fix ios transfer song bug

composeApp/src/commonMain/kotlin/com/zhushenwudi/lovelivemusicplayer/AppContainer.kt

@@ -280,6 +280,17 @@ object AppContainer {
         _libraryRevision.value++
     }
 
+    /** 清空曲库元数据并立即通知仍在组合中的首页列表重新查询。 */
+    fun clearSongData() {
+        if (!isInitialized) return
+        settings.dataVersion = ""
+        library.clearMusic()
+        library.clearAlbums()
+        library.clearArtists()
+        refreshCarPlayCatalog()
+        _libraryRevision.value++
+    }
+
     /** 清空喜欢、历史、歌单和播放队列，并通知首页刷新。 */
     fun clearUserData() {
         if (!isInitialized) return

composeApp/src/commonMain/kotlin/com/zhushenwudi/lovelivemusicplayer/ui/player/FullPlayerScreen.kt

@@ -536,7 +536,10 @@ private fun LandscapePlayerBody(
                 contentAlignment = Alignment.Center,
             ) {
                 BoxWithConstraints(Modifier.fillMaxSize()) {
-                    val side = maxWidth.coerceAtMost(maxHeight).coerceAtLeast(1.dp)
+                    val side = maxWidth
+                        .coerceAtMost(maxHeight)
+                        .coerceAtMost(300.dp)
+                        .coerceAtLeast(1.dp)
                     PlayerCoverArt(music = current, size = side)
                 }
             }

composeApp/src/commonMain/kotlin/com/zhushenwudi/lovelivemusicplayer/ui/screens/DrawerFeatureScreens.kt

@@ -71,7 +71,6 @@ import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
-import kotlinx.coroutines.withTimeoutOrNull
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.Json
 import org.jetbrains.compose.resources.ExperimentalResourceApi
@@ -334,10 +333,7 @@ fun SettingsScreen(
             onClearSongs = {
                 scope.launch {
                     loadingMsg = I18n.t("resetting")
-                    AppContainer.library.clearMusic()
-                    AppContainer.library.clearAlbums()
-                    AppContainer.library.clearArtists()
-                    settings.dataVersion = ""
+                    AppContainer.clearSongData()
                     loadingMsg = null
                     PlatformUi.showToast(I18n.t("clean_success"))
                 }
@@ -470,6 +466,7 @@ fun TransferScreen(onBack: () -> Unit, onOpenScan: () -> Unit) {
     var coverAnimationsIdle by remember { mutableStateOf(true) }
     var displayedSong by remember { mutableStateOf(state.current) }
     var displayedArtist by remember { mutableStateOf(state.artist) }
+    LaunchedEffect(Unit) { PlatformUi.requestLocalNetworkPermission() }
     KeepScreenOn()
     var wasCompleted by remember { mutableStateOf(state.completed) }
     LaunchedEffect(state.completed) {
@@ -594,9 +591,11 @@ private fun TransferCoverBlock(
     onIdleChange: (Boolean) -> Unit,
     onDisplayedSongChange: (String, String) -> Unit,
 ) {
-    val initialCover = remember { TransferCoverPage(coverKey, coverUrl, song, artist) }
+    val initialCover = remember {
+        TransferCoverPage(coverKey, coverUrl, song, artist, pageId = 0)
+    }
     val covers = remember { mutableStateListOf(initialCover) }
-    val readyCoverKeys = remember { mutableStateListOf<String>() }
+    val readyCoverPages = remember { mutableStateListOf<Int>() }
     val coverUpdates = remember { Channel<TransferCoverPage>(Channel.UNLIMITED) }
     val pagerState = rememberPagerState(pageCount = { covers.size })
     val latestOnIdleChange by rememberUpdatedState(onIdleChange)
@@ -615,20 +614,19 @@ private fun TransferCoverBlock(
                 val lastIndex = covers.lastIndex
                 if (covers[lastIndex].key == nextCover.key) {
                     // 同一封面只更新网络/本地地址，不改变 Pager 页码。
-                    if (covers[lastIndex] != nextCover) covers[lastIndex] = nextCover
+                    val updatedCover = nextCover.copy(pageId = covers[lastIndex].pageId)
+                    if (covers[lastIndex] != updatedCover) covers[lastIndex] = updatedCover
                     latestOnDisplayedSongChange(nextCover.song, nextCover.artist)
                     continue
                 }
 
-                covers.add(nextCover)
+                val targetCover = nextCover.copy(pageId = covers.size)
+                covers.add(targetCover)
                 val targetPage = covers.lastIndex
                 snapshotFlow { pagerState.pageCount }.first { it > targetPage }
-                // 右侧页图片准备好后再 post 到下一帧启动滚动，避免空 Painter 滑到中央闪白。
-                withTimeoutOrNull(2_000.milliseconds) {
-                    snapshotFlow {
-                        nextCover.key.isBlank() || nextCover.key in readyCoverKeys
-                    }.first { it }
-                }
+                // 每个新页面都等自己的图片首帧准备完成；不能复用相同封面 key 的旧完成状态，
+                // 也不能超时后强行切换，否则空 Painter 会在滑到中央时闪一下。
+                snapshotFlow { targetCover.pageId in readyCoverPages }.first { it }
                 delay(32.milliseconds)
                 runCatching { pagerState.animateScrollToPage(targetPage) }
                 latestOnDisplayedSongChange(nextCover.song, nextCover.artist)
@@ -652,8 +650,8 @@ private fun TransferCoverBlock(
         TransferCoverCircle(
             cover = cover,
             onReady = {
-                if (cover.key.isNotBlank() && cover.key !in readyCoverKeys) {
-                    readyCoverKeys.add(cover.key)
+                if (cover.pageId !in readyCoverPages) {
+                    readyCoverPages.add(cover.pageId)
                 }
             },
         )
@@ -665,6 +663,7 @@ private data class TransferCoverPage(
     val url: String,
     val song: String,
     val artist: String,
+    val pageId: Int = -1,
 )
 
 @OptIn(ExperimentalResourceApi::class)
@@ -776,6 +775,7 @@ fun DataSyncScreen(onBack: () -> Unit, onOpenScan: () -> Unit) {
     val dark = LocalDarkTheme.current
     val bg = if (dark) ColorMs.NightPrimary else ColorMs.LightPrimary
     val connected = state.connected
+    LaunchedEffect(Unit) { PlatformUi.requestLocalNetworkPermission() }
     KeepScreenOn()
     Scaffold(
         containerColor = bg,