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/src/components/LocalNode.vue

@@ -0,0 +1,166 @@
+<template>
+  <div class="local-node" :class="{ selected, conflicted }">
+    <!-- source handle (right) connects to remote -->
+    <Handle type="source" :position="Position.Right" />
+
+    <div class="node-head">
+      <span class="node-icon">⬢</span>
+      <input v-model="nameField" class="name-input" />
+      <button
+        class="del-btn"
+        title="删除"
+        @click.stop="emit('remove', props.data.name)"
+      >
+        ×
+      </button>
+    </div>
+
+    <div class="fields">
+      <label>IP <input v-model="ipField" /></label>
+      <label>端口 <input v-model.number="portField" type="number" /></label>
+      <label
+        >协议
+        <select v-model="protocolField">
+          <option value="tcp">tcp</option>
+          <option value="udp">udp</option>
+          <option value="http">http</option>
+          <option value="https">https</option>
+        </select>
+      </label>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { Handle, Position } from '@vue-flow/core'
+import { computed } from 'vue'
+import type { CanvasLocal } from '../types'
+
+const props = defineProps<{
+  data: CanvasLocal
+  selected?: boolean
+  conflicted?: boolean
+}>()
+
+const emit = defineEmits<{
+  (e: 'update:data', data: CanvasLocal): void
+  (e: 'remove', name: string): void
+}>()
+
+const field = <K extends keyof CanvasLocal>(key: K) =>
+  computed({
+    get: () => props.data[key],
+    set: (val: CanvasLocal[K]) => {
+      emit('update:data', { ...props.data, [key]: val })
+    },
+  })
+
+const nameField = field('name')
+const ipField = field('ip')
+const portField = field('port')
+const protocolField = field('protocol')
+</script>
+
+<style scoped lang="scss">
+.local-node {
+  min-width: 190px;
+  border-radius: 14px 14px 14px 4px;
+  background: #e8f5e9;
+  border: 2px solid #4caf50;
+  box-shadow: 0 2px 8px rgba(76, 175, 80, 0.18);
+  padding: 8px 10px;
+
+  &.selected {
+    border-color: #ffd54f;
+    box-shadow: 0 0 0 3px rgba(255, 213, 79, 0.45);
+  }
+
+  &.conflicted {
+    border-color: #f5222d;
+    box-shadow: 0 0 0 3px rgba(245, 34, 45, 0.4);
+    animation: conflict-pulse 1.2s ease-in-out infinite;
+  }
+}
+
+@keyframes conflict-pulse {
+  0%,
+  100% {
+    box-shadow: 0 0 0 3px rgba(245, 34, 45, 0.4);
+  }
+  50% {
+    box-shadow: 0 0 0 5px rgba(245, 34, 45, 0.7);
+  }
+}
+
+.node-head {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+
+  .node-icon {
+    color: #4caf50;
+    font-size: 16px;
+  }
+}
+
+.name-input {
+  flex: 1;
+  min-width: 0;
+  border: none;
+  background: transparent;
+  font-weight: 600;
+  font-size: 14px;
+  color: #2e7d32;
+  &:focus {
+    outline: 1px solid #4caf50;
+  }
+}
+
+.del-btn {
+  border: none;
+  background: transparent;
+  color: #81c784;
+  font-size: 16px;
+  cursor: pointer;
+  line-height: 1;
+  &:hover {
+    color: #c62828;
+  }
+}
+
+.fields {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  margin-top: 6px;
+
+  label {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    font-size: 11px;
+    color: #558b2f;
+
+    input,
+    select {
+      flex: 1;
+      min-width: 0;
+      border: 1px solid #a5d6a7;
+      border-radius: 6px;
+      padding: 2px 6px;
+      font-size: 12px;
+      background: #fff;
+      color: #333;
+      &:focus {
+        outline: none;
+        border-color: #4caf50;
+      }
+    }
+
+    input[type='number'] {
+      width: 64px;
+      flex: 0 0 64px;
+    }
+  }
+}
+</style>