perf(web): 优化大数据量页面切换与聚合性能

apps/web/app/workspace/page.tsx

@@ -13,7 +13,7 @@ import { useAuthStore } from '@/stores/useAuthStore';
 import { useTaskWorklogStore } from '@/stores/useTaskWorklogStore';
 import { useWorkActivityStore } from '@/stores/useWorkActivityStore';
 import { flattenVersions } from '@/lib/derive';
-import { aggregateWorkItems, WORK_ITEM_TYPE_LABEL } from '@/lib/workspace-engine';
+import { aggregateWorkItems, getWorkspacePendingCountByVersion, WORK_ITEM_TYPE_LABEL } from '@/lib/workspace-engine';
 import type { WorkItem, WorkItemType } from '@/lib/workspace-engine';
 import { DailyReportPanel } from '@/components/workspace/DailyReportPanel';
 import { PlanDetailDrawer } from '@/components/version/PlanDetailDrawer';
@@ -96,6 +96,7 @@ export default function WorkspacePage() {
     aggregateWorkItems(userName, plans, devTasks, testCases, bugs, versionMap, requirementVersionMap),
     [userName, plans, devTasks, testCases, bugs, versionMap, requirementVersionMap]
   );
+  const pendingCountByVersion = useMemo(() => getWorkspacePendingCountByVersion(workItems), [workItems]);
 
   // 构建树：只显示跟自己有关的产品/项目/版本
   const tree = useMemo(() => {
@@ -108,14 +109,14 @@ export default function WorkspacePage() {
       const prod = productMap.get(v.productName)!;
       if (!prod.projects.has(v.projectName)) prod.projects.set(v.projectName, { name: v.projectName, versions: [] });
       const proj = prod.projects.get(v.projectName)!;
-      const pending = workItems.filter((i) => i.versionId === v.id && !i.completed).length;
+      const pending = pendingCountByVersion.get(v.id) ?? 0;
       if (!proj.versions.find((ver) => ver.id === v.id)) {
         proj.versions.push({ id: v.id, name: v.name, status: v.status, pendingCount: pending });
       }
     });
 
     return productMap;
-  }, [allVersions, workItems]);
+  }, [allVersions, pendingCountByVersion, workItems]);
 
   const filteredItems = useMemo(() => {
     let items = workItems;