feat(android): shuffle + repeat on NowPlaying

Closes audit #3 — PlayerController gains toggleShuffle / cycleRepeat
methods backed by Media3's Player.shuffleModeEnabled +
Player.repeatMode. PlayerUiState surfaces both via a new
shuffleEnabled flag and a RepeatMode enum (OFF/ALL/ONE) mapped
from Media3's int constants.

NowPlaying's BottomActionsRow grows two IconButtons: shuffle
toggles (accent when on, muted when off) and repeat cycles
off → all → one → off (Lucide.Repeat ↔ Lucide.Repeat1 swap;
accent when not-off).

PlayerViewModel exposes the two new methods as thin pass-throughs
matching the existing transport pattern.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/app/src/main/java/com/fabledsword/minstrel/player/PlayerController.kt

@@ -78,6 +78,27 @@ class PlayerController @Inject constructor(
     fun skipToNext() { mediaController?.seekToNextMediaItem() }
     fun skipToPrevious() { mediaController?.seekToPreviousMediaItem() }
 
+    /** Flip shuffle on/off. Media3 emits onEvents → uiState reflects. */
+    fun toggleShuffle() {
+        val controller = mediaController ?: return
+        controller.shuffleModeEnabled = !controller.shuffleModeEnabled
+    }
+
+    /**
+     * Cycles the player's repeat mode: off → all → one → off. Mirrors
+     * Flutter's `cycleRepeat`. The wire order (none/all/one) matches
+     * what the Now Playing icon swap expects — Lucide.Repeat for off
+     * and all, Lucide.Repeat1 for one.
+     */
+    fun cycleRepeat() {
+        val controller = mediaController ?: return
+        controller.repeatMode = when (controller.repeatMode) {
+            Player.REPEAT_MODE_OFF -> Player.REPEAT_MODE_ALL
+            Player.REPEAT_MODE_ALL -> Player.REPEAT_MODE_ONE
+            else -> Player.REPEAT_MODE_OFF
+        }
+    }
+
     /** Jump to [index] in the current queue. No-op if index is out of range. */
     fun seekToIndex(index: Int) {
         val controller = mediaController ?: return
@@ -179,6 +200,12 @@ class PlayerController @Inject constructor(
                             bufferedPositionMs = player.bufferedPosition.coerceAtLeast(0),
                             playbackError = player.playerError?.message,
                             currentSource = source,
+                            shuffleEnabled = player.shuffleModeEnabled,
+                            repeatMode = when (player.repeatMode) {
+                                Player.REPEAT_MODE_ALL -> RepeatMode.ALL
+                                Player.REPEAT_MODE_ONE -> RepeatMode.ONE
+                                else -> RepeatMode.OFF
+                            },
                         )
                 }
             },

android/app/src/main/java/com/fabledsword/minstrel/player/PlayerUiState.kt

@@ -2,6 +2,13 @@ package com.fabledsword.minstrel.player
 
 import com.fabledsword.minstrel.models.TrackRef
 
+/**
+ * Cycle on the repeat button: off → all → one → off. Mirrors
+ * `AudioServiceRepeatMode` in flutter_client and maps directly to
+ * the three Media3 `Player.REPEAT_MODE_*` int constants.
+ */
+enum class RepeatMode { OFF, ALL, ONE }
+
 /**
  * Snapshot of what the player is doing, for the UI to read via
  * [PlayerController.uiState]. Replaces the audio_service-style
@@ -19,4 +26,6 @@ data class PlayerUiState(
     val bufferedPositionMs: Long = 0,
     val playbackError: String? = null,
     val currentSource: String? = null,
+    val shuffleEnabled: Boolean = false,
+    val repeatMode: RepeatMode = RepeatMode.OFF,
 )

android/app/src/main/java/com/fabledsword/minstrel/player/ui/NowPlayingScreen.kt

@@ -43,8 +43,12 @@ import com.composables.icons.lucide.Lucide
 import com.composables.icons.lucide.Music
 import com.composables.icons.lucide.Pause
 import com.composables.icons.lucide.Play
+import com.composables.icons.lucide.Repeat
+import com.composables.icons.lucide.Repeat1
+import com.composables.icons.lucide.Shuffle
 import com.composables.icons.lucide.SkipBack
 import com.composables.icons.lucide.SkipForward
+import com.fabledsword.minstrel.player.RepeatMode
 import com.fabledsword.minstrel.nav.AlbumDetail
 import com.fabledsword.minstrel.nav.ArtistDetail
 import com.fabledsword.minstrel.nav.Queue
@@ -121,7 +125,14 @@ fun NowPlayingScreen(
                 onNext = viewModel::skipToNext,
             )
             Spacer(Modifier.height(16.dp))
-            BottomActionsRow(navController = navController, track = track)
+            BottomActionsRow(
+                navController = navController,
+                track = track,
+                shuffleEnabled = state.shuffleEnabled,
+                repeatMode = state.repeatMode,
+                onToggleShuffle = viewModel::toggleShuffle,
+                onCycleRepeat = viewModel::cycleRepeat,
+            )
         }
     }
 }
@@ -130,11 +141,35 @@ fun NowPlayingScreen(
 private fun BottomActionsRow(
     navController: NavHostController,
     track: com.fabledsword.minstrel.models.TrackRef,
+    shuffleEnabled: Boolean,
+    repeatMode: RepeatMode,
+    onToggleShuffle: () -> Unit,
+    onCycleRepeat: () -> Unit,
 ) {
+    val accent = MaterialTheme.colorScheme.primary
+    val muted = MaterialTheme.colorScheme.onSurfaceVariant
     Row(
         horizontalArrangement = Arrangement.spacedBy(8.dp),
         verticalAlignment = Alignment.CenterVertically,
     ) {
+        IconButton(onClick = onToggleShuffle) {
+            Icon(
+                imageVector = Lucide.Shuffle,
+                contentDescription = if (shuffleEnabled) "Shuffle on" else "Shuffle off",
+                tint = if (shuffleEnabled) accent else muted,
+            )
+        }
+        IconButton(onClick = onCycleRepeat) {
+            Icon(
+                imageVector = if (repeatMode == RepeatMode.ONE) Lucide.Repeat1 else Lucide.Repeat,
+                contentDescription = when (repeatMode) {
+                    RepeatMode.OFF -> "Repeat off"
+                    RepeatMode.ALL -> "Repeat all"
+                    RepeatMode.ONE -> "Repeat one"
+                },
+                tint = if (repeatMode == RepeatMode.OFF) muted else accent,
+            )
+        }
         ViewQueueButton(onClick = { navController.navigate(Queue) })
         TrackActionsButton(
             track = track,

android/app/src/main/java/com/fabledsword/minstrel/player/ui/PlayerViewModel.kt

@@ -31,4 +31,6 @@ class PlayerViewModel @Inject constructor(
     fun skipToNext() = controller.skipToNext()
     fun skipToPrevious() = controller.skipToPrevious()
     fun seekToIndex(index: Int) = controller.seekToIndex(index)
+    fun toggleShuffle() = controller.toggleShuffle()
+    fun cycleRepeat() = controller.cycleRepeat()
 }