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_persistence.py

@@ -41,7 +41,7 @@ class PersistenceTestCase(unittest.TestCase):
 class MigrationTests(PersistenceTestCase):
     def test_migrate_creates_schema_and_is_idempotent(self) -> None:
         first = applied_versions(self.connection)
-        self.assertEqual([1, 2, 3, 4, 5, 6, 7, 8], first)
+        self.assertEqual([1, 2, 3, 4, 5, 6, 7, 8, 9], first)
         self.assertEqual([], migrate(self.connection))
         self.assertEqual(first, applied_versions(self.connection))
         tables = {
@@ -84,24 +84,24 @@ class MigrationTests(PersistenceTestCase):
             "ledger_subject_suggestions",
             "system_settings",
             "system_setting_changes",
-            "reminders",
             "closed_periods",
             "opening_balance_revisions",
             "coverage_gaps",
             "no_business_attestations",
+            "reminders_legacy_manual",
             "schema_migrations",
         ):
             self.assertIn(table, tables)
 
     def test_rollback_removes_schema_and_forward_rebuilds_it(self) -> None:
-        self.assertEqual([8, 7, 6, 5, 4, 3, 2, 1], rollback(self.connection, 0))
+        self.assertEqual([9, 8, 7, 6, 5, 4, 3, 2, 1], rollback(self.connection, 0))
         self.assertEqual([], applied_versions(self.connection))
         remaining = self.connection.execute(
             "SELECT name FROM sqlite_master WHERE type = 'table' AND name = 'source_rows'"
         ).fetchone()
         self.assertIsNone(remaining)
-        self.assertEqual([1, 2, 3, 4, 5, 6, 7, 8], migrate(self.connection))
-        self.assertEqual([1, 2, 3, 4, 5, 6, 7, 8], applied_versions(self.connection))
+        self.assertEqual([1, 2, 3, 4, 5, 6, 7, 8, 9], migrate(self.connection))
+        self.assertEqual([1, 2, 3, 4, 5, 6, 7, 8, 9], applied_versions(self.connection))
 
     def test_rollback_to_4_keeps_bank_evidence_and_drops_event_layer(self) -> None:
         self.import_sample()
@@ -109,7 +109,7 @@ class MigrationTests(PersistenceTestCase):
             "SELECT COUNT(*) AS n FROM source_rows"
         ).fetchone()["n"]
         self.assertGreater(row_count, 0)
-        self.assertEqual([8, 7, 6, 5], rollback(self.connection, 4))
+        self.assertEqual([9, 8, 7, 6, 5], rollback(self.connection, 4))
         # The pre-migration evidence and schema are untouched.
         self.assertEqual(
             row_count,