修复: 播放器series logo获取改为独立LaunchedEffect

- 将series logo获取拆分为独立的LaunchedEffect
- 先加载episode item，再异步获取series logo
- 避免在同一个LaunchedEffect中修改state导致重组问题

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

app/src/main/kotlin/com/example/myapplication/navigation/AppNavHost.kt

@@ -438,19 +438,23 @@ private fun PlayerDestination(
         } catch (_: Exception) {
             null
         }
-        // If episode has no logo, fetch the series item to get its logo
-        val currentSeriesId = seriesId ?: item?.seriesId
-        if (item?.logoImageTag == null && !currentSeriesId.isNullOrBlank() && server != null && server.apiKey.isNotBlank()) {
+        itemLoading = false
+    }
+
+    // Fetch series logo if episode has no logo
+    val currentSeriesId = seriesId ?: item?.seriesId
+    LaunchedEffect(server?.id, currentSeriesId, item?.id) {
+        if (item != null && item!!.logoImageTag == null && !currentSeriesId.isNullOrBlank() && server != null && server.apiKey.isNotBlank()) {
             try {
                 val seriesItem = EmbyRepository.getItem(server, currentSeriesId)
                 if (seriesItem?.logoImageTag != null) {
-                    item = item?.copy(
-                        imageTags = (item?.imageTags ?: emptyMap()) + mapOf("Logo" to seriesItem.logoImageTag!!)
+                    val updated = item!!.copy(
+                        imageTags = (item!!.imageTags ?: emptyMap()) + mapOf("Logo" to seriesItem.logoImageTag!!)
                     )
+                    item = updated
                 }
             } catch (_: Exception) { /* ignore */ }
         }
-        itemLoading = false
     }
 
     val effectiveSeriesId = seriesId ?: item?.seriesId