diff --git a/src/frontend/src/store.ts b/src/frontend/src/store.ts
index 07a9bea..66787af 100644
--- a/src/frontend/src/store.ts
+++ b/src/frontend/src/store.ts
@@ -476,7 +476,20 @@ export const useStore = create<AppStore>((set, get) => ({
   // v2.6: 加载任务详情（expand=all）
   loadV2TaskDetail: async (taskId: string) => {
     const pid = get().selectedProjectId;
-    if (!pid) return;
+    if (!pid) {
+      // 全部任务模式：从 v2tasks 中找任务的 _projectId
+      const task = (get().v2tasks || []).find((t: any) => t.id === taskId);
+      if (task && (task as any)._projectId) {
+        try {
+          const res = await fetch(`/api/projects/${(task as any)._projectId}/tasks/${taskId}?expand=all`);
+          if (res.ok) {
+            const detail = await res.json();
+            set({ v2taskDetail: { ...detail, _projectId: (task as any)._projectId } });
+          }
+        } catch { /* silently fail */ }
+      }
+      return;
+    }
     try {
       const res = await fetch(`/api/projects/${pid}/tasks/${taskId}?expand=all`);
       if (res.ok) {