feat: 新增语音唤醒

唤醒的逻辑跟长按的逻辑不一样，不能像之前那样长按图标来录音，结束长按来结束录音

lib/manager.dart

@@ -1,5 +1,11 @@
 import 'dart:async';
+import 'dart:io';
+
+import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:porcupine_flutter/porcupine_error.dart';
+import 'package:porcupine_flutter/porcupine_manager.dart';
 
 import 'bloc/ai_chat_cubit.dart';
 import 'bloc/command_state.dart';
@@ -44,9 +50,103 @@ class AIChatAssistantManager {
     return _commandCubit!.stream;
   }
 
+  // --- Porcupine 唤醒词属性 ---
+
+  PorcupineManager? _porcupineManager;
+  final StreamController<void> _wakeWordController = StreamController<void>.broadcast();
+  bool _isWakeWordEnabled = false;
+  bool _wakeWordDetected = false;
+
+  // PicoVoice AccessKey
+  final String _picoAccessKey = "CRkyWZ3DRFXVogXEhE2eK2/ZN1q9YEYweTnjVWlve86nKAid5i1zsQ==";
+
+  // 资产逻辑路径 (用于 rootBundle.load)
+  static const String _keywordAssetPath = "packages/ai_chat_assistant/assets/zhongzhong_zh_android.ppn";
+  static const String _modelAssetPath = "packages/ai_chat_assistant/assets/porcupine_params_zh.pv";
+
+  // 真实文件系统路径 (Porcupine 使用)
+  String? _keywordFilePath;
+  String? _modelFilePath;
+
+  /// 监听唤醒词事件的 Stream
+  Stream<void> get onWakeWordDetected => _wakeWordController.stream;
+
+  /// 当前是否检测到了唤醒词
+  bool get isWakeWordDetected => _wakeWordDetected;
+
+  /// 将 Flutter asset 写入设备文件系统，返回其真实路径
+  Future<String> _extractAsset(String assetPath, String fileName) async {
+    final dir = await getApplicationSupportDirectory();
+    final file = File('${dir.path}/$fileName');
+    if (!file.existsSync()) {
+      final data = await rootBundle.load(assetPath);
+      await file.writeAsBytes(data.buffer.asUint8List(), flush: true);
+      debugPrint('Asset "$assetPath" extracted to "${file.path}"');
+    }
+    return file.path;
+  }
+
+  /// 开启或关闭唤醒词检测
+  Future<void> setWakeWordDetection(bool enable) async {
+    if (enable == _isWakeWordEnabled && _porcupineManager != null) {
+      return; // 状态未改变
+    }
+    _isWakeWordEnabled = enable;
+
+    if (enable) {
+      try {
+        // 确保关键词和模型文件已提取到文件系统
+        _keywordFilePath ??= await _extractAsset(_keywordAssetPath, "zhongzhong_zh_android.ppn");
+        _modelFilePath ??= await _extractAsset(_modelAssetPath, "porcupine_params_zh.pv");
+
+        _porcupineManager = await PorcupineManager.fromKeywordPaths(
+          _picoAccessKey,
+          [_keywordFilePath!],
+          _wakeWordDetectedCallback,
+          modelPath: _modelFilePath, // 中文模型必须指定 modelPath
+          errorCallback: _porcupineErrorCallback,
+          sensitivities: [0.6], // 可以调整灵敏度
+        );
+        await _porcupineManager?.start();
+        debugPrint("Porcupine manager started for wake-word detection.");
+      } on PorcupineException catch (e) {
+        debugPrint("Failed to init Porcupine: ${e.message}");
+        _isWakeWordEnabled = false;
+      }
+    } else {
+      await _porcupineManager?.stop();
+      await _porcupineManager?.delete();
+      _porcupineManager = null;
+      _wakeWordDetected = false; // 关闭时重置状态
+      debugPrint("Porcupine manager stopped and deleted.");
+    }
+  }
+
+  // 唤醒词检测回调
+  void _wakeWordDetectedCallback(int keywordIndex) {
+    // 我们只用了一个关键词，所以索引总是 0
+    if (keywordIndex == 0) {
+      _wakeWordDetected = true;
+      debugPrint("Wake-word '众众' detected!");
+      // 通知所有监听者
+      _wakeWordController.add(null);
+
+      // 可选：一段时间后自动重置状态
+      Future.delayed(const Duration(seconds: 2), () {
+        _wakeWordDetected = false;
+      });
+    }
+  }
+
+  void _porcupineErrorCallback(PorcupineException error) {
+    debugPrint("Porcupine error: ${error.message}");
+  }
+
   /// 释放资源
   void dispose() {
     _commandCubit?.close();
     _commandCubit = null;
+    _wakeWordController.close();
+    setWakeWordDetection(false); // 确保 Porcupine 停止并释放
   }
 }

lib/widgets/chat_popup.dart

@@ -1,4 +1,6 @@
+import 'dart:async';
 import 'dart:ui';
+import 'package:ai_chat_assistant/manager.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../pages/full_screen.dart';
@@ -30,6 +32,7 @@ class _ChatPopupState extends State<ChatPopup> with SingleTickerProviderStateMix
   final double _iconSizeDefault = 80.0;
   bool _isShowingPopup = false;
   late AnimationController _partScreenAnimationController;
+  StreamSubscription? _wakeWordSubscription;
 
   @override
   void initState() {
@@ -38,11 +41,21 @@ class _ChatPopupState extends State<ChatPopup> with SingleTickerProviderStateMix
       duration: const Duration(milliseconds: 250),
       vsync: this,
     );
+
+    // 订阅唤醒词事件
+    _wakeWordSubscription = AIChatAssistantManager.instance.onWakeWordDetected.listen((_) async {
+      // 在这里处理唤醒事件，例如显示聊天窗口
+      debugPrint("唤醒词被检测到，执行UI操作！");
+      final messageService = MessageService.instance;
+      _insertOverlay();
+      await messageService.startVoiceInput();
+    });
   }
 
   @override
   void dispose() {
     _partScreenAnimationController.dispose();
+    _wakeWordSubscription?.cancel();
     super.dispose();
   }