fix: 优化路由守卫逻辑，确保从登录页面重定向到首页

src/router/guard.ts

@@ -4,6 +4,9 @@ export function createRouterGuard(router: Router) {
   router.beforeEach(async (to, from, next) => {
     const userStore = useUserStore();
     if (to.meta.requiresAuth && !userStore.isAuthenticated) {
+      if (from.path === "/auth/login") {
+        return next("/");
+      }
       const redirect = encodeURIComponent(to.fullPath);
       return next({ path: "/auth/login", query: { redirect } });
     }