新增: df-miniapp uni-app跨端AI Chat(WS连relay透传+18变体AiChatEvent镜像)

- 脚手架: uni-app vue3 ts + 微信小程序manifest + pages(chat/conversations)+暗色主题
- WS客户端(ws.ts): uni.connectSocket连relay /ws/miniapp + Hello握手 + 指数退避重连 + 心跳Ping + JSON透传分派
- 类型镜像: events.ts AiChatEvent 18变体(对齐mod.rs grep核验) + relay.ts协议(BroadcastMessage/Hello/ControlMessage/MiniCommand)
- useAiChat: 18变体分派状态机(TextDelta累积/AgentRound flush/Tool状态/ConvState驱动generating) + send/stop/regenerate/switch + 乐观渲染
- 页面: chat(消息气泡/流式渲染/输入栏/工具调用展示) + conversations(列表占位)
- vue-tsc零错; 核验修正注释(变体数22→18, 心跳heartbeat→ping)
- 待对齐(Phase3联调): miniapp MiniCommand{cmd,args} vs df-tunnel TunnelCommand{kind,...} 格式需统一

df-miniapp/tsconfig.json

@@ -0,0 +1,25 @@
+{
+  "extends": "@vue/tsconfig/tsconfig.json",
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "strict": true,
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "jsx": "preserve",
+    "isolatedModules": true,
+    "resolveJsonModule": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "useDefineForClassFields": true,
+    "lib": ["ES2020", "DOM"],
+    "types": ["@dcloudio/types", "@types/node"],
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "include": ["src/**/*.ts", "src/**/*.d.ts", "src/**/*.tsx", "src/**/*.vue"],
+  "exclude": ["node_modules", "dist", "unpackage"]
+}