feat: 退出登录后跳转首页(/)而非登录页(/login)

- useLogout hook: navigate('/login') → navigate('/')
- client.ts 无refresh_token自动登出: href='/login' → href='/'
- client.ts 刷新失败自动登出: href='/login' → href='/'
- 已排查所有退出入口：仅Header头像菜单有手动退出按钮，行为一致
- ProtectedRoute未登录拦截仍跳/login（正确行为，非退出场景）

apps/web/src/api/client.ts

@@ -69,7 +69,7 @@ apiClient.interceptors.response.use(
       // 无 refresh_token → 直接登出
       if (!refreshToken) {
         useAuthStore.getState().clearAuth();
-        window.location.href = "/login";
+        window.location.href = "/";
         return Promise.reject(error);
       }
 
@@ -114,7 +114,7 @@ apiClient.interceptors.response.use(
         // 刷新失败 → 登出
         processQueue(refreshError, null);
         useAuthStore.getState().clearAuth();
-        window.location.href = "/login";
+        window.location.href = "/";
         return Promise.reject(refreshError);
       } finally {
         isRefreshing = false;

apps/web/src/hooks/useAuth.ts

@@ -75,7 +75,7 @@ export const useLogout = () => {
     } finally {
       clearAuth();
       queryClient.clear();
-      navigate("/login");
+      navigate("/");
     }
   };