feat: 添加媒体权限请求桥接脚本，优化 WebView 媒体权限处理逻辑

android/app/src/main/AndroidManifest.xml

@@ -16,6 +16,7 @@
     <!-- 相机和麦克风权限 -->
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
     
     <!-- 位置权限（如果需要） -->
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

lib/config/app_config.dart

@@ -41,7 +41,8 @@ class AppConfig {
   }) {
     final uri = Uri.parse(url);
     final queryParameters = Map<String, String>.from(uri.queryParameters)
-      ..['flutter_shell'] = '1';
+      ..['flutter_shell'] = '1'
+      ..['shell_cache_bust'] = DateTime.now().millisecondsSinceEpoch.toString();
 
     final trimmedName = (appName ?? AppConfig.appName).trim();
     if (trimmedName.isNotEmpty) {

lib/main.dart

@@ -17,6 +17,100 @@ const _shellSubText = Color(0xFF8E9AB0);
 const _resumeCoverDuration = Duration(milliseconds: 700);
 const _shellBrandingChannel =
     MethodChannel('io.openim.flutter.im_webview_app/shell_branding');
+const _shellMediaPermissionBridgeScript = r'''
+(() => {
+  if (window.__openimShellMediaBridgeInstalled) {
+    return;
+  }
+
+  const channel = window.OpenIMFlutterShell;
+  const mediaDevices = navigator.mediaDevices;
+  if (!channel || typeof channel.postMessage !== 'function') {
+    return;
+  }
+  if (!mediaDevices || typeof mediaDevices.getUserMedia !== 'function') {
+    return;
+  }
+
+  const originalGetUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);
+  const resultEventName = 'openim-shell-media-permission-result';
+
+  const createRequestId = () => {
+    if (window.crypto && typeof window.crypto.randomUUID === 'function') {
+      return window.crypto.randomUUID();
+    }
+    return `${Date.now()}-${Math.random().toString(36).slice(2)}`;
+  };
+
+  const createPermissionError = () => {
+    try {
+      return new DOMException('Permission denied', 'NotAllowedError');
+    } catch (_) {
+      const error = new Error('Permission denied');
+      error.name = 'NotAllowedError';
+      return error;
+    }
+  };
+
+  const requestNativePermissions = (constraints) =>
+    new Promise((resolve) => {
+      const requestId = createRequestId();
+      let timer;
+
+      const cleanup = () => {
+        if (timer) {
+          window.clearTimeout(timer);
+        }
+        window.removeEventListener(resultEventName, listener);
+      };
+
+      const listener = (event) => {
+        const detail = event.detail;
+        if (!detail || detail.requestId !== requestId) {
+          return;
+        }
+        cleanup();
+        resolve(detail);
+      };
+
+      timer = window.setTimeout(() => {
+        cleanup();
+        resolve(undefined);
+      }, 30000);
+
+      window.addEventListener(resultEventName, listener);
+      channel.postMessage(
+        JSON.stringify({
+          type: 'requestMediaPermissions',
+          requestId,
+          audio: Boolean(constraints && constraints.audio),
+          video: Boolean(constraints && constraints.video),
+        }),
+      );
+    });
+
+  const wrappedGetUserMedia = async (constraints) => {
+    const result = await requestNativePermissions(constraints || {});
+    if (result && result.granted) {
+      return originalGetUserMedia(constraints);
+    }
+    throw createPermissionError();
+  };
+
+  try {
+    Object.defineProperty(mediaDevices, 'getUserMedia', {
+      configurable: true,
+      writable: true,
+      value: wrappedGetUserMedia,
+    });
+  } catch (_) {
+    mediaDevices.getUserMedia = wrappedGetUserMedia;
+  }
+
+  window.__openimShellMediaBridgeInstalled = true;
+  window.dispatchEvent(new CustomEvent('openim-shell-media-bridge-ready'));
+})();
+''';
 const _stopWebMediaScript = r'''
 (() => {
   try {
@@ -192,6 +286,7 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
           },
           onPageFinished: (_) {
             unawaited(_syncShellBranding());
+            unawaited(_injectShellMediaPermissionBridge());
             if (mounted) {
               setState(() {
                 _progress = 100;
@@ -275,12 +370,10 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
       permissions.add(Permission.camera);
     }
 
-    final statuses = permissions.isEmpty
-        ? <PermissionStatus>[]
-        : await Future.wait(
-            permissions.map((permission) => permission.request()));
+    final statusesByPermission = await _requestPermissions(permissions);
+    final statuses = statusesByPermission.values;
     final granted = statuses.every(
-      (status) => status.isGranted || status.isLimited,
+      _isPermissionAllowed,
     );
     final permanentlyDenied =
         statuses.any((status) => status.isPermanentlyDenied);
@@ -337,6 +430,10 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
     return _runJavaScriptSafely(script);
   }
 
+  Future<void> _injectShellMediaPermissionBridge() {
+    return _runJavaScriptSafely(_shellMediaPermissionBridgeScript);
+  }
+
   Future<void> _stopWebMedia() {
     return _runJavaScriptSafely(_stopWebMediaScript);
   }
@@ -368,7 +465,7 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
   Future<void> _handleWebViewPermissionRequest(
     WebViewPermissionRequest request,
   ) async {
-    final permissions = <Permission>[];
+    final permissions = <Permission>{};
     if (request.types.contains(WebViewPermissionResourceType.camera)) {
       permissions.add(Permission.camera);
     }
@@ -376,9 +473,17 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
       permissions.add(Permission.microphone);
     }
 
-    final allowed = permissions.isEmpty ||
-        await Future.wait(permissions.map(_requestPermission))
-            .then((results) => results.every((allowed) => allowed));
+    debugPrint(
+      '[H5Shell] WebView media permission request: '
+      '${request.types.map((type) => type.name).join(', ')}',
+    );
+
+    final statusesByPermission = await _requestPermissions(permissions);
+    final allowed = statusesByPermission.values.every(_isPermissionAllowed);
+    debugPrint(
+      '[H5Shell] WebView media permission result: '
+      '${statusesByPermission.map((permission, status) => MapEntry(permission.toString(), status.toString()))}',
+    );
 
     if (allowed) {
       await request.grant();
@@ -387,11 +492,43 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
     }
   }
 
-  Future<bool> _requestPermission(Permission permission) async {
-    final status = await permission.request();
+  bool _isPermissionAllowed(PermissionStatus status) {
     return status.isGranted || status.isLimited;
   }
 
+  Future<Map<Permission, PermissionStatus>> _requestPermissions(
+    Set<Permission> permissions,
+  ) async {
+    if (permissions.isEmpty) {
+      return const {};
+    }
+
+    final pending = <Permission>[];
+    final statuses = <Permission, PermissionStatus>{};
+
+    for (final permission in permissions) {
+      final status = await permission.status;
+      if (_isPermissionAllowed(status) ||
+          status.isPermanentlyDenied ||
+          status.isRestricted) {
+        statuses[permission] = status;
+      } else {
+        pending.add(permission);
+      }
+    }
+
+    if (pending.isNotEmpty) {
+      statuses.addAll(await pending.request());
+    }
+
+    return statuses;
+  }
+
+  Future<bool> _requestPermission(Permission permission) async {
+    final statuses = await _requestPermissions({permission});
+    return statuses.values.every(_isPermissionAllowed);
+  }
+
   Future<void> _handleBackNavigation() async {
     await _stopWebMedia();
     if (await _controller.canGoBack()) {