style:新增登录界面 完善api请求逻辑

src/pages/Layout/index.vue

@@ -49,6 +49,7 @@ defineOptions({
 });
 
 const userStore = useUserStore();
+const router = useRouter();
 
 // 响应式断点（小屏阈值，小于此值视为小屏）
 const BREAKPOINT = 1024;
@@ -158,7 +159,16 @@ const handleSideMenuSelect = (menuPath: string) => {
 
 // 初始化：默认选中第一个菜单
 onMounted(() => {
-  if (topLevelMenuList.value.length > 0) {
+  
+  const currentRoutePath = router.currentRoute.value.path;
+  const matchedTopMenu = topLevelMenuList.value.find(menu => 
+    currentRoutePath.startsWith(`${menu.path}/`) || currentRoutePath === menu.path
+  );
+  
+  if (matchedTopMenu && matchedTopMenu.path) {
+    selectedTopMenu.value = matchedTopMenu.path;
+  } else if (topLevelMenuList.value.length > 0) {
+    // 否则默认选中第一个菜单
     const firstMenu = topLevelMenuList.value[0];
     if (firstMenu && firstMenu.path) {
       selectedTopMenu.value = firstMenu.path;