feat(ops): v4.0.2 活动图模板、合伙人选择持久化与用户管理主图

HQ 上传底图与码栏；合伙人单选写入 partner_account.activity_poster_id，用户管理下次登录仍显示同一张图。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/h5-partner/src/PartnerAppRoutes.tsx

@@ -25,6 +25,7 @@ import LeaderboardPage from './pages/LeaderboardPage';
 import UsersManagePage from './pages/UsersManagePage';
 import AssocOrdersPage from './pages/AssocOrdersPage';
 import CommissionOrdersPage from './pages/CommissionOrdersPage';
+import ActivityPostersPage from './pages/ActivityPostersPage';
 
 function PrimaryRoutes() {
   return (
@@ -41,6 +42,7 @@ function PrimaryRoutes() {
       <Route path="/center/settlement" element={<SettlementPage />} />
       <Route path="/center/staff" element={<StaffListPage />} />
       <Route path="/center/staff/new" element={<StaffCreatePage />} />
+      <Route path="/center/activity-posters" element={<ActivityPostersPage />} />
       <Route path="/center/assoc" element={<Navigate to="/users" replace />} />
       <Route path="/center/assoc/users" element={<Navigate to="/users" replace />} />
       <Route path="/users/orders" element={<AssocOrdersPage />} />