聊天自定义背景实现

app/src/main/java/com/aiosman/ravenow/AppState.kt

@@ -46,6 +46,7 @@ object AppState {
     var enableGoogleLogin: Boolean = false
     var enableChat = false
     var agentCreatedSuccess by mutableStateOf(false)
+    var chatBackgroundUrl by mutableStateOf<String?>(null)
     suspend fun initWithAccount(scope: CoroutineScope, context: Context) {
         // 如果是游客模式，使用简化的初始化流程
         if (AppStore.isGuest) {