HEL-269: 完成月结锁账、撤演示数据与代码收尾

锁账后写保护与闭期补录留痕；重开须审批并按版本链再结；列表/导出改走真实 API。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

tests/test_reminders_page.py

@@ -37,8 +37,8 @@ class RemindersPageSourceContractTests(unittest.TestCase):
         self.assertIn('id="reminder-tbody"', html)
         self.assertIn('id="reminder-tabs"', html)
         self.assertIn('id="reminder-detail-drawer"', html)
-        self.assertIn("design-system.css?v=9", html)
-        self.assertIn("app.js?v=14", html)
+        self.assertIn("design-system.css?v=10", html)
+        self.assertIn("app.js?v=15", html)
         pending = html.index('id="pending-reminders-card"')
         history = html.index('id="reminder-history-card"')
         send = html.index('id="send-reminder-card"')
@@ -115,7 +115,7 @@ class RemindersPageLayoutSmokeTests(unittest.TestCase):
         html = (WEB / "admin.html").read_text(encoding="utf-8")
         page.set_viewport_size({"width": width, "height": 900})
         page.set_content(
-            html.replace('src="app.js?v=14"', 'src=""'),
+            html.replace('src="app.js?v=15"', 'src=""'),
             base_url=self.base,
         )
         page.evaluate(
@@ -138,7 +138,7 @@ class RemindersPageLayoutSmokeTests(unittest.TestCase):
 
     def test_send_flow_columns_and_no_page_overflow(self) -> None:
         html = (WEB / "admin.html").read_text(encoding="utf-8")
-        self.assertIn("app.js?v=14", html)
+        self.assertIn("app.js?v=15", html)
         with sync_playwright() as p:
             browser = p.chromium.launch()
             page = browser.new_page()