Show embedded album art for local songs missing a cached cover

UnifiedTrack.artworkUri now falls back to the audio file's file:// URI when
the scan didn't cache a JPG (or it was evicted), so the registered
AudioFileCoverFetcher extracts the embedded picture on demand for the song
list — matching the fallback toLegacyTrack() already does for the player.

Layer the music-note placeholder behind the cover in the local SongList row
so tracks that genuinely have no art still show the icon instead of a blank.

Author: tryptz

app/src/main/java/tf/monochrome/android/data/local/repository/LocalMediaRepository.kt

@@ -18,6 +18,7 @@ import tf.monochrome.android.domain.model.TrackLyrics
 import tf.monochrome.android.domain.model.UnifiedAlbum
 import tf.monochrome.android.domain.model.UnifiedArtist
 import tf.monochrome.android.domain.model.UnifiedTrack
+import java.io.File
 import javax.inject.Inject
 import javax.inject.Singleton
 
@@ -113,7 +114,12 @@ class LocalMediaRepository @Inject constructor(
                 albumArtistName = albumArtist,
                 albumTitle = album,
                 albumId = albumId?.let { "local_album_$it" },
-                artworkUri = artworkCacheKey,
+                // Fall back to the audio file's own file:// URI when the scan
+                // didn't cache a JPG (or it was evicted). The registered
+                // AudioFileCoverFetcher extracts the embedded picture on demand,
+                // so song rows show the cover even on cache misses — matching
+                // what toLegacyTrack() already does for the player.
+                artworkUri = artworkCacheKey ?: android.net.Uri.fromFile(File(filePath)).toString(),
                 codec = codec,
                 sampleRate = sampleRate,
                 bitDepth = bitDepth,

app/src/main/java/tf/monochrome/android/ui/library/LocalLibraryTab.kt

@@ -601,24 +601,27 @@ fun SongList(
                         .padding(horizontal = MonoDimens.listItemPaddingH, vertical = MonoDimens.spacingSm),
                     verticalAlignment = Alignment.CenterVertically
                 ) {
-                    if (track.artworkUri != null) {
-                        AsyncImage(
-                            model = track.artworkUri,
+                    // Music-note placeholder sits underneath the artwork: if the
+                    // cover loads (cached JPG, sidecar, or embedded art pulled on
+                    // demand by AudioFileCoverFetcher) it covers the icon; if the
+                    // file genuinely has no art the icon stays visible.
+                    Box(
+                        modifier = Modifier
+                            .size(48.dp)
+                            .clip(MonoDimens.shapeSm),
+                        contentAlignment = Alignment.Center
+                    ) {
+                        Icon(
+                            Icons.Default.MusicNote,
                             contentDescription = null,
-                            contentScale = ContentScale.Crop,
-                            modifier = Modifier
-                                .size(48.dp)
-                                .clip(MonoDimens.shapeSm)
+                            tint = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f)
                         )
-                    } else {
-                        Box(
-                            modifier = Modifier.size(48.dp),
-                            contentAlignment = Alignment.Center
-                        ) {
-                            Icon(
-                                Icons.Default.MusicNote,
+                        if (track.artworkUri != null) {
+                            AsyncImage(
+                                model = track.artworkUri,
                                 contentDescription = null,
-                                tint = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f)
+                                contentScale = ContentScale.Crop,
+                                modifier = Modifier.matchParentSize()
                             )
                         }
                     }