fix(clazz-dual-view): use index-based role selection with org-select loop

Replace text-based filter that failed to find teacher role button with
the original index-based approach (nth(2)), wrapped in an org-select
handling loop matching the supervisor-features pattern.

Also adds test.setTimeout(240_000) for CI environment slowness and
documents authcore as public repo in CLAUDE.md.

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

CLAUDE.md

@@ -37,6 +37,11 @@
 
 SSH 连接服务器（部署用）：`ssh -i ~/.ssh/id_rsa.moicen weli@101.43.244.164`
 
+## 仓库迁移注意
+
+- `authcore`（Firebase Auth Core）是**公开仓库**，不要托管到自托管 Gitea
+- huike-e2e-moicen、huike-front、huike-back、resty_functions 这 4 个仓库需要统一管理 GitHub ↔ Gitea 同步
+
 ## 工具链
 
 - 文本检索：`rg`（ripgrep）

tests/clazz-dual-view.spec.ts

@@ -9,8 +9,8 @@ async function loginAsTeacher(page: any) {
   await expect(page.locator('#app')).toBeVisible({ timeout: 60_000 });
 
   // 逐层处理选择页：机构选择 → 角色选择（可能有 0~n 层）
-  const teacherRoleText = '教师';
-  for (let i = 0; i < 5; i++) {
+  let roleSelected = false;
+  for (let i = 0; i < 5 && !roleSelected; i++) {
     const path = await page.evaluate(() => window.location.pathname);
 
     if (path === '/org/select') {
@@ -20,11 +20,17 @@ async function loginAsTeacher(page: any) {
       const rs = page.getByText('请选择您的登录身份');
       try {
         await rs.waitFor({ state: 'visible', timeout: 10_000 });
-        await page.locator('.van-grid-item').filter({ hasText: teacherRoleText }).click();
+        const items = page.locator('.van-grid-item');
+        const count = await items.count();
+        if (count >= 3) {
+          await items.nth(2).click(); // TEACHER role
+        } else {
+          await items.first().click();
+        }
         await page.waitForTimeout(3_000);
-        return;
+        roleSelected = true;
       } catch {
-        // 无角色选择器 → 角色已自动选中，继续
+        // 无角色选择器 → 角色已自动选中
         break;
       }
     } else {