fix(mini-user): address review blockers

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/mini-user/src/lib/auth-nav.ts

@@ -7,6 +7,14 @@ const TAB_PAGES = new Set([
   '/pages/mine/index',
 ]);
 
+let loginNavigationPending = false;
+
+function isLoginPageActive(): boolean {
+  const pages = Taro.getCurrentPages();
+  const current = pages[pages.length - 1] as { route?: string } | undefined;
+  return !!current?.route?.includes('pages/login/');
+}
+
 function currentPagePath(): string {
   const pages = Taro.getCurrentPages();
   const cur = pages[pages.length - 1] as
@@ -25,6 +33,7 @@ function currentPagePath(): string {
 
 /** 跳转登录页；默认带回当前页作为 return */
 export function goLogin(returnPath?: string, extras?: Record<string, string>) {
+  if (loginNavigationPending || isLoginPageActive()) return;
   const returnTo = returnPath ?? currentPagePath();
   const parts: string[] = [];
   if (returnTo) parts.push(`return=${encodeURIComponent(returnTo)}`);
@@ -34,9 +43,15 @@ export function goLogin(returnPath?: string, extras?: Record<string, string>) {
     }
   }
   const url = parts.length ? `/pages/login/index?${parts.join('&')}` : '/pages/login/index';
-  Taro.navigateTo({ url }).catch(() => {
-    Taro.redirectTo({ url });
-  });
+  loginNavigationPending = true;
+  void Taro.navigateTo({ url })
+    .catch(() => Taro.redirectTo({ url }))
+    .finally(() => {
+      // 等路由栈稳定后再释放，拦截同一轮请求触发的重复登录跳转。
+      setTimeout(() => {
+        loginNavigationPending = false;
+      }, 500);
+    });
 }
 
 /** 登录成功后回到 return 页，或回退 / 首页 */