test: update and add E2E, integration, visual, and webapp tests

- Update E2E tests: announcements, auth, auth-business-flow, full-route-regression, grades, navigation, smoke-auth, teacher-web-test

- Update integration tests: api-ai-chat, api-onboarding-complete, api-onboarding-status, proxy-guard, integration setup

- Update visual regression tests: admin-dashboard, homepage, student-dashboard, teacher-dashboard, visual config, helpers

- Update webapp tests: admin, parent, student full tests and debug scripts

- Add new webapp tests: announcements_messages, settings_profile, debug scripts

- Add webtest directory with test plans, screenshots, and diagnostic scripts

webtest/diag4_lesson.py

@@ -0,0 +1,47 @@
+"""获取完整的 500 错误信息"""
+import re
+from playwright.sync_api import sync_playwright
+
+BASE_URL = "http://localhost:3000"
+
+with sync_playwright() as p:
+    browser = p.chromium.launch(headless=True)
+    context = browser.new_context()
+    page = context.new_page()
+
+    # 登录教师账号
+    print(">>> 登录教师账号...")
+    page.goto(f"{BASE_URL}/login", timeout=30000)
+    page.wait_for_load_state("networkidle", timeout=15000)
+
+    page.locator('input[name="email"]').fill("t_chinese_1@xiaoxue.edu.cn")
+    page.locator('input[name="password"]').fill("123456")
+    page.get_by_role("button", name=re.compile(r"Sign In with Email", re.I)).click()
+
+    page.wait_for_load_state("networkidle", timeout=20000)
+    page.wait_for_timeout(2000)
+    print(f"登录后 URL: {page.url}")
+
+    # 访问备课列表页
+    print("\n>>> 访问 /teacher/lesson-plans...")
+    response = page.goto(f"{BASE_URL}/teacher/lesson-plans", timeout=30000)
+    print(f"HTTP 状态: {response.status if response else 'None'}")
+
+    if response and response.status >= 400:
+        body = response.text()
+        # 找到所有 data-next-error-message 属性
+        error_messages = re.findall(r'data-next-error-message="([^"]+)"', body)
+        print(f"\n=== 错误消息 ({len(error_messages)} 条) ===")
+        for msg in error_messages:
+            # 解码 HTML 实体
+            msg = msg.replace("&lt;", "<").replace("&gt;", ">").replace("&quot;", '"').replace("&#x27;", "'").replace("&amp;", "&")
+            print(f"\n{msg}")
+
+        # 也查找 error 属性
+        error_codes = re.findall(r'data-next-error-code="([^"]+)"', body)
+        if error_codes:
+            print(f"\n=== 错误代码 ===")
+            for code in error_codes:
+                print(f"  {code}")
+
+    browser.close()