feat(k8s): M13 多集群资源对比看板 — GetMultiClusterComparison handler + ClusterComparePage (柱状图/雷达图/饼图/详细对比表)

frontend/src/App.tsx

@@ -25,6 +25,7 @@ import { KubernetesWorkloads } from '@/components/kubernetes/KubernetesWorkloads
 import PodMetricsPage from '@/components/kubernetes/PodMetricsPage';
 import EventsPage from '@/components/kubernetes/EventsPage';
 import CapacityPage from '@/components/kubernetes/CapacityPage';
+import ClusterComparePage from '@/components/kubernetes/ClusterComparePage';
 import { AlertManager } from '@/components/monitor/AlertManager';
 import { ApprovalFlowManager } from '@/components/approval/ApprovalFlow';
 import { ScriptManager } from '@/components/automation/ScriptManager';
@@ -80,9 +81,11 @@ function App() {
             {/* ================================================================ */}
             {/* Kubernetes — Kuboard-style routes                                */}
             {/* ================================================================ */}
-            {/* 集群列表 */}
+            {/* Kubernetes 集群列表 */}
             <Route path="kubernetes">
               <Route index element={<KubernetesClusters />} />
+              {/* 🆕 M13: 多集群资源对比看板（全局，不属于特定集群） */}
+              <Route path="compare" element={<ClusterComparePage />} />
               {/* 集群概览 (节点 + 命名空间列表) */}
               <Route path=":clusterCode">
                 <Route index element={<ClusterOverviewPage />} />