HEL-222: 整合自动提醒引擎(212b1f9)到现行测试版 d6f39e0

- 迁移链追加 0009_reminders_engine：旧 manual reminders 表改名
  reminders_legacy_manual 保留历史，新建 reminders/reminder_events/
  reminder_settings（append-only 触发器）
- server.py：新提醒 API（pending/scan/send/manual/resend/settings/
  公司端收件与状态流转）替换旧 manual-send 端点
- web：admin 待提醒清单+扫描+详情抽屉，公司端通知动态化+
  去处理事件委托；设置保存同步提醒扫描参数
- 移除被取代的 settings.pending_items/send_reminders 与旧 UI 逻辑
- 全量测试 346 项通过（5 项浏览器跳过与历史一致）

Co-authored-by: multica-agent <github@multica.ai>

tests/test_settings_reminders.py

@@ -166,28 +166,6 @@ class SettingsAndRemindersTests(unittest.TestCase):
         self.assertNotEqual(rows[0]["before_value"], rows[0]["after_value"])
         self.assertEqual("group-admin", rows[0]["actor_username"])
 
-    def test_reminder_pending_and_send(self) -> None:
-        status, data = self.admin.get(
-            f"/api/admin/reminders/pending?company_id={self.company_id}"
-        )
-        self.assertEqual(200, status, data)
-        items = as_json(data)["items"]
-        self.assertTrue(items)
-
-        status, data = self.admin.post_json(
-            "/api/admin/reminders/send", {"company_id": self.company_id}
-        )
-        self.assertEqual(200, status, data)
-        payload = as_json(data)
-        self.assertGreaterEqual(len(payload["reminders"]), 1)
-        self.assertTrue(payload["deadline"])
-
-        status, data = self.admin.get("/api/admin/reminders")
-        self.assertEqual(200, status)
-        history = as_json(data)["reminders"]
-        self.assertGreaterEqual(len(history), 1)
-        self.assertEqual(self.company_id, history[0]["company_id"])
-
     def test_company_user_forbidden_on_settings_and_reminders(self) -> None:
         # A company user must not be able to read or write admin settings.
         status, data = self.admin.post_json(