用户开始录制，拒绝录音录像权限，增加弹窗引导用户前往系统页设置

lib/features/recording/pages/page_record.dart

@@ -3,6 +3,7 @@ import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:permission_handler/permission_handler.dart';
 import 'package:recording_tool/core/platform/app_platform_info.dart';
 import 'package:recording_tool/core/platform/device_health_checker.dart';
 import 'package:recording_tool/features/dialog/dialog-record.dart';
@@ -118,13 +119,43 @@ class _RecordingPageState extends ConsumerState<RecordingPage> {
     );
   }
 
-  /// 点击开始录制：校验剪贴板与健康状态
+  /// 根据缺失权限生成弹窗文案。
+  String _recordingPermissionDialogTitle(RecordingRequiredPermissions result) {
+    if (!result.cameraGranted && !result.microphoneGranted) {
+      return '录制需要开启相机和录音权限，请在系统设置中授权后重试';
+    }
+    if (!result.cameraGranted) {
+      return '录制需要开启相机权限，请在系统设置中授权后重试';
+    }
+    return '录制需要开启录音权限，请在系统设置中授权后重试';
+  }
+
+  /// 开始录制前检测相机、录音权限，未授予则弹窗并跳转系统设置。
+  Future<bool> _ensureRecordingPermissions() async {
+    final result = await ref
+        .read(recordingViewModelProvider.notifier)
+        .ensureCameraAndMicrophonePermissions();
+    if (result.allGranted) return true;
+    if (!mounted) return false;
+
+    await RecordDialog.showSingle(
+      context,
+      title: _recordingPermissionDialogTitle(result),
+      buttonText: '确定',
+      onPressed: openAppSettings,
+    );
+    return false;
+  }
+
+  /// 点击开始录制：校验剪贴板、权限与健康状态
   Future<void> _onStartRecording() async {
     final recordingInfo = ref.read(recordingViewModelProvider);
     if (!recordingInfo.hasClipboardFilename) {
       await _showNoPlayerInfoDialog();
       return;
     }
+    if (!await _ensureRecordingPermissions()) return;
+    if (!mounted) return;
     await _checkAndShowDeviceHealthAlerts();
     if (!mounted) return;
     await ref.read(recordingViewModelProvider.notifier).startRecording();