refactor(router): 优化错误页面路由跳转逻辑

src/layouts/components/LayoutToolbar.vue

@@ -160,7 +160,9 @@ function logout() {
     lockScroll: false,
   }).then(() => {
     userStore.logout().then(() => {
-      router.push(`/login?redirect=${route.fullPath}`);
+      // 若当前已在 404/401 等错误页，退出后不再跳回错误页
+      const redirect = ["/404", "/401"].includes(route.path) ? "/" : route.fullPath;
+      router.push(`/login?redirect=${encodeURIComponent(redirect)}`);
     });
   });
 }

src/router/guards/permission.ts

@@ -56,6 +56,10 @@ export function setupPermissionGuard() {
 
       // 路由 404 检查
       if (to.matched.length === 0) {
+        // 从登录页跳转且目标路径无效，回退首页（避免不同用户权限不同导致的 404）
+        if (_from.path === "/login") {
+          return { path: "/", replace: true };
+        }
         return "/404";
       }