fix: 首页轮播图下拉刷新时随机排序，增加获取数量到20

- 首次加载保持API排序（一致性），下拉刷新后shuffle增加多样性
- getLatestItems limit 10→20，让更多内容参与轮播选择

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

@@ -850,7 +850,13 @@ fun HomeScreen(
     val homeBackdrop = rememberLumaLayerBackdrop()
     val heroHeight = (LocalConfiguration.current.screenHeightDp.dp * 0.5f)
 
-    val heroItems = remember(latestItems) { latestItems.take(8) }
+    val heroItems = remember(latestItems, reloadToken) {
+        if (reloadToken == 0) {
+            latestItems.take(8)  // First load: keep API order for consistency
+        } else {
+            latestItems.shuffled().take(8)  // Pull-to-refresh: shuffle for variety
+        }
+    }
     val heroPagerState = rememberPagerState(pageCount = { heroItems.size })
     val homeListState = rememberLazyListState()
     val activeHeroItem = heroItems.getOrNull(heroPagerState.currentPage)
@@ -877,7 +883,7 @@ fun HomeScreen(
         if (inPlaceRefresh) refreshing = true else loading = true
         try {
             val libsDeferred = async { EmbyRepository.getLibraries(server) }
-            val latestDeferred = async { EmbyRepository.getLatestItems(server, limit = 10) }
+            val latestDeferred = async { EmbyRepository.getLatestItems(server, limit = 20) }
             val resumeDeferred = async { EmbyRepository.getResumeItems(server, limit = 10) }
             val statsDeferred = async { EmbyRepository.getResourceStats(server) }