address the adversarial review findings

- restore the library sync control removed when the tab bar was reworked, with a test that clicks it
- lift the search field above the tab bar instead of overlapping it
- give the tabs and settings/sync buttons 48dp touch targets
- drop the duplicated label semantics on tabs
- animate the library bottom inset so the bar does not jump when the mini player enters/exits
- remove imports and a parameter left dead by the header rework

app/src/test/kotlin/com/subtracks/ui/LibraryScreenTest.kt

@@ -0,0 +1,64 @@
+package com.subtracks.ui
+
+import androidx.activity.ComponentActivity
+import androidx.compose.runtime.remember
+import androidx.compose.ui.test.junit4.v2.createAndroidComposeRule
+import androidx.compose.ui.test.onNodeWithContentDescription
+import androidx.compose.ui.test.performClick
+import androidx.paging.PagingData
+import androidx.paging.compose.collectAsLazyPagingItems
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.github.takahirom.roborazzi.RobolectricDeviceQualifiers
+import com.subtracks.data.model.Album
+import com.subtracks.data.model.Artist
+import com.subtracks.data.model.Playlist
+import com.subtracks.data.model.SongListItem
+import com.subtracks.ui.library.LibraryScreen
+import com.subtracks.ui.library.LibraryTab
+import com.subtracks.ui.theme.SubtracksTheme
+import kotlinx.coroutines.flow.flowOf
+import org.junit.Assert.assertTrue
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.annotation.Config
+import org.robolectric.annotation.GraphicsMode
+
+@RunWith(AndroidJUnit4::class)
+@GraphicsMode(GraphicsMode.Mode.NATIVE)
+@Config(qualifiers = RobolectricDeviceQualifiers.PixelXL)
+class LibraryScreenTest {
+    @get:Rule
+    val composeRule = createAndroidComposeRule<ComponentActivity>()
+
+    @Test
+    fun theSyncAndSettingsControlsAreReachable() {
+        var synced = false
+        var settingsOpened = false
+        composeRule.setContent {
+            SubtracksTheme {
+                LibraryScreen(
+                    selectedTab = LibraryTab.Albums,
+                    onTabSelected = {},
+                    albums = remember { flowOf(PagingData.empty<Album>()) }.collectAsLazyPagingItems(),
+                    artists = remember { flowOf(PagingData.empty<Artist>()) }.collectAsLazyPagingItems(),
+                    songs = remember { flowOf(PagingData.empty<SongListItem>()) }.collectAsLazyPagingItems(),
+                    playlists = remember { flowOf(PagingData.empty<Playlist>()) }.collectAsLazyPagingItems(),
+                    coverArt = { _, _ -> null },
+                    onAlbumClick = {},
+                    onArtistClick = {},
+                    onPlaylistClick = {},
+                    onSongClick = {},
+                    onSync = { synced = true },
+                    onOpenSettings = { settingsOpened = true },
+                )
+            }
+        }
+
+        composeRule.onNodeWithContentDescription("Sync").performClick()
+        composeRule.onNodeWithContentDescription("Settings").performClick()
+
+        assertTrue("the sync control should trigger a sync", synced)
+        assertTrue("the settings control should open settings", settingsOpened)
+    }
+}