diff --git a/src/frontend/src/store.ts b/src/frontend/src/store.ts
index bdac68a..27583e6 100644
--- a/src/frontend/src/store.ts
+++ b/src/frontend/src/store.ts
@@ -415,22 +415,26 @@ export const useStore = create<AppStore>((set, get) => ({
     set({ v2tasksLoading: true });
     try {
       if (!pid) {
-        // 全部任务模式：聚合所有项目（排除 _mail）
+        // 全部任务模式：聚合所有项目（排除 _mail），限制最多50个项目
         const projRes = await fetch('/api/projects');
         if (!projRes.ok) { set({ v2tasks: [], v2tasksLoading: false }); return; }
         const projData = await projRes.json();
-        const allPids = Object.keys(projData.projects || {}).filter(p => !p.startsWith('_'));
+        const allPids = Object.keys(projData.projects || {}).filter(p => !p.startsWith('_')).slice(0, 50);
         const allTasks: any[] = [];
-        for (const p of allPids) {
-          try {
+        // 并行请求，每批10个
+        for (let i = 0; i < allPids.length; i += 10) {
+          const batch = allPids.slice(i, i + 10);
+          const results = await Promise.allSettled(batch.map(async (p) => {
             const r = await fetch(`/api/projects/${p}/tasks`);
             if (r.ok) {
               const d = await r.json();
-              for (const t of (d.tasks || [])) {
-                allTasks.push({ ...t, _projectId: p, _projectName: (projData.projects[p] as any)?.name || p });
-              }
+              return (d.tasks || []).map((t: any) => ({ ...t, _projectId: p, _projectName: (projData.projects[p] as any)?.name || p }));
             }
-          } catch { /* skip */ }
+            return [];
+          }));
+          for (const r of results) {
+            if (r.status === 'fulfilled') allTasks.push(...r.value);
+          }
         }
         set({ v2tasks: allTasks });
       } else {