keep playback running when offline mode is toggled, and swap the recently-added header icon

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

@@ -1321,8 +1321,7 @@ class PlaybackController(
             if (snapshot.size == 0L) return@withLock
             downloads.awaitLoaded()
             val current = currentPosition() ?: return@withLock
-            val positionMs = player.currentPositionMs
+            windowJob?.cancel()
-            val autoplay = player.playWhenReady
             val target =
                 if (offline) {
                     downloadedAtOrAfter(snapshot, current) ?: run {
@@ -1332,9 +1331,15 @@ class PlaybackController(
                 } else {
                     current
                 }
-            windowJob?.cancel()
             queueRepository.setCursor(target)
-            loadWindow(target, autoplay = autoplay, startPositionMs = if (target == current) positionMs else 0)
+            if (target == current) {
+                // Keep the playing item in place and only add/remove its neighbours, so a downloaded
+                // track does not re-prepare (and audibly gap) when offline mode is toggled.
+                rebuildWindow(queueRepository.window(snapshot, target, QUEUE_WINDOW_RADIUS), target)
+                refresh(target)
+            } else {
+                loadWindow(target, autoplay = player.playWhenReady, startPositionMs = 0)
+            }
         }
 
     private fun movedCursor(

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

@@ -27,9 +27,9 @@ import androidx.compose.material.icons.rounded.CalendarMonth
 import androidx.compose.material.icons.rounded.Category
 import androidx.compose.material.icons.rounded.Groups
 import androidx.compose.material.icons.rounded.History
+import androidx.compose.material.icons.rounded.LibraryAdd
 import androidx.compose.material.icons.rounded.LocalFireDepartment
 import androidx.compose.material.icons.rounded.MusicNote
-import androidx.compose.material.icons.rounded.NewReleases
 import androidx.compose.material.icons.rounded.Person
 import androidx.compose.material.icons.rounded.Replay
 import androidx.compose.material.icons.rounded.Star
@@ -496,7 +496,7 @@ private val HomeSection.icon: ImageVector
             HomeSection.Genres -> Icons.Rounded.Category
             HomeSection.Decades -> Icons.Rounded.CalendarMonth
             HomeSection.RecentlyStarredSongs -> Icons.Rounded.Star
-            HomeSection.RecentlyAddedAlbums -> Icons.Rounded.NewReleases
+            HomeSection.RecentlyAddedAlbums -> Icons.Rounded.LibraryAdd
             HomeSection.Rediscover -> Icons.Rounded.Replay
         }
 

app/src/test/kotlin/com/subtracks/playback/PlaybackControllerTest.kt

@@ -2535,7 +2535,8 @@ class PlaybackControllerTest {
         handle.operations.clear()
         setOnline()
 
-        await { handle.operations.any { it.startsWith("setWindow") } }
+        await { handle.operations.any { it.startsWith("add") } }
+        assertFalse(handle.operations.any { it.startsWith("setWindow") })
         assertEquals(
             "s5",
             controller.state.value.item
@@ -2801,7 +2802,8 @@ class PlaybackControllerTest {
 
         setOffline()
 
-        await { handle.operations.any { it.startsWith("setWindow") } }
+        await { handle.operations.any { it.startsWith("remove") || it.startsWith("add") } }
+        assertFalse(handle.operations.any { it.startsWith("setWindow") })
         assertEquals(
             "s2",
             controller.state.value.item