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/android/app/build.gradle

@@ -7,6 +7,7 @@ plugins {
 android {
     namespace 'com.showen.flutter'
     compileSdk flutter.compileSdkVersion
+    ndkVersion = "28.2.13676358"
 
     defaultConfig {
         applicationId 'com.showen.flutter'