address offline review: refresh, cursor, and cold-start fixes

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

@@ -88,7 +88,7 @@ class SourceRepository(
                 _quality.value = quality
                 val sourceChanged = config?.id != activeSourceId
                 activeSourceId = config?.id
-                if (!_offline.value && sourceChanged && config != null && config.useTokenAuth) {
+                if (sourceChanged && config != null && config.useTokenAuth && !prefs.offlineMode().first()) {
                     scope.launch { runCatching { config.toClient().check("ping") } }
                 }
             }

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

@@ -416,7 +416,6 @@ class PlaybackController(
             if (offline) {
                 queueRepository.setCursor(target)
                 loadWindow(target, autoplay = playing, startPositionMs = 0)
-                refresh(target)
                 return@withLock
             }
             if (snapshot.upNextSize > 0L || updated.upNextSize > 0L || snapshot.shuffled) {
@@ -509,7 +508,6 @@ class PlaybackController(
         if (offline) {
             queueRepository.setCursor(target)
             loadWindow(target, autoplay = player.playWhenReady, startPositionMs = player.currentPositionMs)
-            refresh(target)
             return@withLock
         }
         when {
@@ -564,9 +562,8 @@ class PlaybackController(
             val restoredId = queueRepository.itemAt(restored, target)?.song?.id
             windowJob?.cancel()
             if (offline) {
-                loadWindow(target, autoplay = playing, startPositionMs = 0)
                 queueRepository.setCursor(target)
-                refresh(target)
+                loadWindow(target, autoplay = playing, startPositionMs = 0)
                 return@withLock
             }
             val canMirror =
@@ -1054,6 +1051,10 @@ class PlaybackController(
                 val snapshot = snapshot ?: return@withLock
                 if (snapshot.size == 0L || player.isEnded) return@withLock
                 downloads.awaitLoaded()
+                if (offline) {
+                    reloadWindowLocked()
+                    return@withLock
+                }
                 val position = (currentPosition() ?: return@withLock).coerceIn(0, snapshot.size - 1)
                 val window = queueRepository.window(snapshot, position, QUEUE_WINDOW_RADIUS)
                 val uris = player.itemUris()

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

@@ -252,24 +252,9 @@ class QueueViewModel(
     fun undo() {
         viewModelScope.launch {
             playbackController.undo()
-            mutex.withLock { reload() }
+            mutex.withLock { reconcileLocked() }
         }
     }
-
-    private suspend fun reload() {
-        val snapshot = queueRepository.snapshot()
-        if (snapshot.size == 0L) {
-            rows.clear()
-            return
-        }
-        val start = (rows.minOfOrNull { it.position } ?: 0L).coerceIn(0, snapshot.size - 1)
-        val end = (rows.maxOfOrNull { it.position } ?: (start + QUEUE_CHUNK - 1)).coerceIn(start, snapshot.size - 1)
-        val loaded = queueRepository.range(snapshot, start, end).filter(::visible)
-        val reused = reusedIds()
-        val updated = loaded.map { rowFor(it, reused) }
-        rows.clear()
-        rows.addAll(updated)
-    }
 }
 
 @Composable