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/settings.gradle

@@ -21,8 +21,8 @@ pluginManagement {
 
 plugins {
     id 'dev.flutter.flutter-plugin-loader' version '1.0.0'
-    id 'com.android.application' version '8.3.2' apply false
-    id 'org.jetbrains.kotlin.android' version '1.9.22' apply false
+    id 'com.android.application' version '8.7.3' apply false
+    id 'org.jetbrains.kotlin.android' version '2.1.0' apply false
 }
 
 dependencyResolutionManagement {