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/models/chat_models.dart

@@ -0,0 +1,45 @@
+class ChatTurnResponse {
+  const ChatTurnResponse({
+    required this.sessionId,
+    required this.replyText,
+    this.transcription,
+    this.replyAudioPath,
+    this.error,
+  });
+
+  final String sessionId;
+  final String replyText;
+  final String? transcription;
+  final String? replyAudioPath;
+  final String? error;
+
+  bool get isOk => error == null || error!.isEmpty;
+
+  factory ChatTurnResponse.fromJson(Map<String, dynamic> json) {
+    return ChatTurnResponse(
+      sessionId: json['session_id']?.toString() ?? '',
+      replyText: json['reply_text']?.toString() ?? '',
+      transcription: json['transcription']?.toString(),
+      replyAudioPath: json['reply_audio_path']?.toString(),
+      error: json['error']?.toString(),
+    );
+  }
+}
+
+enum ChatBubbleRole { user, assistant, system }
+
+class ChatBubble {
+  ChatBubble({
+    required this.role,
+    required this.text,
+    this.audioPath,
+    this.isPending = false,
+    DateTime? createdAt,
+  }) : createdAt = createdAt ?? DateTime.now();
+
+  final ChatBubbleRole role;
+  String text;
+  String? audioPath;
+  bool isPending;
+  final DateTime createdAt;
+}