接入桌面壳窗口标题同步路径

H5 主站按当前平台阶段同步 document.title

native_app 中通过 app.setTitle 请求 Tauri 窗口标题同步

补充标题同步测试和宿主壳能力文档

src/App.tsx

@@ -23,6 +23,10 @@ import {
   resolveSelectionStageFromPath,
 } from './routing/appPageRoutes';
 import type { RpgRuntimeAppIntent } from './RpgRuntimeApp';
+import {
+  resolveAppTitleForSelectionStage,
+  syncAppTitle,
+} from './services/appTitle';
 import type { CustomWorldProfile } from './types';
 
 const RpgRuntimeApp = lazy(async () => {
@@ -134,6 +138,14 @@ export default function App() {
       ? 'platform-theme--dark'
       : 'platform-theme--light';
 
+  useEffect(() => {
+    syncAppTitle(
+      isRuntimeActive
+        ? 'RPG 运行中 - 陶泥儿'
+        : resolveAppTitleForSelectionStage(selectionStage),
+    );
+  }, [isRuntimeActive, selectionStage]);
+
   if (isRuntimeActive) {
     return (
       <Suspense fallback={<RuntimeLoadingFallback />}>