删除未使用的相机和记录类来重构记录功能；更新pubspec中的依赖项。Yaml为本地插件路径；简化MainActivity和相关类，以提高性能和可维护性。

lib/features/recording/view-model/view_model_recording.dart

@@ -1,18 +1,13 @@
 import 'dart:async';
-import 'dart:convert';
 import 'dart:io';
 
-import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:permission_handler/permission_handler.dart';
-import 'package:recording_tool/core/logging/app_logger.dart';
 import 'package:recording_tool/core/permission/permission_service.dart';
-import 'package:recording_tool/core/platform/app_platform_info.dart';
-import 'package:recording_tool/features/recording/model/model_clipboard.dart';
 import 'package:recording_tool/features/recording/model/model_recording.dart';
+import 'package:recording_tool/features/recording/model/model_recording_context.dart';
 import 'package:recording_tool/features/recording/model/model_recording_session.dart';
 import 'package:recording_tool/features/recording/platform/recording_platform.dart';
-import 'package:recording_tool/features/recording/utils/recording_display_name.dart';
 
 /// 录制页状态 Provider。
 final recordingViewModelProvider =
@@ -20,35 +15,6 @@ final recordingViewModelProvider =
       RecordingViewModel.new,
     );
 
-/// 剪切板读取结果，供 UI 决定是否提示用户。
-enum ClipboardReadResult {
-  /// 剪切板为空，不提示
-  empty,
-
-  /// 解析成功
-  success,
-
-  /// 有内容但格式不符合小程序录制信息
-  invalid,
-}
-
-List<Permission> recordingFileSavePermissionsForHost({
-  required bool isIOS,
-  required bool isAndroid,
-  int? androidSdkInt,
-}) {
-  if (isIOS) {
-    return const [];
-  }
-  if (isAndroid) {
-    if (androidSdkInt != null && androidSdkInt <= 28) {
-      return [Permission.storage];
-    }
-    return const [];
-  }
-  return const [];
-}
-
 /// 开始录制所需的相机/麦克风权限检测结果。
 class RecordingRequiredPermissions {
   const RecordingRequiredPermissions({
@@ -62,20 +28,16 @@ class RecordingRequiredPermissions {
   bool get allGranted => cameraGranted && microphoneGranted;
 }
 
-/// 录制页 ViewModel：剪贴板、权限、相机预览与录制流程。
+/// 录制页 ViewModel：赛事上下文、权限、推流与页面状态。
 class RecordingViewModel extends Notifier<RecordingModel> {
-  static final _defaultClipboard = ClipboardRecordingModel(
-    title: '',
-    address: '',
-  );
-
-  StreamSubscription<RecordingStatus>? _statusSubscription;
+  Timer? _elapsedTimer;
+  DateTime? _recordingStartedAt;
 
   /// 初始化状态并注册销毁回调。
   @override
   RecordingModel build() {
     ref.onDispose(_dispose);
-    return RecordingModel(clipboardRecordingModel: _defaultClipboard);
+    return RecordingModel(recordingContext: const RecordingContext.empty());
   }
 
   /// 局部更新 session 子状态。
@@ -85,76 +47,22 @@ class RecordingViewModel extends Notifier<RecordingModel> {
     state = state.copyWith(session: update(state.session));
   }
 
-  /// 读取并解析剪贴板中的小程序录制信息。
-  Future<ClipboardReadResult> getClipboardContent() async {
-    try {
-      final clipboardData = await Clipboard.getData(Clipboard.kTextPlain);
-      final text = clipboardData?.text;
-      AppLogger.debug('读取剪切板内容：$text');
-
-      if (text == null || text.trim().isEmpty) {
-        AppLogger.info('剪切板内容为空，跳过录制信息解析');
-        _resetClipboardInfo();
-        return ClipboardReadResult.empty;
-      }
-
-      final decoded = jsonDecode(text.trim());
-      if (decoded is! Map<String, dynamic>) {
-        AppLogger.warning('剪切板内容不是 JSON 对象，跳过录制信息解析');
-        _resetClipboardInfo();
-        return ClipboardReadResult.invalid;
-      }
-
-      final clipboardRecordingModel = ClipboardRecordingModel.fromJson(decoded);
-      if (clipboardRecordingModel.title.trim().isEmpty) {
-        AppLogger.warning('剪切板录制信息缺少有效 title');
-        _resetClipboardInfo();
-        return ClipboardReadResult.invalid;
-      }
-
-      state = state.copyWith(
-        clipboardRecordingModel: clipboardRecordingModel,
-        hasValidClipboardInfo: true,
-      );
-      AppLogger.info('剪切板录制信息解析成功：${clipboardRecordingModel.toJson()}');
-      return ClipboardReadResult.success;
-    } on FormatException catch (error) {
-      AppLogger.warning('剪切板录制信息格式错误：$error');
-      _resetClipboardInfo();
-      return ClipboardReadResult.invalid;
-    } catch (error, stackTrace) {
-      AppLogger.debug('读取剪切板录制信息失败', error: error, stackTrace: stackTrace);
-      _resetClipboardInfo();
-      return ClipboardReadResult.invalid;
-    }
+  /// 设置当前录制页上下文。
+  void setRecordingContext(RecordingContext recordingContext) {
+    state = state.copyWith(recordingContext: recordingContext);
   }
 
-  /// 清空剪贴板赛事信息（供 UI 调用）。
-  void resetClipboardInfo() {
-    _resetClipboardInfo();
-  }
-
-  /// 重置剪贴板赛事信息为默认空值。
-  void _resetClipboardInfo() {
-    state = state.copyWith(
-      clipboardRecordingModel: _defaultClipboard,
-      hasValidClipboardInfo: false,
-    );
-  }
-
-  /// 申请权限、检查系统设置并初始化相机预览。
+  /// 申请权限并检查系统设置。
   Future<void> prepareSession() async {
     if (!RecordingPlatform.isSupported) {
       _updateSession((s) => s.copyWith(errorMessage: '当前设备不支持录制'));
       return;
     }
 
-    final fileSavePermissions = await _fileSavePermissions();
     final permissions = await PermissionService.requestMissing([
       Permission.camera,
       Permission.microphone,
       if (Platform.isAndroid) Permission.notification,
-      ...fileSavePermissions,
     ]);
 
     final cameraGranted = permissions[Permission.camera]?.isGranted ?? false;
@@ -176,10 +84,6 @@ class RecordingViewModel extends Notifier<RecordingModel> {
     if (!microphoneGranted) {
       warnings.add('未授予麦克风权限，当前将以静音模式录制');
     }
-    if (!_isFileSavePermissionGranted(permissions, fileSavePermissions)) {
-      warnings.add('未授予文件保存权限，录制结束后可能无法保存到文件夹');
-    }
-
     final hasDnd = await RecordingPlatform.hasNotificationPolicyAccess();
     final batteryIgnored =
         await RecordingPlatform.isIgnoringBatteryOptimizations();
@@ -196,106 +100,13 @@ class RecordingViewModel extends Notifier<RecordingModel> {
       ),
     );
 
-    await _listenStatus();
-    try {
-      final status = await _initializePreviewWithRetry();
-      await _refreshZoomCapabilities();
-      _updateSession(
-        (s) => s.copyWith(
-          status: status,
-          isPreviewReady: status.state == RecordingState.previewing,
-          errorMessage: status.state == RecordingState.previewing
-              ? null
-              : (status.message ?? '相机预览初始化失败'),
-        ),
-      );
-    } on PlatformException catch (error) {
-      _updateSession(
-        (s) => s.copyWith(
-          isPreviewReady: false,
-          errorMessage: error.message ?? '相机预览初始化失败',
-        ),
-      );
-    }
+    _updateSession((s) => s.copyWith(errorMessage: null));
   }
 
-  /// 初始化相机预览，PlatformView 未就绪时自动重试。
-  Future<RecordingStatus> _initializePreviewWithRetry() async {
-    const maxAttempts = 8;
-    for (var attempt = 0; attempt < maxAttempts; attempt++) {
-      try {
-        return await RecordingPlatform.initializePreview();
-      } on PlatformException catch (error) {
-        final shouldRetry =
-            error.code == 'NO_PREVIEW' && attempt < maxAttempts - 1;
-        if (!shouldRetry) {
-          rethrow;
-        }
-        await Future<void>.delayed(Duration(milliseconds: 150 * (attempt + 1)));
-      }
-    }
-    throw StateError('initializePreview retry exhausted');
-  }
-
-  /// 停止录制后重新绑定相机预览，并显示加载遮罩。
-  Future<void> restorePreview() async {
-    if (!RecordingPlatform.isSupported) return;
-
+  void setPreviewReady({required bool ready, String? errorMessage}) {
     _updateSession(
-      (s) => s.copyWith(isPreviewReady: false, errorMessage: null),
+      (s) => s.copyWith(isPreviewReady: ready, errorMessage: errorMessage),
     );
-    try {
-      final status = await _initializePreviewWithRetry();
-      await _refreshZoomCapabilities();
-      _updateSession(
-        (s) => s.copyWith(
-          status: status,
-          isPreviewReady: status.state == RecordingState.previewing,
-          errorMessage: status.state == RecordingState.previewing
-              ? null
-              : (status.message ?? '相机预览初始化失败'),
-        ),
-      );
-    } on PlatformException catch (error) {
-      _updateSession(
-        (s) => s.copyWith(
-          isPreviewReady: false,
-          errorMessage: error.message ?? '相机预览初始化失败',
-        ),
-      );
-    }
-  }
-
-  /// 当前平台所需的视频文件保存权限列表。
-  Future<List<Permission>> _fileSavePermissions() async {
-    int? androidSdkInt;
-    if (Platform.isAndroid) {
-      try {
-        androidSdkInt = int.tryParse(
-          (await AppPlatformInfo.deviceInfo()).values['sdkInt'] ?? '',
-        );
-      } on PlatformException {
-        androidSdkInt = null;
-      }
-    }
-    return recordingFileSavePermissionsForHost(
-      isIOS: Platform.isIOS,
-      isAndroid: Platform.isAndroid,
-      androidSdkInt: androidSdkInt,
-    );
-  }
-
-  /// 判断文件保存相关权限是否至少有一项已授予。
-  bool _isFileSavePermissionGranted(
-    Map<Permission, PermissionStatus> permissions,
-    List<Permission> fileSavePermissions,
-  ) {
-    for (final permission in fileSavePermissions) {
-      if (permissions[permission]?.isGranted ?? false) {
-        return true;
-      }
-    }
-    return fileSavePermissions.isEmpty;
   }
 
   /// 检测并尝试申请相机、麦克风权限，同步更新 session 中的 isMicrophoneGranted。
@@ -315,8 +126,7 @@ class RecordingViewModel extends Notifier<RecordingModel> {
 
     if (cameraGranted && !state.session.isPreviewReady) {
       _updateSession((s) => s.copyWith(errorMessage: null));
-      await _listenStatus();
-      await restorePreview();
+      _updateSession((s) => s.copyWith(isPreviewReady: true));
     }
 
     return RecordingRequiredPermissions(
@@ -329,130 +139,115 @@ class RecordingViewModel extends Notifier<RecordingModel> {
     return status?.isGranted == true || status?.isLimited == true;
   }
 
-  /// 读取相机支持的倍距范围并同步当前倍距。
-  Future<void> _refreshZoomCapabilities() async {
-    try {
-      final zoom = await RecordingPlatform.getZoomCapabilities();
-      _updateSession(
-        (s) => s.copyWith(
-          zoomRatio: zoom.zoomRatio,
-          minZoomRatio: zoom.minZoomRatio,
-          maxZoomRatio: zoom.maxZoomRatio,
-          errorMessage: null,
-        ),
-      );
-    } on PlatformException catch (error) {
-      AppLogger.debug('读取相机倍距能力失败', error: error);
-    }
-  }
-
-  /// 设置相机倍距，原生层会返回设备实际应用后的倍距范围与当前值。
-  Future<void> setZoomRatio(double ratio) async {
-    final session = state.session;
-    if (session.isSwitchingLens) {
-      return;
-    }
-    final clamped = ratio
-        .clamp(session.minZoomRatio, session.maxZoomRatio)
-        .toDouble();
-
-    _updateSession((s) => s.copyWith(isSwitchingLens: true));
-    try {
-      final zoom = await RecordingPlatform.setZoomRatio(clamped);
-      _updateSession(
-        (s) => s.copyWith(
-          zoomRatio: zoom.zoomRatio,
-          minZoomRatio: zoom.minZoomRatio,
-          maxZoomRatio: zoom.maxZoomRatio,
-          errorMessage: null,
-        ),
-      );
-    } on PlatformException catch (error) {
-      final message = error.code == 'ZOOM_FAILED'
-          ? '切换镜头失败，请重试'
-          : (error.message ?? '相机倍距设置失败');
-      _updateSession((s) => s.copyWith(errorMessage: message));
-    } finally {
-      _updateSession(
-        (s) => s.copyWith(isSwitchingLens: false, errorMessage: s.errorMessage),
-      );
-    }
-  }
-
-  /// 开始录制，可选开启勿扰模式。
-  Future<void> startRecording({bool enableDoNotDisturb = true}) async {
-    final session = state.session;
-    if (session.isRecording ||
-        session.isStartingRecording ||
-        session.isSwitchingLens) {
-      return;
-    }
-    if (!session.isPreviewReady) {
-      _updateSession((s) => s.copyWith(errorMessage: '相机预览未就绪，请稍后重试'));
-      return;
-    }
-
-    final displayName = recordingFileNameForPlatform(
-      state.clipboardRecordingModel.filename,
-    );
-
+  void updateZoomCapabilities({
+    required double zoomRatio,
+    required double minZoomRatio,
+    required double maxZoomRatio,
+  }) {
     _updateSession(
-      (s) => s.copyWith(isStartingRecording: true, errorMessage: null),
+      (s) => s.copyWith(
+        zoomRatio: zoomRatio,
+        minZoomRatio: minZoomRatio,
+        maxZoomRatio: maxZoomRatio,
+        errorMessage: null,
+      ),
     );
-    try {
-      final result = await RecordingPlatform.startRecording(
-        enableDoNotDisturb: enableDoNotDisturb && state.session.hasDndAccess,
-        displayName: displayName,
-      );
-      _updateSession(
-        (s) => s.copyWith(
-          status: result.status,
-          lastOutputPath: result.outputPath,
-          isTouchLocked: true,
-          errorMessage: null,
-          fileSaveFailed: false,
-          segmentOutputPaths: const [],
-          clearLastSaved: true,
-        ),
-      );
-    } on PlatformException catch (error) {
-      _updateSession(
-        (s) => s.copyWith(errorMessage: error.message ?? '开始录制失败'),
-      );
-    } finally {
-      _updateSession((s) => s.copyWith(isStartingRecording: false));
-    }
   }
 
-  /// 停止录制、保存到文件夹，并恢复相机预览。
-  Future<void> stopRecording() async {
-    if (!state.session.isRecording || state.session.isSwitchingLens) return;
+  void markLensSwitching(bool switching) {
+    _updateSession((s) => s.copyWith(isSwitchingLens: switching));
+  }
 
-    try {
-      final result = await RecordingPlatform.stopRecording();
-      final fileFailed = !result.fileSaved;
-      final savedName = recordingFileNameForPlatform(
-        state.clipboardRecordingModel.filename,
-      );
+  void setZoomRatioValue(double ratio) {
+    _updateSession((s) => s.copyWith(zoomRatio: ratio, errorMessage: null));
+  }
+
+  void setError(String message) {
+    _updateSession((s) => s.copyWith(errorMessage: message));
+  }
+
+  void markStartingRecording() {
+    _updateSession(
+      (s) => s.copyWith(
+        isStartingRecording: true,
+        errorMessage: null,
+        clearStreamResult: true,
+      ),
+    );
+  }
+
+  Future<void> markRecordingStarted(String streamUrl) async {
+    if (state.session.hasDndAccess) {
+      await RecordingPlatform.enableDoNotDisturb();
+    }
+    _recordingStartedAt = DateTime.now();
+    _elapsedTimer?.cancel();
+    _elapsedTimer = Timer.periodic(const Duration(seconds: 1), (_) {
+      final startedAt = _recordingStartedAt;
+      if (startedAt == null) return;
+      final elapsed = DateTime.now().difference(startedAt).inMilliseconds;
       _updateSession(
         (s) => s.copyWith(
-          status: result.status,
-          lastOutputPath: result.outputPath ?? s.lastOutputPath,
-          lastSavedDisplayName: fileFailed ? null : savedName,
-          errorMessage: fileFailed
-              ? (result.fileErrorMessage ?? '保存到文件夹失败，请检查文件保存权限')
-              : null,
-          fileSaveFailed: fileFailed,
-          segmentOutputPaths: result.segmentOutputPaths,
+          status: RecordingStatus(
+            state: RecordingState.recording,
+            streamUrl: streamUrl,
+            elapsedMillis: elapsed,
+          ),
         ),
       );
-    } on PlatformException catch (error) {
-      _updateSession(
-        (s) => s.copyWith(errorMessage: error.message ?? '停止录制失败'),
-      );
-    } finally {
-      await restorePreview();
-    }
+    });
+    _updateSession(
+      (s) => s.copyWith(
+        status: RecordingStatus(
+          state: RecordingState.recording,
+          streamUrl: streamUrl,
+        ),
+        lastStreamUrl: streamUrl,
+        isStartingRecording: false,
+        isTouchLocked: true,
+        errorMessage: null,
+        streamFailed: false,
+        clearStreamResult: true,
+      ),
+    );
+  }
+
+  void markRecordingStartFailed(String message) {
+    _recordingStartedAt = null;
+    _elapsedTimer?.cancel();
+    _elapsedTimer = null;
+    _updateSession(
+      (s) => s.copyWith(
+        status: const RecordingStatus(state: RecordingState.previewing),
+        isStartingRecording: false,
+        errorMessage: message,
+        streamFailed: true,
+      ),
+    );
+  }
+
+  Future<void> markRecordingStopped({String? errorMessage}) async {
+    final lastStreamUrl = state.session.lastStreamUrl;
+    final elapsed = _recordingStartedAt == null
+        ? state.session.status.elapsedMillis
+        : DateTime.now().difference(_recordingStartedAt!).inMilliseconds;
+    _recordingStartedAt = null;
+    _elapsedTimer?.cancel();
+    _elapsedTimer = null;
+    await RecordingPlatform.disableDoNotDisturb();
+    _updateSession(
+      (s) => s.copyWith(
+        status: RecordingStatus(
+          state: RecordingState.previewing,
+          streamUrl: lastStreamUrl,
+          elapsedMillis: elapsed,
+        ),
+        isStartingRecording: false,
+        errorMessage: errorMessage,
+        streamFinished: errorMessage == null,
+        streamFailed: errorMessage != null,
+      ),
+    );
   }
 
   /// 切换录制中触屏锁定状态。
@@ -460,9 +255,9 @@ class RecordingViewModel extends Notifier<RecordingModel> {
     _updateSession((s) => s.copyWith(isTouchLocked: locked));
   }
 
-  /// 清除上次保存成功的录制结果标记。
+  /// 清除上次推流完成结果标记。
   void clearSavedRecordingResult() {
-    _updateSession((s) => s.copyWith(clearLastSaved: true));
+    _updateSession((s) => s.copyWith(clearStreamResult: true));
   }
 
   /// 跳转系统勿扰/通知策略设置页。
@@ -489,22 +284,14 @@ class RecordingViewModel extends Notifier<RecordingModel> {
   Future<void> teardown() async {
     await RecordingPlatform.setImmersiveMode(enabled: false);
     await RecordingPlatform.disableDoNotDisturb();
-    await RecordingPlatform.disposePreview();
-    await _statusSubscription?.cancel();
-    _statusSubscription = null;
+    _recordingStartedAt = null;
+    _elapsedTimer?.cancel();
+    _elapsedTimer = null;
     state = state.copyWith(session: const RecordingSessionState());
   }
 
-  /// 订阅原生层录制状态流并同步到 session。
-  Future<void> _listenStatus() async {
-    await _statusSubscription?.cancel();
-    _statusSubscription = RecordingPlatform.statusStream().listen((status) {
-      _updateSession((s) => s.copyWith(status: status));
-    });
-  }
-
   /// Provider 销毁时取消状态流订阅。
   Future<void> _dispose() async {
-    await _statusSubscription?.cancel();
+    _elapsedTimer?.cancel();
   }
 }