feat(frontend): 添加配置中心管理页面骨架

页面：
- views/config/ConfigCenter.vue，配置中心管理

功能：
- 统计卡片（接入机房数、配置项总数、接入业务线）
- Apollo Portal 统一入口
- 机房配置中心列表（按 Cluster 维度展示）

Apollo 集群：YZH、XS、JF、达拉斯、新加坡、香港、东南亚

frontend/src/views/config/ConfigCenter.vue

@@ -0,0 +1,349 @@
+<template>
+  <div>
+    <div class="page-head">
+      <div>
+        <h1>配置中心管理</h1>
+        <p>Apollo 配置中心（携程开源）· 按机房部署 Config Service Cluster，Portal 统一入口管理</p>
+      </div>
+      <span class="env-pill">● 运行中</span>
+    </div>
+
+    <div class="stat-row">
+      <div class="stat-card">
+        <div class="label">接入机房数</div>
+        <div class="value">3 / 7</div>
+        <div class="delta">国内 3 已接入 · 海外 4 建设中</div>
+      </div>
+      <div class="stat-card">
+        <div class="label">Apollo Cluster</div>
+        <div class="value">7</div>
+        <div class="delta">按机房 1:1 划分</div>
+      </div>
+      <div class="stat-card">
+        <div class="label">配置项总数</div>
+        <div class="value">1,260</div>
+        <div class="delta">Namespace 38 个</div>
+      </div>
+      <div class="stat-card">
+        <div class="label">接入业务线</div>
+        <div class="value">2 / 5</div>
+        <div class="delta">kodo · las 已接入</div>
+      </div>
+      <div class="stat-card">
+        <div class="label">同步状态</div>
+        <div class="value" style="color: var(--accent); font-size: 16px">● 正常</div>
+        <div class="delta">最近发布 09:12:30</div>
+      </div>
+    </div>
+
+    <div class="panel">
+      <div class="panel-head">
+        <h3>统一入口</h3>
+        <span class="meta">Apollo Portal · LDAP 单点登录</span>
+      </div>
+      <div class="panel-body" style="padding: 16px">
+        <div class="ext-card">
+          <div class="ext-top">
+            <div class="ext-logo" style="background: #1C2A3A; color: #8EC8FF">AP</div>
+            <div>
+              <h4>Apollo Portal</h4>
+              <div class="ext-sub">apollo.xinfra.internal</div>
+            </div>
+          </div>
+          <p>统一管理 7 个机房 Config Service Cluster 的配置发布、灰度、回滚与变更审计，所有机房配置项均可在此单一入口检索与编辑，发布后由各机房 Config Service 就近下发。</p>
+          <div class="sso-row">
+            <span class="sso-dot"></span>LDAP 原生配置接入 · 已上线
+          </div>
+          <el-button type="primary" style="margin-top: 8px">打开 Apollo Portal ↗</el-button>
+        </div>
+      </div>
+    </div>
+
+    <div class="panel">
+      <div class="panel-head">
+        <h3>机房配置中心列表</h3>
+        <span class="meta">Cluster 维度 · Config Service 部署明细</span>
+      </div>
+      <div class="panel-body">
+        <table>
+          <thead>
+            <tr>
+              <th>机房 / 区域</th>
+              <th>Apollo Cluster</th>
+              <th>Config Service 地址</th>
+              <th>承载方式</th>
+              <th>接入业务线</th>
+              <th>配置项数</th>
+              <th>状态</th>
+            </tr>
+          </thead>
+          <tbody>
+            <tr v-for="cluster in clusters" :key="cluster.name" class="tr-hover">
+              <td><span class="tag" :class="cluster.zoneClass">{{ cluster.name }}</span></td>
+              <td class="mono">cluster={{ cluster.cluster }}</td>
+              <td class="mono" style="font-size: 11px">{{ cluster.address }}</td>
+              <td class="mono">{{ cluster.type }}</td>
+              <td class="mono">{{ cluster.biz }}</td>
+              <td class="mono">{{ cluster.items }}</td>
+              <td :class="['status-text', cluster.statusClass]">● {{ cluster.status }}</td>
+            </tr>
+          </tbody>
+        </table>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref } from 'vue'
+
+const clusters = ref([
+  { name: 'YZH 机房', zoneClass: 'zone-a', cluster: 'yzh', address: 'config-yzh.xinfra.internal:8080', type: '容器化 · K8s Service', biz: 'kodo', items: 486, status: '运行中', statusClass: 'ok' },
+  { name: 'XS 机房', zoneClass: 'zone-b', cluster: 'xs', address: 'config-xs.xinfra.internal:8080', type: '容器化 · K8s Service', biz: 'las', items: 398, status: '运行中', statusClass: 'ok' },
+  { name: 'JF 机房', zoneClass: 'zone-c', cluster: 'jf', address: 'config-jf.xinfra.internal:8080', type: '容器化 · K8s Service', biz: '灵矽', items: 376, status: '灰度接入中', statusClass: 'warn' },
+  { name: '达拉斯 IDC', zoneClass: '', cluster: 'dallas', address: '—', type: '容器化 · K8s Service', biz: '—', items: 0, status: '建设中', statusClass: 'idle' },
+  { name: '新加坡 IDC', zoneClass: '', cluster: 'singapore', address: '—', type: '容器化 · K8s Service', biz: '—', items: 0, status: '建设中', statusClass: 'idle' },
+  { name: '香港 IDC', zoneClass: '', cluster: 'hk', address: '—', type: '容器化 · K8s Service', biz: '—', items: 0, status: '待启动', statusClass: 'idle' },
+  { name: '东南亚 IDC', zoneClass: '', cluster: 'sea', address: '—', type: '容器化 · K8s Service', biz: '—', items: 0, status: '待启动', statusClass: 'idle' },
+])
+</script>
+
+<style scoped>
+.page-head {
+  display: flex;
+  align-items: flex-end;
+  justify-content: space-between;
+  margin-bottom: 18px;
+}
+
+.page-head h1 {
+  font-size: 19px;
+  margin: 0 0 4px;
+  font-weight: 700;
+}
+
+.page-head p {
+  margin: 0;
+  color: var(--text-dim);
+  font-size: 12.5px;
+}
+
+.env-pill {
+  font-family: var(--mono);
+  font-size: 11px;
+  color: var(--accent);
+  border: 1px solid var(--accent-dim);
+  background: #0F261D;
+  padding: 3px 9px;
+  border-radius: 20px;
+  letter-spacing: 0.4px;
+}
+
+.stat-row {
+  display: grid;
+  grid-template-columns: repeat(5, 1fr);
+  gap: 12px;
+  margin-bottom: 20px;
+}
+
+.stat-card {
+  background: var(--bg-panel);
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  padding: 14px 16px;
+}
+
+.stat-card .label {
+  font-size: 11px;
+  color: var(--text-dim);
+  margin-bottom: 8px;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+
+.stat-card .value {
+  font-family: var(--mono);
+  font-size: 24px;
+  font-weight: 600;
+}
+
+.stat-card .delta {
+  font-size: 11px;
+  color: var(--text-dim);
+  margin-top: 4px;
+}
+
+.panel {
+  background: var(--bg-panel);
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  margin-bottom: 18px;
+}
+
+.panel-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 13px 16px;
+  border-bottom: 1px solid var(--line-soft);
+}
+
+.panel-head h3 {
+  margin: 0;
+  font-size: 13.5px;
+  font-weight: 600;
+}
+
+.panel-head .meta {
+  font-size: 11.5px;
+  color: var(--text-dim);
+  font-family: var(--mono);
+}
+
+.panel-body {
+  padding: 4px 0;
+}
+
+.ext-card {
+  background: var(--bg-panel);
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  padding: 18px;
+  max-width: 560px;
+}
+
+.ext-top {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-bottom: 10px;
+}
+
+.ext-logo {
+  width: 38px;
+  height: 38px;
+  border-radius: 8px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-family: var(--mono);
+  font-weight: 700;
+  font-size: 13px;
+}
+
+h4 {
+  margin: 0;
+  font-size: 14px;
+}
+
+.ext-sub {
+  font-size: 11px;
+  color: var(--text-dim);
+  font-family: var(--mono);
+}
+
+p {
+  font-size: 12px;
+  color: var(--text-mid);
+  line-height: 1.6;
+  margin: 0 0 10px;
+}
+
+.sso-row {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 11px;
+  color: var(--text-dim);
+}
+
+.sso-dot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: var(--accent);
+}
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 12.5px;
+}
+
+th {
+  text-align: left;
+  color: var(--text-dim);
+  font-weight: 500;
+  font-size: 11px;
+  text-transform: uppercase;
+  letter-spacing: 0.4px;
+  padding: 9px 16px;
+  border-bottom: 1px solid var(--line-soft);
+}
+
+td {
+  padding: 11px 16px;
+  border-bottom: 1px solid var(--line-soft);
+  color: var(--text-mid);
+}
+
+tr:last-child td {
+  border-bottom: none;
+}
+
+tr.tr-hover:hover td {
+  background: var(--bg-panel-2);
+}
+
+.mono {
+  font-family: var(--mono);
+}
+
+.tag {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  font-family: var(--mono);
+  font-size: 10.5px;
+  padding: 2px 8px;
+  border-radius: 4px;
+  border: 1px solid var(--line);
+  color: var(--text-mid);
+}
+
+.tag.zone-a {
+  color: #8EC8FF;
+  border-color: #1C3A5C;
+  background: #0E1C2C;
+}
+
+.tag.zone-b {
+  color: #C9A6FF;
+  border-color: #3A2C5C;
+  background: #1A1430;
+}
+
+.tag.zone-c {
+  color: #FFC97A;
+  border-color: #5C4A1C;
+  background: #241B0A;
+}
+
+.status-text {
+  font-size: 12px;
+  display: flex;
+  align-items: center;
+}
+
+.status-text.ok {
+  color: var(--accent);
+}
+
+.status-text.warn {
+  color: var(--warn);
+}
+
+.status-text.idle {
+  color: var(--text-dim);
+}
+</style>