回读宿主运行态能力

HostBridge 启动时通过真实 host.getRuntime 回读并缓存宿主能力

主 App 订阅宿主能力变化并在回读后刷新能力入口

补充宿主 runtime 回读测试和 App 能力刷新测试

更新 Expo/Tauri 壳方案、HostBridge 协议文档和共享决策记录

src/App.tsx

@@ -27,6 +27,10 @@ import {
   resolveAppTitleForSelectionStage,
   syncAppTitle,
 } from './services/appTitle';
+import {
+  refreshNativeAppHostRuntime,
+  subscribeHostRuntimeChange,
+} from './services/host-bridge/hostBridge';
 import type { CustomWorldProfile } from './types';
 
 const RpgRuntimeApp = lazy(async () => {
@@ -59,6 +63,7 @@ export default function App() {
   const runtimeIntentTokenRef = useRef(0);
   const [runtimeIntent, setRuntimeIntent] =
     useState<RpgRuntimeAppIntent | null>(null);
+  const [, setHostRuntimeRevision] = useState(0);
   const [isRuntimeActive, setIsRuntimeActive] = useState(() =>
     isRpgRuntimeRoute(window.location.pathname),
   );
@@ -76,6 +81,16 @@ export default function App() {
     pushAppHistoryPath(resolvePathForSelectionStage(stage));
   }, []);
 
+  useEffect(() => {
+    const unsubscribe = subscribeHostRuntimeChange(() => {
+      setHostRuntimeRevision((revision) => revision + 1);
+    });
+
+    void refreshNativeAppHostRuntime();
+
+    return unsubscribe;
+  }, []);
+
   useEffect(() => {
     const syncStageFromHistory = () => {
       if (isRpgRuntimeRoute(window.location.pathname)) {