diff --git a/src/frontend/src/store.ts b/src/frontend/src/store.ts
index 66787af..cd9a18c 100644
--- a/src/frontend/src/store.ts
+++ b/src/frontend/src/store.ts
@@ -411,6 +411,7 @@ export const useStore = create<AppStore>((set, get) => ({
   setSelectedProjectId: (pid) => {
     set({ selectedProjectId: pid });
     setApiProjectId(pid);
+    try { localStorage.setItem('selectedProjectId', pid || ''); } catch {}
     // 切换项目后重新加载
     get().loadLive();
     get().loadV2Tasks();