fix: 第三轮优化 — @Immutable覆盖、rememberImageRequest辅助函数、LazyRow keys

- EmbyApiModels: 8个嵌套类型添加@Immutable(EmbyUserData/EmbyPerson/EmbyNamedReference/EmbyMediaStream/EmbyItemCounts/EmbyResourceStats/EmbyChapter/EmbyMediaSource)
- LumaComponents: 新增rememberImageRequest()辅助函数避免ImageRequest.Builder重复分配
- HomeScreen/HomeLibraryAllScreen/FavoritesAllScreen/SearchScreen/SearchAllScreen/RecordsScreen/LibraryScreen: 17处ImageRequest.Builder替换为rememberImageRequest()
- MediaDetailScreen: episodes/genres/qualities/streams LazyRow添加stable key
- LibraryScreen: servers LazyVerticalGrid添加stable key

app/src/main/kotlin/com/example/myapplication/data/EmbyApiModels.kt

@@ -110,12 +110,14 @@ data class EmbyItem(
     }
 }
 
+@Immutable
 data class EmbyUserData(
     @SerializedName("PlaybackPositionTicks") val playbackPositionTicks: Long = 0L,
     @SerializedName("Played") val played: Boolean = false,
     @SerializedName("LastPlayedDate") val lastPlayedDate: String? = null,
 )
 
+@Immutable
 data class EmbyPerson(
     @SerializedName("Id") val id: String = "",
     @SerializedName("Name") val name: String = "",
@@ -124,12 +126,14 @@ data class EmbyPerson(
     @SerializedName("PrimaryImageTag") val primaryImageTag: String? = null,
 )
 
+@Immutable
 data class EmbyNamedReference(
     @SerializedName("Name") val name: String = "",
 )
 
 /* ---------- Detail ---------- */
 
+@Immutable
 data class EmbyMediaStream(
     @SerializedName("DisplayTitle") val displayTitle: String? = null,
     @SerializedName("DisplayLanguage") val displayLanguage: String? = null,
@@ -161,12 +165,14 @@ data class EmbyMediaStream(
     @SerializedName("IsForced") val isForced: Boolean = false,
 )
 
+@Immutable
 data class EmbyItemCounts(
     @SerializedName("MovieCount") val movieCount: Int = 0,
     @SerializedName("SeriesCount") val seriesCount: Int = 0,
     @SerializedName("EpisodeCount") val episodeCount: Int = 0,
 )
 
+@Immutable
 data class EmbyResourceStats(
     val withVersions: EmbyItemCounts = EmbyItemCounts(),
     val withoutVersions: EmbyItemCounts = EmbyItemCounts(),
@@ -181,6 +187,7 @@ data class EmbyResourceStats(
     )
 }
 
+@Immutable
 data class EmbyChapter(
     @SerializedName("StartPositionTicks") val startPositionTicks: Long = 0L,
     @SerializedName("Name") val name: String? = null,
@@ -196,6 +203,7 @@ data class EmbyPlaybackInfoResponse(
     @SerializedName("PlaySessionId") val playSessionId: String? = null,
 )
 
+@Immutable
 data class EmbyMediaSource(
     @SerializedName("Id") val id: String,
     @SerializedName("PlaySessionId") val playSessionId: String? = null,

app/src/main/kotlin/com/example/myapplication/screens/FavoritesAllScreen.kt

@@ -33,14 +33,14 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
-import androidx.compose.ui.platform.LocalContext
+
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import coil.compose.AsyncImage
-import coil.request.ImageRequest
+import com.example.myapplication.ui.design.rememberImageRequest
 import com.example.myapplication.R as Res
 import com.example.myapplication.data.EmbyServer
 import com.example.myapplication.data.FavoriteEntity
@@ -108,10 +108,7 @@ fun FavoritesAllScreen(
             ) {
                 if (server != null && server.iconUrl.isNotBlank()) {
                     AsyncImage(
-                        model = ImageRequest.Builder(LocalContext.current)
-                            .data(server.iconUrl)
-                            .crossfade(true)
-                            .build(),
+                        model = rememberImageRequest(server.iconUrl),
                         contentDescription = server.name,
                         contentScale = ContentScale.Crop,
                         modifier = Modifier
@@ -227,10 +224,7 @@ private fun FavoriteGridCard(
         ) {
             if (imageUrl != null) {
                 AsyncImage(
-                    model = ImageRequest.Builder(LocalContext.current)
-                        .data(imageUrl)
-                        .crossfade(true)
-                        .build(),
+                    model = rememberImageRequest(imageUrl),
                     contentDescription = title,
                     contentScale = ContentScale.Crop,
                     modifier = Modifier.fillMaxSize(),

app/src/main/kotlin/com/example/myapplication/screens/HomeLibraryAllScreen.kt

@@ -29,11 +29,11 @@ import androidx.compose.ui.geometry.Rect
 import androidx.compose.ui.layout.boundsInRoot
 import androidx.compose.ui.layout.onGloballyPositioned
 import androidx.compose.ui.layout.positionInRoot
-import androidx.compose.ui.platform.LocalContext
+
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import coil.request.ImageRequest
+import com.example.myapplication.ui.design.rememberImageRequest
 import com.example.myapplication.R as Res
 import com.example.myapplication.data.EmbyItem
 import com.example.myapplication.data.EmbyRepository
@@ -286,7 +286,7 @@ private fun HomeLibraryMediaCard(
 ) {
     LumaMediaCard(
         model = EmbyRepository.buildImageUrl(serverUrl, item)?.let {
-            ImageRequest.Builder(LocalContext.current).data(it).crossfade(true).build()
+            rememberImageRequest(it)
         },
         title = item.name,
         modifier = Modifier.fillMaxWidth(),

app/src/main/kotlin/com/example/myapplication/screens/HomeScreen.kt

@@ -69,6 +69,7 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.unit.TextUnit
 import coil.request.ImageRequest
+import com.example.myapplication.ui.design.rememberImageRequest
 import coil.imageLoader
 import com.example.myapplication.R as Res
 import com.example.myapplication.data.EmbyItem
@@ -343,7 +344,7 @@ private fun FeaturedItemBanner(
             Box(Modifier.fillMaxWidth().height(72.dp), contentAlignment = Alignment.Center) {
                 if (logoUrl != null) {
                     AsyncImage(
-                        model = ImageRequest.Builder(LocalContext.current).data(logoUrl).crossfade(true).build(),
+                        model = rememberImageRequest(logoUrl),
                         contentDescription = null,
                         contentScale = ContentScale.Fit,
                         placeholder = ColorPainter(Color.Transparent),

app/src/main/kotlin/com/example/myapplication/screens/LibraryScreen.kt

@@ -110,6 +110,7 @@ import com.example.myapplication.ui.design.LumaGlassLevel
 import com.example.myapplication.ui.design.LumaShapes
 import com.example.myapplication.ui.design.lumaGlass
 import coil.request.ImageRequest
+import com.example.myapplication.ui.design.rememberImageRequest
 import com.kyant.backdrop.Backdrop
 import com.kyant.backdrop.backdrops.layerBackdrop
 import kotlinx.coroutines.delay
@@ -381,7 +382,7 @@ fun LibraryScreen(
                 horizontalArrangement = Arrangement.spacedBy(12.dp),
             ) {
                 // Servers section
-                items(servers.size) { index ->
+                items(servers.size, key = { servers[it].id }) { index ->
                     val server = servers[index]
                     val tint = serverTints[index % serverTints.size]
                     if (isGrid) {
@@ -872,7 +873,7 @@ private fun IconLibraryManagerCard(library: IconLibrary, onClick: () -> Unit) {
                         contentAlignment = Alignment.Center,
                     ) {
                         LumaAsyncImage(
-                            model = ImageRequest.Builder(LocalContext.current).data(icon.url).crossfade(true).build(),
+                            model = rememberImageRequest(icon.url),
                             contentDescription = icon.name,
                             contentScale = ContentScale.Crop,
                             modifier = Modifier.fillMaxSize().padding(4.dp).clip(RoundedCornerShape(6.dp)),
@@ -1014,7 +1015,7 @@ private fun ManageIconLibraryDialog(
                                 contentAlignment = Alignment.Center,
                             ) {
                                 LumaAsyncImage(
-                                    model = ImageRequest.Builder(LocalContext.current).data(icon.url).crossfade(true).build(),
+                                    model = rememberImageRequest(icon.url),
                                     contentDescription = icon.name,
                                     contentScale = ContentScale.Crop,
                                     modifier = Modifier.fillMaxSize().padding(4.dp).clip(RoundedCornerShape(10.dp)),
@@ -1213,7 +1214,7 @@ private fun AddIconLibraryDialog(
                                     contentAlignment = Alignment.Center,
                                 ) {
                                     LumaAsyncImage(
-                                        model = ImageRequest.Builder(LocalContext.current).data(icon.url).crossfade(true).build(),
+                                        model = rememberImageRequest(icon.url),
                                         contentDescription = icon.name,
                                         modifier = Modifier.fillMaxSize().padding(4.dp).clip(RoundedCornerShape(10.dp)),
                                         contentScale = ContentScale.Crop,
@@ -1429,7 +1430,7 @@ private fun IconPickerDialog(
                                     contentAlignment = Alignment.Center,
                                 ) {
                                     LumaAsyncImage(
-                                        model = ImageRequest.Builder(LocalContext.current).data(icon.url).crossfade(true).build(),
+                                        model = rememberImageRequest(icon.url),
                                         contentDescription = icon.name,
                                         modifier = Modifier.fillMaxSize().padding(4.dp).clip(RoundedCornerShape(10.dp)),
                                         contentScale = ContentScale.Crop,

app/src/main/kotlin/com/example/myapplication/screens/MediaDetailScreen.kt

@@ -583,7 +583,7 @@ fun MediaDetailScreen(
                 if (detail.genres.isNotEmpty()) {
                     Spacer(Modifier.height(18.dp))
                     LazyRow(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
-                        items(detail.genres.size) { index ->
+                        items(detail.genres.size, key = { detail.genres[it] }) { index ->
                             val genre = detail.genres[index]
                             Box(
                                 Modifier
@@ -648,7 +648,7 @@ fun MediaDetailScreen(
                                 val episodeSpacing = 9.dp
                                 val episodeWidth = (maxWidth - episodeSpacing) / 2
                                 LazyRow(horizontalArrangement = Arrangement.spacedBy(episodeSpacing)) {
-                                    items(episodes.size) { index ->
+                                    items(episodes.size, key = { episodes[it].id }) { index ->
                                         val episode = episodes[index]
                                         Box(Modifier.width(episodeWidth)) {
                                             EpisodeCard(
@@ -1186,7 +1186,7 @@ private fun ResourceSection(
             if (qualities.isNotEmpty()) {
                 Spacer(Modifier.height(12.dp))
                 LazyRow(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
-                    items(qualities.size) { index ->
+                    items(qualities.size, key = { qualities[it] }) { index ->
                         Box(
                             Modifier
                                 .height(36.dp)
@@ -1562,7 +1562,7 @@ private fun MediaInformationSection(item: EmbyItem, loading: Boolean) {
             fontSize = 12.sp,
         )
         else -> LazyRow(horizontalArrangement = Arrangement.spacedBy(9.dp)) {
-            items(streams.size) { index ->
+            items(streams.size, key = { "${streams[it].type}_${streams[it].codec}_${streams[it].language}" }) { index ->
                 val stream = streams[index]
                 val typeIndex = streams.take(index + 1).count { it.type.equals(stream.type, ignoreCase = true) }
                 val typeCount = streams.count { it.type.equals(stream.type, ignoreCase = true) }
@@ -1774,7 +1774,7 @@ private fun EpisodeListDialog(
                 modifier = Modifier.fillMaxWidth().heightIn(max = 440.dp),
                 verticalArrangement = Arrangement.spacedBy(8.dp),
             ) {
-                items(episodes.size) { index ->
+                items(episodes.size, key = { episodes[it].id }) { index ->
                     val episode = episodes[index]
                     CompactEpisodeRow(
                         item = episode,

app/src/main/kotlin/com/example/myapplication/screens/RecordsScreen.kt

@@ -41,7 +41,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
-import androidx.compose.ui.platform.LocalContext
+
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
@@ -49,7 +49,7 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import coil.compose.AsyncImage
-import coil.request.ImageRequest
+import com.example.myapplication.ui.design.rememberImageRequest
 import com.example.myapplication.R as Res
 import com.example.myapplication.data.EmbyItem
 import com.example.myapplication.data.EmbyRepository
@@ -254,13 +254,7 @@ private fun ServerHeader(server: EmbyServer) {
             contentAlignment = Alignment.Center,
         ) {
             if (server.iconUrl.isNotBlank()) {
-                val ctx = LocalContext.current
-                val iconRequest = remember(server.iconUrl) {
-                    ImageRequest.Builder(ctx)
-                        .data(server.iconUrl)
-                        .crossfade(true)
-                        .build()
-                }
+                val iconRequest = rememberImageRequest(server.iconUrl)
                 AsyncImage(
                     model = iconRequest,
                     contentDescription = server.name,
@@ -396,10 +390,7 @@ private fun FavoritePosterCard(
         ) {
             if (imageUrl != null) {
                 AsyncImage(
-                    model = ImageRequest.Builder(LocalContext.current)
-                        .data(imageUrl)
-                        .crossfade(true)
-                        .build(),
+                    model = rememberImageRequest(imageUrl),
                     contentDescription = title,
                     contentScale = ContentScale.Crop,
                     modifier = Modifier.fillMaxSize(),
@@ -792,10 +783,7 @@ private fun CalendarEpisodeCard(episode: TmdbEpisodeCalendar, onClick: () -> Uni
         ) {
             if (posterUrl != null) {
                 AsyncImage(
-                    model = ImageRequest.Builder(LocalContext.current)
-                        .data(posterUrl)
-                        .crossfade(true)
-                        .build(),
+                    model = rememberImageRequest(posterUrl),
                     contentDescription = episode.seriesName,
                     contentScale = ContentScale.Crop,
                     modifier = Modifier.fillMaxSize(),
@@ -834,10 +822,7 @@ private fun CalendarEpisodeCard(episode: TmdbEpisodeCalendar, onClick: () -> Uni
                 if (episode.logoPath != null) {
                     Spacer(Modifier.width(6.dp))
                     AsyncImage(
-                        model = ImageRequest.Builder(LocalContext.current)
-                            .data(episode.logoPath)
-                            .crossfade(true)
-                            .build(),
+                        model = rememberImageRequest(episode.logoPath),
                         contentDescription = null,
                         contentScale = ContentScale.Fit,
                         modifier = Modifier
@@ -870,10 +855,7 @@ private fun CalendarEpisodeCard(episode: TmdbEpisodeCalendar, onClick: () -> Uni
                     Spacer(Modifier.width(4.dp))
                     if (episode.networkLogoPath != null) {
                         AsyncImage(
-                            model = ImageRequest.Builder(LocalContext.current)
-                                .data(episode.networkLogoPath)
-                                .crossfade(true)
-                                .build(),
+                            model = rememberImageRequest(episode.networkLogoPath),
                             contentDescription = episode.networkName,
                             contentScale = ContentScale.Fit,
                             modifier = Modifier

app/src/main/kotlin/com/example/myapplication/screens/SearchAllScreen.kt

@@ -32,14 +32,14 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
-import androidx.compose.ui.platform.LocalContext
+
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import coil.compose.AsyncImage
-import coil.request.ImageRequest
+import com.example.myapplication.ui.design.rememberImageRequest
 import com.example.myapplication.R as Res
 import com.example.myapplication.data.EmbyItem
 import com.example.myapplication.data.EmbyRepository
@@ -119,10 +119,7 @@ fun SearchAllScreen(
             ) {
                 if (server != null && server.iconUrl.isNotBlank()) {
                     AsyncImage(
-                        model = ImageRequest.Builder(LocalContext.current)
-                            .data(server.iconUrl)
-                            .crossfade(true)
-                            .build(),
+                        model = rememberImageRequest(server.iconUrl),
                         contentDescription = server.name,
                         contentScale = ContentScale.Crop,
                         modifier = Modifier
@@ -252,10 +249,7 @@ private fun SearchAllMediaCard(
         ) {
             if (imageUrl != null) {
                 AsyncImage(
-                    model = ImageRequest.Builder(LocalContext.current)
-                        .data(imageUrl)
-                        .crossfade(true)
-                        .build(),
+                    model = rememberImageRequest(imageUrl),
                     contentDescription = title,
                     contentScale = ContentScale.Crop,
                     modifier = Modifier.fillMaxSize(),

app/src/main/kotlin/com/example/myapplication/screens/SearchScreen.kt

@@ -50,7 +50,7 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import coil.compose.AsyncImage
-import coil.request.ImageRequest
+import com.example.myapplication.ui.design.rememberImageRequest
 import com.example.myapplication.R as Res
 import com.example.myapplication.data.EmbyItem
 import com.example.myapplication.data.EmbyRepository
@@ -551,10 +551,7 @@ private fun ServerSearchSection(
             ) {
                 if (server.iconUrl.isNotBlank()) {
                     AsyncImage(
-                        model = ImageRequest.Builder(LocalContext.current)
-                            .data(server.iconUrl)
-                            .crossfade(true)
-                            .build(),
+                        model = rememberImageRequest(server.iconUrl),
                         contentDescription = server.name,
                         contentScale = ContentScale.Crop,
                         modifier = Modifier
@@ -759,10 +756,7 @@ private fun SearchMediaPoster(
         ) {
             if (imageUrl != null) {
                 AsyncImage(
-                    model = ImageRequest.Builder(LocalContext.current)
-                        .data(imageUrl)
-                        .crossfade(true)
-                        .build(),
+                    model = rememberImageRequest(imageUrl),
                     contentDescription = title,
                     contentScale = ContentScale.Crop,
                     modifier = Modifier.fillMaxSize(),

app/src/main/kotlin/com/example/myapplication/ui/design/LumaComponents.kt

@@ -52,6 +52,7 @@ import androidx.compose.ui.graphics.Shape
 import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.graphics.painter.ColorPainter
 import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.layout.LayoutCoordinates
 import androidx.compose.ui.layout.onGloballyPositioned
 import androidx.compose.ui.layout.ContentScale
@@ -70,6 +71,15 @@ import coil.compose.AsyncImage
 import coil.request.ImageRequest
 import top.yukonga.miuix.kmp.basic.Text
 
+// P2: Reusable helper — creates a remembered ImageRequest to avoid allocation on every recomposition
+@Composable
+fun rememberImageRequest(modelData: Any?): ImageRequest? {
+    val context = LocalContext.current
+    return remember(modelData) {
+        modelData?.let { ImageRequest.Builder(context).data(it).crossfade(true).build() }
+    }
+}
+
 private enum class LumaImageState {
     Loading,
     Success,