fix(department): wait for auto-role redirect before department test

When user has exactly 1 active role, chooseRole auto-selects it and
enqueues a router.push to the landing page. loginAndDismissSelectors
now waits for this SPA redirect to complete, so the route guard's
org/department loading runs before page.goto('/clazz') does a full
reload. Also adds extra retry for department loading as fallback.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/department-single-transparent.spec.ts

@@ -51,7 +51,23 @@ async function loginAndDismissSelectors(page: any) {
         console.log('[DeptTest]   clicked role');
         await page.waitForTimeout(3_000);
       } else {
-        console.log('[DeptTest]   at / but no role selector, break');
+        console.log('[DeptTest]   at / but no role selector');
+        // 无角色选择器 → 当前用户角色已自动选中（1个活跃角色）。
+        // chooseRole 内部调用 router.push('/role/profile') 是异步的，
+        // 等待重定向完成，让该 navigtion 的 route guard 走完 org/dept 加载。
+        // 避免后续 page.goto 的完整页面加载冲掉未完成的 SPA 导航。
+        try {
+          await page.waitForFunction(
+            () => window.location.pathname !== '/',
+            { timeout: 10_000 }
+          );
+          const newPath = await page.evaluate(() => window.location.pathname);
+          console.log('[DeptTest]   role auto-redirected to', newPath);
+          // route guard 已在这个导航中完成 org/dept 加载，CurrentDepartmentId 已写入
+        } catch {
+          // 10s 内未重定向（可能没有活跃角色），不做处理
+          console.log('[DeptTest]   no redirect within 10s (0 roles?)');
+        }
         break;
       }
     } else {
@@ -118,6 +134,20 @@ test.describe('单部门透明', () => {
     });
     console.log('[DeptTest] state after goto:', JSON.stringify(pageState, null, 2));
 
+    console.log('[DeptTest] deptId after goto:', pageState.CurrentDepartmentId);
+
+    // 如果部门尚未设置，给 route guard 额外时间完成异步加载
+    if (!pageState.CurrentDepartmentId) {
+      console.log('[DeptTest] waiting extra for department loading...');
+      await page.waitForTimeout(8_000);
+      const retry = await page.evaluate(() => window.localStorage.getItem('CurrentDepartmentId'));
+      console.log('[DeptTest] CurrentDepartmentId after extra wait:', retry);
+      if (retry) {
+        pageState.CurrentDepartmentId = retry;
+        pageState.pathname = await page.evaluate(() => window.location.pathname);
+      }
+    }
+
     // 验证 localStorage 写入了 CurrentDepartmentId
     const deptId = pageState.CurrentDepartmentId;
     expect(deptId).toBeTruthy();