webui4frpc: 独立可用的可视化 frpc 控制器 (M0)

- 零 frp 源码依赖，单二进制 (Go + Vue3 + VueFlow + Element Plus)
- 画布多对多连线，渲染 tcp/udp/http/https frpc 配置
- worker 进程管理：自愈、日志轮转、崩溃退避重启
- frpc 一键安装 (GitHub Releases) + 手动指定路径
- 三页 UI：状态(默认)/连接配置/设置
- 状态页实时节点/转发状态，节点可增删改启停
- 画布冲突检查：端口/域名冲突标红 + 弹窗拦截保存
- backend 单测覆盖 store/render/process/httpapi/install
- plan.md + FRPC_FEATURES_AUDIT.md 文档

web/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "webui4frpc-web",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vue-tsc --noEmit && vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@vue-flow/background": "^1.3.2",
+    "@vue-flow/core": "^1.48.2",
+    "element-plus": "^2.14.3",
+    "pinia": "^3.0.4",
+    "vue": "^3.5.40",
+    "vue-router": "^4.5.0"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^6.0.3",
+    "@vue/tsconfig": "^0.8.1",
+    "sass-embedded": "^1.102.0",
+    "typescript": "^5.9.3",
+    "vite": "^7.3.0",
+    "vue-tsc": "^3.3.8"
+  }
+}