更新pubspec。修改启动屏幕的启动后台XML，并通过删除过时的文件和增强会话管理来重构记录功能。

lib/features/recording/model/model_recording.dart

@@ -1,4 +1,5 @@
 import 'package:recording_tool/features/recording/model/model_clipboard.dart';
+import 'package:recording_tool/features/recording/model/model_recording_session.dart';
 
 class RecordingModel {
   /// 剪切板内容
@@ -7,11 +8,17 @@ class RecordingModel {
   /// 剪切板是否包含有效的小程序录制信息
   final bool hasValidClipboardInfo;
 
+  /// 录制会话状态
+  final RecordingSessionState session;
+
   RecordingModel({
     required this.clipboardRecordingModel,
     this.hasValidClipboardInfo = false,
+    this.session = const RecordingSessionState(),
   });
 
+  bool get isRecording => session.isRecording;
+
   factory RecordingModel.fromJson(Map<String, dynamic> json) {
     return RecordingModel(
       clipboardRecordingModel: ClipboardRecordingModel.fromJson(
@@ -32,12 +39,14 @@ class RecordingModel {
   RecordingModel copyWith({
     ClipboardRecordingModel? clipboardRecordingModel,
     bool? hasValidClipboardInfo,
+    RecordingSessionState? session,
   }) {
     return RecordingModel(
       clipboardRecordingModel:
           clipboardRecordingModel ?? this.clipboardRecordingModel,
       hasValidClipboardInfo:
           hasValidClipboardInfo ?? this.hasValidClipboardInfo,
+      session: session ?? this.session,
     );
   }
 }

lib/features/recording/model/model_recording_session.dart

@@ -0,0 +1,82 @@
+import 'package:recording_tool/features/recording/recording_platform.dart';
+
+/// 录制会话状态（相机预览、权限、录制进度等）。
+class RecordingSessionState {
+  const RecordingSessionState({
+    this.status = const RecordingStatus(state: RecordingState.idle),
+    this.isTouchLocked = true,
+    this.isPreviewReady = false,
+    this.isStartingRecording = false,
+    this.hasDndAccess = false,
+    this.isBatteryOptimizedIgnored = true,
+    this.notificationsGranted = true,
+    this.isMicrophoneGranted = false,
+    this.lastOutputPath,
+    this.lastSavedDisplayName,
+    this.errorMessage,
+    this.permissionWarning,
+    this.gallerySaveFailed = false,
+  });
+
+  final RecordingStatus status;
+  final bool isTouchLocked;
+  final bool isPreviewReady;
+  final bool isStartingRecording;
+  final bool hasDndAccess;
+  final bool isBatteryOptimizedIgnored;
+  final bool notificationsGranted;
+  final bool isMicrophoneGranted;
+  final String? lastOutputPath;
+  final String? lastSavedDisplayName;
+  final String? errorMessage;
+  final String? permissionWarning;
+  final bool gallerySaveFailed;
+
+  bool get isRecording => status.isRecording;
+
+  String get elapsedLabel {
+    final totalSeconds = status.elapsedMillis ~/ 1000;
+    final minutes = (totalSeconds ~/ 60).toString().padLeft(2, '0');
+    final seconds = (totalSeconds % 60).toString().padLeft(2, '0');
+    return '$minutes:$seconds';
+  }
+
+  RecordingSessionState copyWith({
+    RecordingStatus? status,
+    bool? isTouchLocked,
+    bool? isPreviewReady,
+    bool? isStartingRecording,
+    bool? hasDndAccess,
+    bool? isBatteryOptimizedIgnored,
+    bool? notificationsGranted,
+    bool? isMicrophoneGranted,
+    String? lastOutputPath,
+    String? lastSavedDisplayName,
+    String? errorMessage,
+    String? permissionWarning,
+    bool? gallerySaveFailed,
+    bool clearPermissionWarning = false,
+    bool clearLastSaved = false,
+  }) {
+    return RecordingSessionState(
+      status: status ?? this.status,
+      isTouchLocked: isTouchLocked ?? this.isTouchLocked,
+      isPreviewReady: isPreviewReady ?? this.isPreviewReady,
+      isStartingRecording: isStartingRecording ?? this.isStartingRecording,
+      hasDndAccess: hasDndAccess ?? this.hasDndAccess,
+      isBatteryOptimizedIgnored:
+          isBatteryOptimizedIgnored ?? this.isBatteryOptimizedIgnored,
+      notificationsGranted: notificationsGranted ?? this.notificationsGranted,
+      isMicrophoneGranted: isMicrophoneGranted ?? this.isMicrophoneGranted,
+      lastOutputPath: lastOutputPath ?? this.lastOutputPath,
+      lastSavedDisplayName: clearLastSaved
+          ? null
+          : (lastSavedDisplayName ?? this.lastSavedDisplayName),
+      errorMessage: errorMessage,
+      permissionWarning: clearPermissionWarning
+          ? null
+          : (permissionWarning ?? this.permissionWarning),
+      gallerySaveFailed: gallerySaveFailed ?? this.gallerySaveFailed,
+    );
+  }
+}