feat: M2.1 客户端骨架、BLE 修复、仓库整理与现状板

- BLE: 修复 BlueZ LocalName 与 Includes 冲突，串行注册与退避
- HTTP: 语音对话补 Live2D talking 标志与 session；Web 补 X-Session-Id
- Flutter: 角色/对话/模型页 + API，Gradle/依赖升级，麦克风权限
- 文档: 新增 docs/STATUS.md，校准 CLAUDE/PROGRESS/README
- 清理: 移除根目录截图与临时模型，运维脚本迁入 scripts/device

clients/flutter/lib/services/http_api_service.dart

@@ -5,8 +5,11 @@ import 'dart:typed_data';
 
 import 'package:http/http.dart' as http;
 
+import '../models/ai_model.dart';
 import '../models/api_response.dart';
 import '../models/ble_status.dart';
+import '../models/character_pack.dart';
+import '../models/chat_models.dart';
 import '../models/player_status.dart';
 import '../models/video_item.dart';
 import '../models/wifi_network.dart';
@@ -300,6 +303,118 @@ class HttpApiService {
     return ApiResponse.fromJson(_decodeMap(response.body));
   }
 
+  Future<AvailableConfigs> getAvailableCharacterConfigs() async {
+    final map = await getAvailableConfigs();
+    return AvailableConfigs.fromJson(map);
+  }
+
+  // ── M2.1 AI 对话 / 模型管理 ──
+
+  Future<ChatTurnResponse> chatText({
+    required String text,
+    String? sessionId,
+  }) async {
+    final response = await _client.post(
+      _uri('/api/chat/text'),
+      headers: _jsonHeaders,
+      body: jsonEncode(<String, dynamic>{
+        'text': text,
+        if (sessionId != null && sessionId.isNotEmpty) 'session_id': sessionId,
+      }),
+    );
+    // AI 错误也以 JSON ChatResponse 返回（可能是 5xx）
+    final map = _decodeMap(response.body);
+    final result = ChatTurnResponse.fromJson(map);
+    if (response.statusCode >= 200 && response.statusCode < 300) {
+      return result;
+    }
+    if (result.error != null && result.error!.isNotEmpty) {
+      return result;
+    }
+    throw ApiException(
+      map['message']?.toString() ?? '对话失败 (${response.statusCode})',
+      statusCode: response.statusCode,
+    );
+  }
+
+  Future<ChatTurnResponse> chatAudio({
+    required List<int> bytes,
+    String format = 'wav',
+    String? sessionId,
+  }) async {
+    final response = await _client.post(
+      _uri('/api/chat/audio'),
+      headers: <String, String>{
+        'Content-Type': 'application/octet-stream',
+        'Accept': 'application/json',
+        'X-Audio-Format': format,
+        if (sessionId != null && sessionId.isNotEmpty) 'X-Session-Id': sessionId,
+      },
+      body: bytes,
+    );
+    final map = _decodeMap(response.body);
+    final result = ChatTurnResponse.fromJson(map);
+    if (response.statusCode >= 200 && response.statusCode < 300) {
+      return result;
+    }
+    if (result.error != null && result.error!.isNotEmpty) {
+      return result;
+    }
+    throw ApiException(
+      map['message']?.toString() ?? '语音对话失败 (${response.statusCode})',
+      statusCode: response.statusCode,
+    );
+  }
+
+  String chatAudioFileUrl(String absolutePath) {
+    return _uri(
+      '/api/chat/audio/file',
+      <String, String>{'path': absolutePath},
+    ).toString();
+  }
+
+  Future<ModelsSnapshot> getModels() async {
+    final response = await _client.get(_uri('/api/models'));
+    _ensureSuccess(response);
+    return ModelsSnapshot.fromJson(_decodeMap(response.body));
+  }
+
+  Future<ApiResponse> downloadModel(String modelId) async {
+    final response = await _client.post(
+      _uri('/api/models/download'),
+      headers: _jsonHeaders,
+      body: jsonEncode(<String, dynamic>{'model_id': modelId}),
+    );
+    _ensureSuccess(response);
+    return ApiResponse.fromJson(_decodeMap(response.body));
+  }
+
+  Future<ApiResponse> switchModel({
+    required String modelId,
+    required String kind,
+  }) async {
+    final response = await _client.post(
+      _uri('/api/models/switch'),
+      headers: _jsonHeaders,
+      body: jsonEncode(<String, dynamic>{
+        'model_id': modelId,
+        'kind': kind,
+      }),
+    );
+    _ensureSuccess(response);
+    return ApiResponse.fromJson(_decodeMap(response.body));
+  }
+
+  Future<ApiResponse> deleteModel(String modelId) async {
+    final response = await _client.post(
+      _uri('/api/models/delete'),
+      headers: _jsonHeaders,
+      body: jsonEncode(<String, dynamic>{'model_id': modelId}),
+    );
+    _ensureSuccess(response);
+    return ApiResponse.fromJson(_decodeMap(response.body));
+  }
+
   Future<List<Map<String, dynamic>>> listFiles(String dirKey, [String? path]) async {
     final response = await _client.get(
       _uri('/api/files/$dirKey', _pathQuery(path)),