feat: M1 高级传输参数（P0）

- store: Local 增加 useEncryption/useCompression/bandwidthLimit/poolCount/metadatas/annotations；Remote 增加 transportProtocol/transportTls/transportPool/transportTlsServerName；新增 migrate() ALTER TABLE 迁移旧库

- render: 输出 transport 段（protocol/tls/poolCount）与 proxy 高级字段；补 TestRenderTransportAdvanced/OmittedWhenEmpty

- main: renderRemote 闭包透传 M1 字段到 render.Proxy

- web: LocalNode/RemoteNode 折叠高级区表单，types.ts 接口扩展

- 验证：go test 全绿、vue-tsc/build 通过、端到端 PUT canvas→frpc JSON 输出完整

web/src/components/LocalNode.vue

@@ -28,12 +28,32 @@
         </select>
       </label>
     </div>
+
+    <div class="adv">
+      <button class="adv-toggle" @click.stop="showAdv = !showAdv">
+        {{ showAdv ? '▾ 收起高级' : '▸ 高级' }}
+      </button>
+      <div v-if="showAdv" class="adv-body">
+        <label class="adv-check">
+          <input v-model="useEncryptionField" type="checkbox" /> 加密
+          (useEncryption)
+        </label>
+        <label class="adv-check">
+          <input v-model="useCompressionField" type="checkbox" /> 压缩
+          (useCompression)
+        </label>
+        <label>限速 <input v-model="bandwidthLimitField" placeholder="如 1MB" /></label>
+        <label>连接池 <input v-model.number="poolCountField" type="number" min="0" /></label>
+        <label>元数据(JSON) <input v-model="metadatasField" placeholder='{"env":"prod"}' /></label>
+        <label>注解(JSON) <input v-model="annotationsField" placeholder='{"owner":"ops"}' /></label>
+      </div>
+    </div>
   </div>
 </template>
 
 <script setup lang="ts">
 import { Handle, Position } from '@vue-flow/core'
-import { computed } from 'vue'
+import { computed, ref } from 'vue'
 import type { CanvasLocal } from '../types'
 
 const props = defineProps<{
@@ -59,6 +79,41 @@ const nameField = field('name')
 const ipField = field('ip')
 const portField = field('port')
 const protocolField = field('protocol')
+const useEncryptionField = field('useEncryption')
+const useCompressionField = field('useCompression')
+const bandwidthLimitField = field('bandwidthLimit')
+const poolCountField = field('poolCount')
+
+// map fields shown as JSON strings in the UI
+const showAdv = ref(false)
+const metadatasField = computed({
+  get: () => JSON.stringify(props.data.metadatas ?? {}),
+  set: (v: string) => {
+    let parsed: Record<string, string> = {}
+    if (v.trim()) {
+      try {
+        parsed = JSON.parse(v)
+      } catch {
+        return // keep old value on invalid JSON
+      }
+    }
+    emit('update:data', { ...props.data, metadatas: parsed })
+  },
+})
+const annotationsField = computed({
+  get: () => JSON.stringify(props.data.annotations ?? {}),
+  set: (v: string) => {
+    let parsed: Record<string, string> = {}
+    if (v.trim()) {
+      try {
+        parsed = JSON.parse(v)
+      } catch {
+        return
+      }
+    }
+    emit('update:data', { ...props.data, annotations: parsed })
+  },
+})
 </script>
 
 <style scoped lang="scss">
@@ -162,5 +217,54 @@ const protocolField = field('protocol')
       flex: 0 0 64px;
     }
   }
+
+  .adv {
+    margin-top: 6px;
+    .adv-toggle {
+      border: 1px dashed #a5d6a7;
+      background: transparent;
+      color: #558b2f;
+      font-size: 11px;
+      border-radius: 6px;
+      padding: 2px 8px;
+      cursor: pointer;
+    }
+    .adv-body {
+      display: flex;
+      flex-direction: column;
+      gap: 4px;
+      margin-top: 6px;
+      padding: 6px;
+      background: rgba(76, 175, 80, 0.06);
+      border-radius: 8px;
+
+      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;
+          }
+        }
+      }
+      .adv-check {
+        font-size: 11px;
+      }
+    }
+  }
 }
 </style>