page (added)") { dao.albumsByRecentlyAdded(1, 0, "").firstPage() }
-        timed("albums first page (starred)") { dao.albumsByStarred(1, 0, "").firstPage() }
-        timed("albums first page (frequent)") { dao.albumsByFrequent(1, 0, "").firstPage() }
-        timed("albums first page (recent)") { dao.albumsByRecent(1, 0, "").firstPage() }
-        timed("artists first page (name)") { dao.artistsByName(1, 0, "").firstPage() }
-        timed("artists first page (frequent)") { dao.artistsByFrequent(1, 0, "").firstPage() }
-        timed("playlists first page (name)") { dao.playlistsByName(1, "").firstPage() }
-        timed("albums deep page") { dao.albumsByName(1, 0, "").deepPage(1000) }
-        timed("albums search FTS") { dao.albumsByName(1, 0, "Album 1").firstPage() }
-        timed("albums search short") { dao.albumsByName(1, 0, "al").firstPage() }
+        timed("albums first page (name)") { dao.albumPages(1, 0, "", sort = AlbumSort.Name).firstPage() }
+        timed("albums first page (name, downloaded)") {
+            dao.albumPages(1, 0, "", sort = AlbumSort.Name, downloaded = true).firstPage()
+        }
+        timed("albums first page (artist)") { dao.albumPages(1, 0, "", sort = AlbumSort.Artist).firstPage() }
+        timed("albums first page (year)") { dao.albumPages(1, 0, "", sort = AlbumSort.Year).firstPage() }
+        timed("albums first page (added)") { dao.albumPages(1, 0, "", sort = AlbumSort.Added).firstPage() }
+        timed("albums first page (starred)") { dao.albumPages(1, 0, "", sort = AlbumSort.Starred).firstPage() }
+        timed("albums first page (frequent)") { dao.albumPages(1, 0, "", sort = AlbumSort.Frequent).firstPage() }
+        timed("albums first page (recent)") { dao.albumPages(1, 0, "", sort = AlbumSort.Recent).firstPage() }
+        timed("artists first page (name)") { dao.artistPages(1, 0, "", sort = ArtistSort.Name).firstPage() }
+        timed("artists first page (name, downloaded)") {
+            dao.artistPages(1, 0, "", sort = ArtistSort.Name, downloaded = true).firstPage()
+        }
+        timed("artists first page (frequent)") { dao.artistPages(1, 0, "", sort = ArtistSort.Frequent).firstPage() }
+        timed("artist albums") { dao.albumsForArtist(1, "ar0").first() }
+        timed("artist name") { dao.artistName(1, "ar0").first() }
+        timed("artist songs") { db.queueDao().artistSongs(1, "ar0", 0, 100) }
+        timed("artist length") { db.queueDao().artistLength(1, "ar0") }
+        timed("artist song ids") { db.queueDao().artistSongIds(1, "ar0") }
+        timed("downloaded artists") { dao.downloadedArtists(1).firstPage() }
+        timed("artists downloaded filter") { dao.artistPages(1, 0, "", downloaded = true).firstPage() }
+        timed("artist statuses") { db.downloadDao().artistStatuses(1).first() }
+        timed("artist status") { db.downloadDao().artistStatus(1, "ar0").first() }
+        timed("playlists first page (name)") { dao.playlistPages(1, "", sort = PlaylistSort.Name).firstPage() }
+        timed("playlists first page (name, downloaded)") {
+            dao.playlistPages(1, "", sort = PlaylistSort.Name, downloaded = true).firstPage()
+        }
+        timed("albums deep page") { dao.albumPages(1, 0, "", sort = AlbumSort.Name).deepPage(1000) }
+        timed("albums search FTS") { dao.albumPages(1, 0, "Album 1", sort = AlbumSort.Name).firstPage() }
+        timed("albums search short") { dao.albumPages(1, 0, "al", sort = AlbumSort.Name).firstPage() }
         timed("songs search FTS") { dao.searchSongs(1, "Song", 50).first() }
         timed("home recently played") { dao.recentlyPlayedAlbums(1, 20).first() }
         timed("home most played") { dao.mostPlayedAlbums(1, 20).first() }
@@ -102,7 +142,7 @@ class QueryTimingMeasurementTest {
         timed("home recently starred") { dao.recentlyStarredSongs(1, 20).first() }
         timed("home genres") { dao.genresByMostPlayed(1).first() }
         timed("home decades") { dao.decades(1).first() }
-        timed("recompute play data") { dao.recomputePlayData(1) }
+        timed("recompute aggregates") { dao.recomputeAggregates(1) }
     }
 
     private suspend fun <T : Any> PagingSource<Int, T>.firstPage(): List<T> =

app/src/test/kotlin/com/subtracks/data/db/TestDatabase.kt

@@ -0,0 +1,16 @@
+package com.subtracks.data.db
+
+import android.content.Context
+import androidx.room3.Room
+import androidx.sqlite.SQLiteDriver
+import androidx.sqlite.driver.bundled.BundledSQLiteDriver
+import androidx.test.core.app.ApplicationProvider
+
+fun createTestDatabase(driver: SQLiteDriver = BundledSQLiteDriver()): SubtracksDatabase {
+    val context = ApplicationProvider.getApplicationContext<Context>()
+    return Room
+        .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
+        .setDriver(driver)
+        .addSubtracksDatabaseCallbacks()
+        .build()
+}

app/src/test/kotlin/com/subtracks/data/model/ArtistRefsCodecTest.kt

@@ -0,0 +1,25 @@
+package com.subtracks.data.model
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class ArtistRefsCodecTest {
+    @Test
+    fun roundTripsNamesWithTheOldSeparatorsAndColons() {
+        val refs =
+            listOf(
+                ArtistRef("ar1", "Name\u001Ewith\u001Fseparators"),
+                ArtistRef("ar:2", "1:Colon Artist"),
+                ArtistRef("", ""),
+            )
+
+        assertEquals(refs, ArtistRefsCodec.decode(ArtistRefsCodec.encode(refs)))
+    }
+
+    @Test
+    fun decodesEmptyAndMalformedValuesAsEmpty() {
+        assertEquals(emptyList<ArtistRef>(), ArtistRefsCodec.decode(""))
+        assertEquals(emptyList<ArtistRef>(), ArtistRefsCodec.decode("not a ref"))
+        assertEquals(emptyList<ArtistRef>(), ArtistRefsCodec.decode("9:short4:name"))
+    }
+}

app/src/test/kotlin/com/subtracks/data/prefs/UserPreferencesTest.kt

@@ -51,6 +51,22 @@ class UserPreferencesTest {
             file.delete()
         }
 
+    @Test
+    fun theSortNameModeRoundTrips() =
+        runTest {
+            val file = File.createTempFile("user-prefs", ".preferences_pb").apply { delete() }
+            val store = PreferenceDataStoreFactory.create(scope = backgroundScope) { file }
+            val prefs = UserPreferences(store)
+
+            assertEquals(SortNameMode.Name, prefs.sortNameMode().first())
+
+            prefs.setSortNameMode(SortNameMode.NonLatin)
+
+            assertEquals(SortNameMode.NonLatin, prefs.sortNameMode().first())
+
+            file.delete()
+        }
+
     @Test
     fun theSelectedLibraryTabRoundTrips() =
         runTest {
@@ -210,13 +226,13 @@ class UserPreferencesTest {
         }
 
     @Test
-    fun replayGainDefaultsToTrackModeAndRoundTrips() =
+    fun replayGainDefaultsToAutoModeAndRoundTrips() =
         runTest {
             val file = File.createTempFile("user-prefs", ".preferences_pb").apply { delete() }
             val store = PreferenceDataStoreFactory.create(scope = backgroundScope) { file }
             val prefs = UserPreferences(store)
 
-            assertEquals(ReplayGainMode.Track, prefs.replayGainMode().first())
+            assertEquals(ReplayGainMode.Auto, prefs.replayGainMode().first())
             assertEquals(0f, prefs.replayGainPreampDb().first(), 0f)
 
             prefs.setReplayGainMode(ReplayGainMode.Album)
@@ -225,6 +241,9 @@ class UserPreferencesTest {
             assertEquals(ReplayGainMode.Album, prefs.replayGainMode().first())
             assertEquals(3.5f, prefs.replayGainPreampDb().first(), 0f)
 
+            prefs.setReplayGainMode(ReplayGainMode.Auto)
+            assertEquals(ReplayGainMode.Auto, prefs.replayGainMode().first())
+
             prefs.setReplayGainPreampDb(99f)
             assertEquals(MAX_REPLAY_GAIN_PREAMP_DB, prefs.replayGainPreampDb().first(), 0f)
 

app/src/test/kotlin/com/subtracks/data/repo/DownloadRepositoryTest.kt

@@ -3,13 +3,12 @@ package com.subtracks.data.repo
 import android.content.Context
 import android.content.res.Resources
 import android.net.Uri
-import androidx.room3.Room
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
 import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.awaitUntil
 import com.subtracks.cancelAndJoinBlocking
 import com.subtracks.data.db.SubtracksDatabase
+import com.subtracks.data.db.createTestDatabase
 import com.subtracks.data.download.ArtworkFetcher
 import com.subtracks.data.download.ArtworkStore
 import com.subtracks.data.download.FakeDownloadEngine
@@ -26,6 +25,7 @@ import com.subtracks.data.model.Song
 import com.subtracks.data.model.SongDownload
 import com.subtracks.data.model.Source
 import com.subtracks.data.model.SubsonicSource
+import com.subtracks.data.model.artistImageKey
 import com.subtracks.data.model.coverArtKey
 import com.subtracks.data.prefs.fakeUserPreferences
 import kotlinx.coroutines.CoroutineScope
@@ -36,6 +36,10 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import kotlinx.coroutines.test.runTest
 import okhttp3.OkHttpClient
+import okhttp3.mockwebserver.Dispatcher
+import okhttp3.mockwebserver.MockResponse
+import okhttp3.mockwebserver.MockWebServer
+import okhttp3.mockwebserver.RecordedRequest
 import org.junit.After
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
@@ -49,6 +53,7 @@ import org.junit.runner.RunWith
 import java.io.File
 import java.io.IOException
 import java.util.concurrent.CopyOnWriteArrayList
+import java.util.concurrent.TimeUnit
 
 @RunWith(AndroidJUnit4::class)
 class DownloadRepositoryTest {
@@ -65,11 +70,12 @@ class DownloadRepositoryTest {
     private val requestedArt = CopyOnWriteArrayList<String>()
     private val artFetchedAfterTheEngineRequest = CopyOnWriteArrayList<Boolean>()
     private var failArtworkFetch = false
+    private val failingArtUrls = CopyOnWriteArrayList<String>()
     private val fetcher =
         ArtworkFetcher { url ->
             requestedArt += url
             artFetchedAfterTheEngineRequest += engine.requests.isNotEmpty()
-            if (failArtworkFetch) throw IOException("boom")
+            if (failArtworkFetch || url in failingArtUrls) throw IOException("boom")
             byteArrayOf(1, 2, 3)
         }
 
@@ -77,11 +83,7 @@ class DownloadRepositoryTest {
     fun setUp() {
         val context = ApplicationProvider.getApplicationContext<Context>()
         resources = context.resources
-        db =
-            Room
-                .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                .setDriver(BundledSQLiteDriver())
-                .build()
+        db = createTestDatabase()
         artwork = ArtworkStore(File(context.cacheDir, "art-${System.nanoTime()}"))
         scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
         sources = SourceRepository(db, OkHttpClient(), prefs, artwork, scope = scope)
@@ -121,6 +123,49 @@ class DownloadRepositoryTest {
             assertEquals(DownloadStatus.Queued, row(1, "s1")?.status)
         }
 
+    @Test
+    fun aDownloadAlsoFetchesTheArtistsBiography() =
+        runTest {
+            val server = MockWebServer()
+            server.start()
+            try {
+                server.dispatcher =
+                    object : Dispatcher() {
+                        override fun dispatch(request: RecordedRequest): MockResponse =
+                            when (request.requestUrl!!.encodedPath) {
+                                "/rest/ping.view" -> {
+                                    MockResponse().setBody("<subsonic-response status=\"ok\"/>")
+                                }
+
+                                "/rest/getArtistInfo2.view" -> {
+                                    MockResponse().setBody(
+                                        "<subsonic-response status=\"ok\"><artistInfo2>" +
+                                            "<biography>Downloaded bio</biography>" +
+                                            "</artistInfo2></subsonic-response>",
+                                    )
+                                }
+
+                                else -> {
+                                    MockResponse().setResponseCode(404)
+                                }
+                            }
+                    }
+                seedLibrary(server.url("/").toString())
+
+                runBlocking { repository.download(1, "s1") }
+
+                await { artistBio(1, "ar1") != null }
+                assertEquals("Downloaded bio", artistBio(1, "ar1")?.biography)
+                var request = server.takeRequest(5, TimeUnit.SECONDS)!!
+                while (request.requestUrl!!.encodedPath != "/rest/getArtistInfo2.view") {
+                    request = server.takeRequest(5, TimeUnit.SECONDS)!!
+                }
+                assertEquals("ar1", request.requestUrl!!.queryParameter("id"))
+            } finally {
+                server.shutdown()
+            }
+        }
+
     @Test
     fun progressAndCompletionAreMirroredAndTheFileBecomesPlayable() =
         runTest {
@@ -296,7 +341,10 @@ class DownloadRepositoryTest {
         runTest {
             seedLibrary()
             writeFile(1, "s1", "audio")
-            runBlocking { repository.download(1, "s1") }
+            runBlocking {
+                repository.download(1, "s1")
+                db.libraryDao().upsertArtists(listOf(artist(ARTIST_ART).copy(downloadedCoverArts = listOf(ALBUM_ART))))
+            }
             val id = engine.requests.single().first
 
             runBlocking { repository.removeSource(1) }
@@ -304,6 +352,13 @@ class DownloadRepositoryTest {
             assertTrue(engine.cancelled.contains(id))
             assertFalse(file(1, "s1").exists())
             assertTrue(allRows().isEmpty())
+            assertTrue(
+                db
+                    .libraryDao()
+                    .artistOnce(1, "ar1")!!
+                    .downloadedCoverArts
+                    .isEmpty(),
+            )
         }
 
     @Test
@@ -333,6 +388,95 @@ class DownloadRepositoryTest {
             }
         }
 
+    @Test
+    fun startingADownloadStoresTheProviderArtistImageAndKeepsItUntilTheDownloadGoes() =
+        runTest {
+            seedLibrary()
+            runBlocking {
+                db.libraryDao().upsertArtists(listOf(artist(ARTIST_ART, artistImageUrl = "https://img.example/ar1.jpg")))
+            }
+
+            runBlocking { repository.download(1, "s1") }
+
+            assertTrue(requestedArt.contains("https://img.example/ar1.jpg"))
+            val key = artistImageKey(1, "ar1")
+            assertNotNull(artwork.uri(1, key))
+
+            runBlocking { repository.reconcile() }
+            assertNotNull(artwork.uri(1, key))
+
+            runBlocking { repository.remove(1, "s1") }
+            assertNull(artwork.uri(1, key))
+        }
+
+    @Test
+    fun providerArtworkForTheAlbumArtistSurvivesASweepAndGoesWithTheDownload() =
+        runTest {
+            seedLibrary()
+            runBlocking {
+                db.libraryDao().upsertArtists(
+                    listOf(
+                        artist(ARTIST_ART, "https://img.example/track.jpg").copy(id = "ar-track"),
+                        artist(ARTIST_ART, "https://img.example/album.jpg").copy(id = "ar-album"),
+                    ),
+                )
+                db.libraryDao().upsertAlbums(listOf(album(ALBUM_ART).copy(artistId = "ar-album")))
+                db.libraryDao().upsertSongs(listOf(db.libraryDao().songOnce(1, "s1")!!.copy(artistId = "ar-track")))
+            }
+
+            runBlocking { repository.download(1, "s1") }
+            val trackKey = artistImageKey(1, "ar-track")
+            val albumKey = artistImageKey(1, "ar-album")
+            assertNotNull(artwork.uri(1, trackKey))
+            assertNotNull(artwork.uri(1, albumKey))
+
+            runBlocking { repository.reconcile() }
+            assertNotNull(artwork.uri(1, trackKey))
+            assertNotNull(artwork.uri(1, albumKey))
+
+            runBlocking { repository.remove(1, "s1") }
+            assertNull(artwork.uri(1, trackKey))
+            assertNull(artwork.uri(1, albumKey))
+        }
+
+    @Test
+    fun aFailedProviderImageFetchCachesTheArtistCoverFallback() =
+        runTest {
+            seedLibrary()
+            runBlocking {
+                db.libraryDao().upsertArtists(listOf(artist(ARTIST_ART, artistImageUrl = "https://img.example/ar1.jpg")))
+            }
+            failingArtUrls += "https://img.example/ar1.jpg"
+
+            runBlocking { repository.download(1, "s1") }
+
+            assertNull(artwork.uri(1, artistImageKey(1, "ar1")))
+            assertNotNull(artwork.uri(1, coverArtKey(1, ARTIST_ART, false)))
+            assertNotNull(artwork.uri(1, coverArtKey(1, ARTIST_ART, true)))
+        }
+
+    @Test
+    fun completingADownloadMaterializesOnlyItsAlbumForOfflineArtistArt() =
+        runTest {
+            seedLibrary()
+            repository.start()
+            runBlocking { repository.download(1, "s1") }
+            val id = engine.requests.single().first
+
+            engine.complete(id, total = 100)
+            writeFile(1, "s1", "audio")
+            runBlocking { repository.reconcile() }
+
+            await { row(1, "s1")?.status == DownloadStatus.Completed }
+            assertEquals(
+                listOf(ALBUM_ART),
+                db.libraryDao().artistOnce(1, "ar1")!!.downloadedCoverArts,
+            )
+
+            runBlocking { repository.remove(1, "s1") }
+            assertEquals(emptyList<String>(), db.libraryDao().artistOnce(1, "ar1")!!.downloadedCoverArts)
+        }
+
     @Test
     fun downloadingASongAlsoStoresTheArtworkOfPlaylistsThatContainIt() =
         runTest {
@@ -647,7 +791,17 @@ class DownloadRepositoryTest {
                     ),
                 )
                 db.libraryDao().upsertArtists(
-                    listOf(Artist(sourceId = 1, id = "ar-guest", name = "Guest", albumCount = 0, starred = null, coverArt = null)),
+                    listOf(
+                        Artist(
+                            sourceId = 1,
+                            id = "ar-guest",
+                            name = "Guest",
+                            albumCount = 0,
+                            starred = null,
+                            coverArt = null,
+                            songCount = 1,
+                        ),
+                    ),
                 )
             }
 
@@ -682,7 +836,17 @@ class DownloadRepositoryTest {
                     ),
                 )
                 db.libraryDao().upsertArtists(
-                    listOf(Artist(sourceId = 1, id = "ar-guest", name = "Guest", albumCount = 0, starred = null, coverArt = null)),
+                    listOf(
+                        Artist(
+                            sourceId = 1,
+                            id = "ar-guest",
+                            name = "Guest",
+                            albumCount = 0,
+                            starred = null,
+                            coverArt = null,
+                            songCount = 1,
+                        ),
+                    ),
                 )
                 db.downloadDao().upsert(SongDownload(1, "s2", DownloadStatus.Completed))
             }
@@ -910,7 +1074,9 @@ class DownloadRepositoryTest {
                     ),
                 )
                 db.libraryDao().upsertArtists(
-                    listOf(Artist(sourceId = 1, id = "ar2", name = "Other", albumCount = 1, starred = null, coverArt = null)),
+                    listOf(
+                        Artist(sourceId = 1, id = "ar2", name = "Other", albumCount = 1, starred = null, coverArt = null, songCount = 1),
+                    ),
                 )
                 db.downloadDao().upsert(SongDownload(1, "s1", DownloadStatus.Completed))
                 db.downloadDao().upsert(SongDownload(1, "s3", DownloadStatus.Queued))
@@ -953,6 +1119,53 @@ class DownloadRepositoryTest {
             assertFalse(file(1, "s2").exists())
         }
 
+    @Test
+    fun downloadedSongsFollowTheAlbumDiscAndTrackOrder() =
+        runTest {
+            seedLibrary()
+            runBlocking {
+                db.libraryDao().upsertSongs(
+                    listOf(
+                        Song(
+                            sourceId = 1,
+                            id = "s0",
+                            albumId = "al1",
+                            artistId = "ar1",
+                            title = "Alpha",
+                            album = "Album",
+                            artist = "Artist",
+                            duration = 100,
+                            track = 3,
+                            disc = 1,
+                            starred = null,
+                            genre = null,
+                        ),
+                        Song(
+                            sourceId = 1,
+                            id = "s3",
+                            albumId = "al1",
+                            artistId = "ar1",
+                            title = "Zulu",
+                            album = "Album",
+                            artist = "Artist",
+                            duration = 100,
+                            track = 1,
+                            disc = 2,
+                            starred = null,
+                            genre = null,
+                        ),
+                    ),
+                )
+                listOf("s0", "s1", "s2", "s3").forEach {
+                    db.downloadDao().upsert(SongDownload(1, it, DownloadStatus.Completed))
+                }
+            }
+
+            val songs = runBlocking { repository.downloadedSongs(1).first() }
+
+            assertEquals(listOf("s1", "s2", "s0", "s3"), songs.map { it.songId })
+        }
+
     @Test
     fun theTreeGroupsAnAlbumUnderItsAlbumArtistNotEachTrackArtist() =
         runTest {
@@ -1165,12 +1378,23 @@ class DownloadRepositoryTest {
             songCount = 2,
         )
 
-    private fun artist(coverArt: String?) =
-        Artist(sourceId = 1, id = "ar1", name = "Artist", albumCount = 1, starred = null, coverArt = coverArt)
+    private fun artist(
+        coverArt: String?,
+        artistImageUrl: String? = null,
+    ) = Artist(
+        sourceId = 1,
+        id = "ar1",
+        name = "Artist",
+        albumCount = 1,
+        starred = null,
+        coverArt = coverArt,
+        artistImageUrl = artistImageUrl,
+        songCount = 2,
+    )
 
-    private fun seedLibrary() {
+    private fun seedLibrary(address: String = "http://localhost:4533/") {
         runBlocking {
-            db.sourcesDao().upsertSource(Source(1, "source", "http://localhost:4533/", isActive = true, createdAt = 0))
+            db.sourcesDao().upsertSource(Source(1, "source", address, isActive = true, createdAt = 0))
             db.sourcesDao().upsertSubsonicSource(SubsonicSource(1, "user", "pass"))
             db.libraryDao().upsertSongs(
                 listOf(
@@ -1220,6 +1444,11 @@ class DownloadRepositoryTest {
         songId: String,
     ): SongDownload? = runBlocking { db.downloadDao().find(sourceId, songId) }
 
+    private fun artistBio(
+        sourceId: Long,
+        artistId: String,
+    ) = runBlocking { db.libraryDao().artistBioOnce(sourceId, artistId) }
+
     private fun allRows(): List<SongDownload> = runBlocking { db.downloadDao().all() }
 
     private fun writeFile(

app/src/test/kotlin/com/subtracks/data/repo/LibraryRepositoryTest.kt

@@ -4,15 +4,18 @@ import android.content.Context
 import android.content.res.Resources
 import androidx.paging.PagingDataEvent
 import androidx.paging.PagingDataPresenter
-import androidx.room3.Room
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
 import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.cancelAndJoinBlocking
 import com.subtracks.data.db.SubtracksDatabase
+import com.subtracks.data.db.createTestDatabase
 import com.subtracks.data.download.ArtworkStore
 import com.subtracks.data.model.Album
+import com.subtracks.data.model.ArtistBio
+import com.subtracks.data.model.DownloadStatus
 import com.subtracks.data.model.Song
+import com.subtracks.data.model.SongDownload
+import com.subtracks.data.model.Source
 import com.subtracks.data.prefs.AlbumSort
 import com.subtracks.data.prefs.StarredFilter
 import com.subtracks.data.prefs.fakeUserPreferences
@@ -59,11 +62,7 @@ class LibraryRepositoryTest {
     fun setUp() {
         val context = ApplicationProvider.getApplicationContext<Context>()
         resources = context.resources
-        db =
-            Room
-                .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                .setDriver(BundledSQLiteDriver())
-                .build()
+        db = createTestDatabase()
         scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
         sourceRepository =
             SourceRepository(db, OkHttpClient(), fakeUserPreferences(), ArtworkStore(File(context.cacheDir, "art")), scope = scope)
@@ -72,6 +71,7 @@ class LibraryRepositoryTest {
                 db,
                 sourceRepository,
                 NetworkServerActionSink(sourceRepository),
+                fakeUserPreferences(),
                 showMessage = { messages += it.resolve(resources) },
                 scope = scope,
             )
@@ -203,6 +203,197 @@ class LibraryRepositoryTest {
             }
         }
 
+    @Test
+    fun theDownloadedAlbumGridOnlyPresentsDownloadedRows() =
+        runBlocking {
+            val sourceId = sourceRepository.addSource("nav", "http://localhost/", "u", "p", false)
+            db.libraryDao().upsertAlbums(listOf(seedAlbum(sourceId, 1), seedAlbum(sourceId, 2)))
+            db.libraryDao().upsertSongs(
+                listOf(
+                    seedSong(sourceId).copy(id = "s1", albumId = "al-0001"),
+                    seedSong(sourceId).copy(id = "s2", albumId = "al-0002"),
+                ),
+            )
+            db.downloadDao().upsert(SongDownload(sourceId, "s1", DownloadStatus.Completed))
+
+            val presenterDispatcher = Executors.newSingleThreadExecutor().asCoroutineDispatcher()
+            val presenter = RecordingPresenter(presenterDispatcher)
+            val job =
+                launch {
+                    repository
+                        .albums(
+                            sourceId = sourceId,
+                            sort = AlbumSort.Name,
+                            descending = false,
+                            starred = StarredFilter.Any,
+                            search = "",
+                            downloaded = true,
+                        ).collect { presenter.collectFrom(it) }
+                }
+            try {
+                awaitRefreshes(presenter, 1)
+                assertEquals(1, presented(presenter, presenterDispatcher))
+            } finally {
+                job.cancelAndJoin()
+                presenterDispatcher.close()
+            }
+        }
+
+    @Test
+    fun artistAlbumsSeparatesAlbumCreditsFromTrackAppearances() =
+        runBlocking {
+            val sourceId = 1L
+            db.sourcesDao().upsertSource(
+                Source(id = sourceId, name = "test", address = "http://localhost", isActive = true, createdAt = 0),
+            )
+            db.libraryDao().upsertAlbums(
+                listOf(
+                    seedAlbum(sourceId, 1),
+                    seedAlbum(sourceId, 2).copy(artistId = "ar2"),
+                ),
+            )
+            db.libraryDao().upsertSongs(
+                listOf(
+                    seedSong(sourceId).copy(albumId = "al-0001"),
+                    seedSong(sourceId).copy(id = "s2", albumId = "al-0002"),
+                ),
+            )
+
+            val albums = repository.artistAlbums(sourceId, "ar1").first()
+
+            assertEquals(listOf("al-0001"), albums.albumCredits.map { it.id })
+            assertEquals(listOf("al-0002"), albums.appearances.map { it.id })
+            assertEquals(2, albums.count)
+        }
+
+    @Test
+    fun downloadedArtistAlbumsKeepPerCreditVisibility() =
+        runBlocking {
+            val sourceId = 1L
+            db.sourcesDao().upsertSource(
+                Source(id = sourceId, name = "test", address = "http://localhost", isActive = true, createdAt = 0),
+            )
+            db.libraryDao().upsertAlbums(
+                listOf(
+                    seedAlbum(sourceId, 1),
+                    seedAlbum(sourceId, 2).copy(artistId = "ar2"),
+                ),
+            )
+            db.libraryDao().upsertSongs(
+                listOf(
+                    seedSong(sourceId).copy(albumId = "al-0001"),
+                    seedSong(sourceId).copy(id = "s2", albumId = "al-0002"),
+                    seedSong(sourceId).copy(id = "s3", albumId = "al-0002", artistId = "ar2"),
+                    seedSong(sourceId).copy(id = "s4", albumId = "al-0001", artistId = "ar2"),
+                ),
+            )
+
+            db.downloadDao().upsert(SongDownload(sourceId, "s4", DownloadStatus.Completed))
+            val otherOnAlbumCredit = repository.artistAlbums(sourceId, "ar1", downloaded = true).first()
+            assertEquals(listOf("al-0001"), otherOnAlbumCredit.albumCredits.map { it.id })
+            assertEquals(emptyList<String>(), otherOnAlbumCredit.appearances.map { it.id })
+
+            db.downloadDao().upsert(SongDownload(sourceId, "s3", DownloadStatus.Completed))
+            val otherOnTrackCredit = repository.artistAlbums(sourceId, "ar1", downloaded = true).first()
+            assertEquals(listOf("al-0001"), otherOnTrackCredit.albumCredits.map { it.id })
+            assertEquals(emptyList<String>(), otherOnTrackCredit.appearances.map { it.id })
+
+            db.downloadDao().upsert(SongDownload(sourceId, "s2", DownloadStatus.Completed))
+            val creditedTrack = repository.artistAlbums(sourceId, "ar1", downloaded = true).first()
+            assertEquals(listOf("al-0001"), creditedTrack.albumCredits.map { it.id })
+            assertEquals(listOf("al-0002"), creditedTrack.appearances.map { it.id })
+        }
+
+    @Test
+    fun refreshingAnArtistBioStoresItAndUpdatesItOnTheNextOpen() =
+        runBlocking {
+            withSource { server ->
+                val sourceId = sourceRepository.activeSourceIdOnce()!!
+                server.enqueue(artistInfo("First bio"))
+                assertTrue(repository.refreshArtistBio(sourceId, "ar1").isSuccess)
+                assertEquals("First bio", repository.artistBio(sourceId, "ar1").first()?.biography)
+
+                server.enqueue(artistInfo("Second bio"))
+                assertTrue(repository.refreshArtistBio(sourceId, "ar1").isSuccess)
+
+                assertEquals("Second bio", repository.artistBio(sourceId, "ar1").first()?.biography)
+                val first = server.takeRequest()
+                assertEquals("/rest/getArtistInfo2.view", first.requestUrl!!.encodedPath)
+                assertEquals("ar1", first.requestUrl!!.queryParameter("id"))
+                assertEquals("/rest/getArtistInfo2.view", server.takeRequest().requestUrl!!.encodedPath)
+            }
+        }
+
+    @Test
+    fun anArtistWithoutABioStillRecordsTheFetchedState() =
+        runBlocking {
+            withSource { server ->
+                val sourceId = sourceRepository.activeSourceIdOnce()!!
+                server.enqueue(
+                    MockResponse().setBody(
+                        "<subsonic-response status=\"ok\"><artistInfo2/></subsonic-response>",
+                    ),
+                )
+
+                assertTrue(repository.refreshArtistBio(sourceId, "ar1").isSuccess)
+
+                val bio = repository.artistBio(sourceId, "ar1").first()
+                assertNotNull(bio)
+                assertNull(bio?.biography)
+            }
+        }
+
+    @Test
+    fun anEmptyRefreshKeepsTheStoredBio() =
+        runBlocking {
+            withSource { server ->
+                val sourceId = sourceRepository.activeSourceIdOnce()!!
+                db.libraryDao().upsertArtistBio(ArtistBio(sourceId, "ar1", "Kept"))
+                server.enqueue(
+                    MockResponse().setBody(
+                        "<subsonic-response status=\"ok\"><artistInfo2/></subsonic-response>",
+                    ),
+                )
+
+                assertTrue(repository.refreshArtistBio(sourceId, "ar1").isSuccess)
+
+                assertEquals("Kept", repository.artistBio(sourceId, "ar1").first()?.biography)
+            }
+        }
+
+    @Test
+    fun biographiesKeepLineAndParagraphBreaks() {
+        assertEquals("Line one\nLine two", normalizeBiography("Line one\r\nLine two"))
+        assertEquals("Line one\nLine two", normalizeBiography("Line one\nLine two"))
+        assertEquals("One\n\nTwo", normalizeBiography("One   Two"))
+        assertEquals("One\n\nTwo", normalizeBiography("One\n\nTwo"))
+        assertNull(normalizeBiography("   "))
+    }
+
+    @Test
+    fun aPreviouslyStoredBioIsNormalizedWhenRead() =
+        runBlocking {
+            withSource {
+                val sourceId = sourceRepository.activeSourceIdOnce()!!
+                db.libraryDao().upsertArtistBio(ArtistBio(sourceId, "ar1", "One   Two"))
+                assertEquals("One\n\nTwo", repository.artistBio(sourceId, "ar1").first()?.biography)
+            }
+        }
+
+    @Test
+    fun aFailedRefreshKeepsTheStoredBio() =
+        runBlocking {
+            withSource { server ->
+                val sourceId = sourceRepository.activeSourceIdOnce()!!
+                db.libraryDao().upsertArtistBio(ArtistBio(sourceId, "ar1", "Kept"))
+                server.enqueue(MockResponse().setResponseCode(500))
+
+                assertTrue(repository.refreshArtistBio(sourceId, "ar1").isFailure)
+
+                assertEquals("Kept", repository.artistBio(sourceId, "ar1").first()?.biography)
+            }
+        }
+
     private suspend fun awaitRefreshes(
         presenter: RecordingPresenter,
         target: Int,
@@ -279,6 +470,13 @@ class LibraryRepositoryTest {
             genre = null,
         )
 
+    private fun artistInfo(biography: String) =
+        MockResponse().setBody(
+            "<subsonic-response status=\"ok\"><artistInfo2>" +
+                "<biography>$biography</biography>" +
+                "</artistInfo2></subsonic-response>",
+        )
+
     private fun ok() = MockResponse().setBody("<subsonic-response status=\"ok\" version=\"1.16.1\"/>")
 
     private fun failed(code: Int) =

app/src/test/kotlin/com/subtracks/data/repo/PendingServerActionSinkTest.kt

@@ -1,13 +1,10 @@
 package com.subtracks.data.repo
 
-import android.content.Context
-import androidx.room3.Room
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
-import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.awaitUntil
 import com.subtracks.cancelAndJoinBlocking
 import com.subtracks.data.db.SubtracksDatabase
+import com.subtracks.data.db.createTestDatabase
 import com.subtracks.data.model.PendingActionKind
 import com.subtracks.data.model.Source
 import com.subtracks.data.source.ServerActionSink
@@ -82,12 +79,7 @@ class PendingServerActionSinkTest {
 
     @Before
     fun setUp() {
-        val context = ApplicationProvider.getApplicationContext<Context>()
-        db =
-            Room
-                .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                .setDriver(BundledSQLiteDriver())
-                .build()
+        db = createTestDatabase()
         scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
         sourceId = runBlocking { db.sourcesDao().insertSource(Source(name = "server", address = "http://x/", createdAt = 0)) }
         delegate = RecordingSink()

app/src/test/kotlin/com/subtracks/data/repo/QueueKeysetTest.kt

@@ -1,12 +1,9 @@
 package com.subtracks.data.repo
 
-import android.content.Context
-import androidx.room3.Room
 import androidx.room3.useReaderConnection
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
-import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.data.db.SubtracksDatabase
+import com.subtracks.data.db.createTestDatabase
 import com.subtracks.data.model.Album
 import com.subtracks.data.model.PlaylistSong
 import com.subtracks.data.model.Song
@@ -26,12 +23,7 @@ class QueueKeysetTest {
 
     @Before
     fun setUp() {
-        val context = ApplicationProvider.getApplicationContext<Context>()
-        db =
-            Room
-                .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                .setDriver(BundledSQLiteDriver())
-                .build()
+        db = createTestDatabase()
         repository = QueueRepository(db)
     }
 
@@ -158,6 +150,18 @@ class QueueKeysetTest {
             assertTrue("backward keyset seeks", repository.keysetSeeks > beforeBackward)
         }
 
+    @Test
+    fun scanningAnAlbumWithNullDiscAndTrackForwardFallsBackToOffsetRows() =
+        runTest {
+            seedLibrary()
+            repository.replace(listOf(repository.albumEntry(1, "mixed")))
+            val snapshot = repository.snapshot()
+
+            val resolved = (0 until snapshot.size).map { repository.itemAt(snapshot, it)?.song?.id }
+
+            assertEquals(listOf("n1", "n2", "s1", "s2"), resolved)
+        }
+
     @Test
     fun scanningAnAlbumWithNullDiscAndTrackBackwardsResolvesEveryRow() =
         runTest {
@@ -268,6 +272,22 @@ class QueueKeysetTest {
             assertTrue(ids.all { it in expected })
         }
 
+    @Test
+    fun thePlaylistWindowQuerySeeksThePositionIndex() =
+        runTest {
+            seedLibrary()
+            val plan =
+                queryPlan(
+                    "SELECT songs.*, playlist_songs.position AS playlistPosition, albums.coverArt AS coverArt " +
+                        "FROM playlist_songs JOIN songs ON songs.sourceId = playlist_songs.sourceId " +
+                        "AND songs.id = playlist_songs.songId LEFT JOIN albums ON albums.sourceId = songs.sourceId " +
+                        "AND albums.id = songs.albumId WHERE playlist_songs.sourceId = 1 " +
+                        "AND playlist_songs.playlistId = 'pl1' ORDER BY playlist_songs.position LIMIT 51 OFFSET 100000",
+                )
+
+            assertTrue(plan.joinToString("\n"), plan.any { it.contains("sqlite_autoindex_playlist_songs_1") })
+        }
+
     @Test
     fun theAlbumKeysetQuerySeeksTheOrderIndex() =
         runTest {

app/src/test/kotlin/com/subtracks/data/repo/QueueRepositoryTest.kt

@@ -1,13 +1,10 @@
 package com.subtracks.data.repo
 
-import android.content.Context
-import androidx.room3.Room
 import androidx.room3.useReaderConnection
 import androidx.room3.useWriterConnection
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
-import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.data.db.SubtracksDatabase
+import com.subtracks.data.db.createTestDatabase
 import com.subtracks.data.model.Album
 import com.subtracks.data.model.DownloadStatus
 import com.subtracks.data.model.Playlist
@@ -33,12 +30,7 @@ class QueueRepositoryTest {
 
     @Before
     fun setUp() {
-        val context = ApplicationProvider.getApplicationContext<Context>()
-        db =
-            Room
-                .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                .setDriver(BundledSQLiteDriver())
-                .build()
+        db = createTestDatabase()
         repository = QueueRepository(db)
     }
 
@@ -485,6 +477,80 @@ class QueueRepositoryTest {
             repository.move(repository.snapshot(), from = 2, to = 1)
 
             assertEquals(listOf("s1", "s5", "s4", "s2", "s3"), resolveAll(repository.snapshot()))
+            val (entry, _) = repository.snapshot().locate(1)!!
+            assertEquals(QueueKind.Song, entry.kind)
+        }
+
+    @Test
+    fun movingAQueuedAlbumTrackKeepsItsAlbumEntry() =
+        runTest {
+            seedLibrary()
+            val snapshot = repository.snapshotAfter(listOf(repository.albumEntry(1, "al1")))
+            repository.addUpNext(snapshot, currentPosition = 0, entry = repository.albumEntry(1, "al2"), playNext = false)
+
+            repository.move(repository.snapshot(), from = 2, to = 1)
+
+            val (entry, _) = repository.snapshot().locate(1)!!
+            assertEquals(QueueKind.Album, entry.kind)
+            assertEquals("al2", entry.refId)
+            assertEquals(1L, entry.rangeStart)
+            assertEquals(1L, entry.rangeEnd)
+        }
+
+    @Test
+    fun movingARangedAlbumTrackInUpNextKeepsTheAbsoluteOffsets() =
+        runTest {
+            seedLibrary()
+            db.libraryDao().upsertSongs(
+                listOf(
+                    song("s6", "al1", track = 4, album = "First Album"),
+                    song("s7", "al1", track = 5, album = "First Album"),
+                    song("x1", "al3", track = 1),
+                ),
+            )
+            val snapshot = repository.snapshotAfter(listOf(repository.albumEntry(1, "al2")))
+            repository.addUpNext(snapshot, currentPosition = 0, entry = albumRange(1, 4), playNext = false)
+            repository.addUpNext(
+                repository.snapshot(),
+                currentPosition = 0,
+                entry = repository.songEntry(1, "x1"),
+                playNext = false,
+            )
+            assertEquals(listOf("s4", "s2", "s3", "s6", "s7", "x1", "s5"), resolveAll(repository.snapshot()))
+
+            repository.move(repository.snapshot(), from = 4, to = 5)
+
+            var updated = repository.snapshot()
+            assertEquals(listOf("s4", "s2", "s3", "s6", "x1", "s7", "s5"), resolveAll(updated))
+            val moved = updated.locate(5)!!.first
+            assertEquals(QueueKind.Album, moved.kind)
+            assertEquals(4L, moved.rangeStart)
+            assertEquals(4L, moved.rangeEnd)
+
+            repository.move(repository.snapshot(), from = 5, to = 4)
+
+            updated = repository.snapshot()
+            assertEquals(listOf("s4", "s2", "s3", "s6", "s7", "x1", "s5"), resolveAll(updated))
+            assertTrue(updated.isAlbumContext(4))
+        }
+
+    @Test
+    fun movingAPlaylistTrackKeepsItAPinnedSong() =
+        runTest {
+            seedLibrary()
+            db.libraryDao().upsertPlaylistSongs(
+                listOf(
+                    PlaylistSong(1, "p1", "s1", 0),
+                    PlaylistSong(1, "p1", "s4", 1),
+                ),
+            )
+            repository.snapshotAfter(listOf(repository.playlistEntry(1, "p1")))
+
+            repository.move(repository.snapshot(), from = 0, to = 1)
+
+            val (entry, _) = repository.snapshot().locate(1)!!
+            assertEquals(QueueKind.Song, entry.kind)
+            assertEquals("s1", entry.refId)
         }
 
     @Test
@@ -661,6 +727,32 @@ class QueueRepositoryTest {
             assertEquals(listOf("s1", "s2", "s3"), resolveAll(restored))
         }
 
+    @Test
+    fun shuffledLargeContextWindowOnlyResolvesRequestedRows() =
+        runTest {
+            seedLibrary()
+            db.libraryDao().upsertPlaylists(listOf(playlist("huge", "Huge")))
+            db.useWriterConnection { transactor ->
+                transactor.usePrepared(
+                    "WITH RECURSIVE n(x) AS (VALUES(0) UNION ALL SELECT x + 1 FROM n WHERE x < 199999) " +
+                        "INSERT INTO playlist_songs SELECT 1, 'huge', 's1', x FROM n",
+                ) { statement ->
+                    statement.step()
+                }
+            }
+            repository.snapshotAfter(listOf(repository.playlistEntry(1, "huge")))
+            repository.setShuffle(42L)
+            val snapshot = repository.snapshot()
+
+            val window = repository.window(snapshot, center = 100_000, radius = 25)
+
+            assertEquals(200_000L, snapshot.contextSize)
+            assertEquals(51, window.size)
+            assertEquals(51L, repository.resolvedRowCount)
+            assertEquals((99_975L..100_025L).toList(), window.map { it.position })
+            assertTrue(window.all { it.item.song.id == "s1" })
+        }
+
     @Test
     fun shuffledRangeResolvesEntriesInPositionOrder() =
         runTest {
@@ -785,6 +877,55 @@ class QueueRepositoryTest {
             }
         }
 
+    @Test
+    fun contextIndexUsesTheFirstDuplicateOrdinalAcrossSparsePositions() =
+        runTest {
+            seedLibrary()
+            db.libraryDao().upsertPlaylists(listOf(playlist("duplicates", "Duplicates")))
+            db.libraryDao().upsertPlaylistSongs(
+                listOf(
+                    PlaylistSong(1, "duplicates", "s2", 10),
+                    PlaylistSong(1, "duplicates", "s1", 20),
+                    PlaylistSong(1, "duplicates", "s2", 30),
+                ),
+            )
+            val snapshot = repository.snapshotAfter(listOf(repository.playlistEntry(1, "duplicates")))
+
+            assertEquals(0L, repository.combinedContextIndexOf(snapshot, "s2"))
+            assertEquals(1L, repository.combinedContextIndexOf(snapshot, "s1"))
+        }
+
+    @Test
+    fun contextIndexFindsADuplicateInsideTheEntryRange() =
+        runTest {
+            seedLibrary()
+            db.libraryDao().upsertPlaylists(listOf(playlist("duplicates", "Duplicates")))
+            db.libraryDao().upsertPlaylistSongs(
+                listOf(
+                    PlaylistSong(1, "duplicates", "s2", 10),
+                    PlaylistSong(1, "duplicates", "s1", 20),
+                    PlaylistSong(1, "duplicates", "s2", 30),
+                ),
+            )
+            val entry = repository.playlistEntry(1, "duplicates").copy(rangeStart = 1, rangeEnd = 2)
+            val snapshot = repository.snapshotAfter(listOf(entry))
+
+            assertEquals(1L, repository.combinedContextIndexOf(snapshot, "s2"))
+        }
+
+    @Test
+    fun contextIndexFallsBackToBoundedRowsForGenre() =
+        runTest {
+            seedLibrary()
+            insertGenre("s1", "Rock")
+            insertGenre("s3", "Rock")
+            insertGenre("s4", "Rock")
+            val snapshot = repository.snapshotAfter(listOf(repository.genreEntry(1, "Rock")))
+
+            assertEquals(2L, repository.combinedContextIndexOf(snapshot, "s4"))
+            assertTrue(repository.resolvedRowCount <= QUEUE_CHUNK)
+        }
+
     @Test
     fun upNextCombinedIndexOfCountsFromTheAnchorIntoTheBlock() =
         runTest {
@@ -853,11 +994,75 @@ class QueueRepositoryTest {
             repository.move(repository.snapshot(), from = 0, to = 2)
 
             val (entry, _) = repository.snapshot().locate(2)!!
-            assertEquals(QueueKind.Song, entry.kind)
-            assertEquals("s1", entry.refId)
+            assertEquals(QueueKind.Album, entry.kind)
+            assertEquals("al1", entry.refId)
+            assertEquals(0L, entry.rangeStart)
+            assertEquals(0L, entry.rangeEnd)
             assertEquals("First Album", repository.sourceName(entry.kind, entry.sourceId, entry.refId))
         }
 
+    @Test
+    fun movingWithinARangedAlbumKeepsTheAbsoluteOffsets() =
+        runTest {
+            seedLibrary()
+            db.libraryDao().upsertSongs(
+                listOf(
+                    song("s6", "al1", track = 4, album = "First Album"),
+                    song("s7", "al1", track = 5, album = "First Album"),
+                ),
+            )
+            repository.snapshotAfter(listOf(albumRange(1, 4)))
+            assertEquals(listOf("s2", "s3", "s6", "s7"), resolveAll(repository.snapshot()))
+
+            repository.move(repository.snapshot(), from = 0, to = 2)
+
+            val snapshot = repository.snapshot()
+            assertEquals(listOf("s3", "s6", "s2", "s7"), resolveAll(snapshot))
+            val (entry, _) = snapshot.locate(2)!!
+            assertEquals(QueueKind.Album, entry.kind)
+            assertEquals(1L, entry.rangeStart)
+            assertEquals(1L, entry.rangeEnd)
+        }
+
+    @Test
+    fun movingBackwardWithinARangedAlbumKeepsTheAbsoluteOffsets() =
+        runTest {
+            seedLibrary()
+            db.libraryDao().upsertSongs(
+                listOf(
+                    song("s6", "al1", track = 4, album = "First Album"),
+                    song("s7", "al1", track = 5, album = "First Album"),
+                ),
+            )
+            repository.snapshotAfter(listOf(albumRange(1, 4)))
+
+            repository.move(repository.snapshot(), from = 3, to = 0)
+
+            val snapshot = repository.snapshot()
+            assertEquals(listOf("s7", "s2", "s3", "s6"), resolveAll(snapshot))
+            val (entry, _) = snapshot.locate(0)!!
+            assertEquals(QueueKind.Album, entry.kind)
+            assertEquals(4L, entry.rangeStart)
+            assertEquals(4L, entry.rangeEnd)
+        }
+
+    @Test
+    fun movingAnAlbumTrackBackCompactsTheAlbumEntry() =
+        runTest {
+            seedLibrary()
+            repository.replace(listOf(repository.albumEntry(1, "al1")))
+
+            repository.move(repository.snapshot(), from = 0, to = 2)
+            repository.move(repository.snapshot(), from = 2, to = 0)
+
+            val snapshot = repository.snapshot()
+            assertEquals(listOf("s1", "s2", "s3"), resolveAll(snapshot))
+            val entry = snapshot.entries.single().entry
+            assertEquals(QueueKind.Album, entry.kind)
+            assertEquals(0L, entry.rangeStart)
+            assertEquals(2L, entry.rangeEnd)
+        }
+
     @Test
     fun anAlbumSplitByRemovalIsStillLabeledByItsAlbum() =
         runTest {

app/src/test/kotlin/com/subtracks/data/repo/SourceRepositoryTest.kt

@@ -2,15 +2,15 @@ package com.subtracks.data.repo
 
 import android.content.Context
 import android.content.res.Resources
-import androidx.room3.Room
-import androidx.sqlite.driver.bundled.BundledSQLiteDriver
 import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.TEST_TIMEOUT_MS
 import com.subtracks.cancelAndJoinBlocking
 import com.subtracks.data.db.SubtracksDatabase
+import com.subtracks.data.db.createTestDatabase
 import com.subtracks.data.download.ArtworkStore
 import com.subtracks.data.model.CoverArtRef
+import com.subtracks.data.model.artistImageKey
 import com.subtracks.data.model.coverArtKey
 import com.subtracks.data.prefs.StreamQuality
 import com.subtracks.data.prefs.UserPreferences
@@ -33,6 +33,7 @@ import okhttp3.mockwebserver.RecordedRequest
 import org.junit.After
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNull
 import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.Test
@@ -56,11 +57,7 @@ class SourceRepositoryTest {
     fun setUp() {
         val context = ApplicationProvider.getApplicationContext<Context>()
         resources = context.resources
-        db =
-            Room
-                .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
-                .setDriver(BundledSQLiteDriver())
-                .build()
+        db = createTestDatabase()
         artwork = ArtworkStore(File(context.cacheDir, "art-${System.nanoTime()}"))
         prefs = fakeUserPreferences()
         scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
@@ -283,7 +280,36 @@ class SourceRepositoryTest {
             assertTrue("expected the stored file, was ${ref.url}", ref.url.startsWith("file:"))
         }
 
-    private suspend fun awaitActiveSourceId(): Long = withTimeout(TEST_TIMEOUT_MS) { repository.activeSourceId().first { it != null }!! }
+    @Test
+    fun activeSourceBecomesReadyAfterThePreferencesLoad() =
+        runBlocking {
+            repository.addSource("nav", "http://a.example/", "u", "p", false)
+
+            val active = withTimeout(TEST_TIMEOUT_MS) { repository.activeSource.first { it != null } }
+            assertEquals(repository.activeSourceId().first(), active)
+        }
+
+    @Test
+    fun artistImageUsesTheNetworkOnlineAndOnlyCachedFilesOffline() =
+        runBlocking {
+            repository.addSource("nav", "http://a.example/", "u", "p", false)
+            val sourceId = awaitActiveSourceId()
+            val url = "https://img.example/ar1.jpg"
+            val online = withTimeout(TEST_TIMEOUT_MS) { repository.artistImage("ar1", url) }
+            assertEquals(url, online?.url)
+
+            val key = artistImageKey(sourceId, "ar1")
+            artwork.write(sourceId, key, byteArrayOf(1, 2, 3))
+            assertEquals(artwork.uri(sourceId, key), repository.artistImage("ar1", url)?.url)
+
+            repository.setOfflineMode(true)
+            withTimeout(TEST_TIMEOUT_MS) { repository.offline.first { it } }
+
+            assertEquals(artwork.uri(sourceId, key), repository.artistImage("ar1", url)?.url)
+            assertNull(repository.artistImage("ar2", "https://img.example/ar2.jpg"))
+        }
+
+    private suspend fun awaitActiveSourceId(): Long = withTimeout(TEST_TIMEOUT_MS) { repository.activeSource.first { it != null }!! }
 
     private suspend fun awaitCoverArt(coverArt: String): CoverArtRef =
         withTimeout(TEST_TIMEOUT_MS) {