release(main): 清理示例数据并统一空态体验

frontend/src/store/auth.test.ts

@@ -39,7 +39,7 @@ describe("auth store logout", () => {
     const session = useSessionStore();
     const auth = useAuthStore();
 
-    session.lock("token_invalid", "demo@example.com", Date.now() + 60_000);
+    session.lock("token_invalid", "user@example.com", Date.now() + 60_000);
     auth.logout();
 
     expect(session.locked).toBe(false);