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/manifest.json

@@ -0,0 +1,54 @@
+{
+  "name": "DevFlow",
+  "appid": "PLACEHOLDER",
+  "description": "DevFlow 远程 AI Chat — 跨端操作桌面端开发助手",
+  "versionName": "0.1.0",
+  "versionCode": 100,
+  "transformPx": false,
+  "app-plus": {
+    "usingComponents": true,
+    "splashscreen": {
+      "alwaysShowBeforeRender": true,
+      "waiting": true,
+      "autoclose": true,
+      "delay": 0
+    },
+    "modules": {},
+    "distribute": {
+      "android": {
+        "permissions": [
+          "<uses-permission android:name=\"android.permission.INTERNET\"/>"
+        ]
+      },
+      "ios": {},
+      "sdkConfigs": {}
+    }
+  },
+  "quickapp": {},
+  "mp-weixin": {
+    "appid": "PLACEHOLDER",
+    "setting": {
+      "urlCheck": false,
+      "es6": true,
+      "minified": true,
+      "postcss": true
+    },
+    "usingComponents": true,
+    "permission": {},
+    "requiredBackgroundModes": [],
+    "requiredPrivateInfos": [],
+    "lazyCodeLoading": "requiredComponents"
+  },
+  "h5": {
+    "title": "DevFlow Mini",
+    "router": {
+      "mode": "hash",
+      "base": "./"
+    },
+    "devServer": {
+      "port": 8081,
+      "https": false
+    }
+  },
+  "vueVersion": "3"
+}