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/ai_model.dart

@@ -0,0 +1,123 @@
+class AiModelInfo {
+  const AiModelInfo({
+    required this.id,
+    required this.kind,
+    required this.name,
+    required this.version,
+    required this.size,
+    required this.memoryRequired,
+    required this.recommendedTier,
+    required this.downloaded,
+    required this.downloadProgress,
+  });
+
+  final String id;
+  final String kind;
+  final String name;
+  final String version;
+  final int size;
+  final int memoryRequired;
+  final String recommendedTier;
+  final bool downloaded;
+  final int downloadProgress;
+
+  String get kindLabel {
+    switch (kind.toLowerCase()) {
+      case 'llm':
+        return 'LLM';
+      case 'asr':
+        return 'ASR';
+      case 'tts':
+        return 'TTS';
+      default:
+        return kind.toUpperCase();
+    }
+  }
+
+  String get sizeLabel => _formatBytes(size);
+  String get memoryLabel => _formatBytes(memoryRequired);
+
+  factory AiModelInfo.fromJson(Map<String, dynamic> json) {
+    return AiModelInfo(
+      id: json['id']?.toString() ?? '',
+      kind: json['kind']?.toString() ?? '',
+      name: json['name']?.toString() ?? json['id']?.toString() ?? '',
+      version: json['version']?.toString() ?? '',
+      size: _asInt(json['size']),
+      memoryRequired: _asInt(json['memory_required']),
+      recommendedTier: json['recommended_tier']?.toString() ?? '',
+      downloaded: json['downloaded'] == true,
+      downloadProgress: _asInt(json['download_progress']),
+    );
+  }
+
+  static int _asInt(dynamic value) {
+    if (value is int) return value;
+    if (value is num) return value.toInt();
+    return int.tryParse(value?.toString() ?? '') ?? 0;
+  }
+
+  static String _formatBytes(int bytes) {
+    if (bytes <= 0) return '0 B';
+    if (bytes < 1024) return '$bytes B';
+    if (bytes < 1024 * 1024) {
+      return '${(bytes / 1024).toStringAsFixed(1)} KB';
+    }
+    if (bytes < 1024 * 1024 * 1024) {
+      return '${(bytes / (1024 * 1024)).toStringAsFixed(1)} MB';
+    }
+    return '${(bytes / (1024 * 1024 * 1024)).toStringAsFixed(2)} GB';
+  }
+}
+
+class ModelsSnapshot {
+  const ModelsSnapshot({
+    required this.models,
+    required this.active,
+    required this.usedSpace,
+    required this.quota,
+  });
+
+  final List<AiModelInfo> models;
+  final Map<String, String> active;
+  final int usedSpace;
+  final int quota;
+
+  String get usedLabel => AiModelInfo._formatBytes(usedSpace);
+  String get quotaLabel => AiModelInfo._formatBytes(quota);
+  double get usageRatio => quota <= 0 ? 0 : (usedSpace / quota).clamp(0.0, 1.0);
+
+  bool isActive(AiModelInfo model) {
+    final current = active[model.kind.toLowerCase()];
+    return current != null && current == model.id;
+  }
+
+  factory ModelsSnapshot.fromJson(Map<String, dynamic> json) {
+    final rawModels = json['models'];
+    final models = <AiModelInfo>[];
+    if (rawModels is List) {
+      for (final item in rawModels) {
+        if (item is Map<String, dynamic>) {
+          models.add(AiModelInfo.fromJson(item));
+        } else if (item is Map) {
+          models.add(AiModelInfo.fromJson(Map<String, dynamic>.from(item)));
+        }
+      }
+    }
+
+    final active = <String, String>{};
+    final rawActive = json['active'];
+    if (rawActive is Map) {
+      rawActive.forEach((key, value) {
+        active[key.toString().toLowerCase()] = value.toString();
+      });
+    }
+
+    return ModelsSnapshot(
+      models: models,
+      active: active,
+      usedSpace: AiModelInfo._asInt(json['used_space']),
+      quota: AiModelInfo._asInt(json['quota']),
+    );
+  }
+}