fix: reduce MCP server status polling frequency (#7399)

Author: M1LKT

dashboard/src/components/extension/McpServersSection.vue

@@ -284,8 +284,9 @@ export default {
   mounted() {
     this.getServers();
     this.refreshInterval = setInterval(() => {
+      // 轮询时间延长到30秒，减少服务器压力，同时保持数据相对新鲜
       this.getServers();
-    }, 5000);
+    }, 30000);
   },
   unmounted() {
     if (this.refreshInterval) {

dashboard/src/views/ExtensionPage.vue

@@ -162,7 +162,7 @@ const {
           <InstalledPluginsTab :state="pageState" />
 
           <!-- 指令面板标签页内容 -->
-          <v-tab-item v-show="activeTab === 'components'">
+          <v-tab-item v-if="activeTab === 'components'">
             <div class="mb-4 pt-4 pb-4">
               <div class="d-flex align-center flex-wrap" style="gap: 12px">
                 <h2 class="text-h2 mb-0">{{ tm("tabs.handlersOperation") }}</h2>
@@ -180,7 +180,7 @@ const {
           </v-tab-item>
 
           <!-- 已安装的 MCP 服务器标签页内容 -->
-          <v-tab-item v-show="activeTab === 'mcp'">
+          <v-tab-item v-if="activeTab === 'mcp'">
             <div class="mb-4 pt-4 pb-4">
               <div class="d-flex align-center flex-wrap" style="gap: 12px">
                 <h2 class="text-h2 mb-0">{{ tm("tabs.installedMcpServers") }}</h2>
@@ -198,7 +198,7 @@ const {
           </v-tab-item>
 
           <!-- Skills 标签页内容 -->
-          <v-tab-item v-show="activeTab === 'skills'">
+          <v-tab-item v-if="activeTab === 'skills'">
             <div class="mb-4 pt-4 pb-4">
               <div class="d-flex align-center flex-wrap" style="gap: 12px">
                 <h2 class="text-h2 mb-0">{{ tm("tabs.skills") }}</h2>