diff --git a/src/frontend/src/store.ts b/src/frontend/src/store.ts
index cd9a18c..7f1a86e 100644
--- a/src/frontend/src/store.ts
+++ b/src/frontend/src/store.ts
@@ -372,7 +372,7 @@ export const useStore = create<AppStore>((set, get) => ({
 
   // v2.6: 多项目
   projects: {},
-  selectedProjectId: null,
+  selectedProjectId: (() => { try { const v = localStorage.getItem('selectedProjectId'); return v !== null ? v : ''; } catch { return ''; } })(),
 
   // v2.6: 原生 V2Task
   v2tasks: [],
@@ -507,13 +507,18 @@ export const useStore = create<AppStore>((set, get) => ({
       // 同步项目列表
       const projects = (data.syncStatus as any)?.projects?.projects || {};
       set({ projects });
-      // 自动选择第一个项目
+      // 自动选择：仅在 localStorage 无记录时
       const s = get();
-      if (!s.selectedProjectId && s.selectedProjectId !== '' && s.selectedProjectId !== '_general' && Object.keys(projects).length > 0) {
-        const realPids = Object.keys(projects).filter(p => !p.startsWith('_'));
-        const firstPid = realPids[0] || Object.keys(projects)[0];
+      const savedPid = localStorage.getItem('selectedProjectId');
+      if (savedPid === null && Object.keys(projects).length > 0) {
+        const realPids = Object.keys(projects).filter((p: string) => !p.startsWith('_'));
+        const firstPid = realPids[0] || Object.keys(projects)[0] || '';
         set({ selectedProjectId: firstPid });
         setApiProjectId(firstPid);
+        try { localStorage.setItem('selectedProjectId', firstPid); } catch {}
+      } else if (savedPid !== null && s.selectedProjectId !== savedPid) {
+        set({ selectedProjectId: savedPid });
+        setApiProjectId(savedPid);
       }
       // Also preload officials for monitor tab
       if (!s.officialsData) {