refactor(navigation): consolidate navigation with href helpers and extract push device hook

- Migrate all navigation calls from magic strings to centralized href helpers
- Extract inline device registration logic into useRegisterPushDevice hook
- Remove unused terms and privacy policy routes from profile stack
- Add hrefTradeDetail helper for trade detail navigation
- Restore routePayloadCache.stashSystemMessage for group request/invite handling
- Change desktop shell tab navigation from replace to push

src/screens/message/NotificationsScreen.tsx

@@ -38,7 +38,7 @@ import { SystemMessageItem } from '../../components/business';
 import { Text, ResponsiveContainer, AppBackButton } from '../../components/common';
 import { useCursorPagination } from '../../hooks/useCursorPagination';
 import * as hrefs from '../../navigation/hrefs';
-import { useMessageManagerSystemUnreadCount } from '../../stores';
+import { useMessageManagerSystemUnreadCount, routePayloadCache } from '../../stores';
 import { messageManager } from '../../stores/message';
 
 const MESSAGE_TYPES = [
@@ -331,8 +331,10 @@ export const NotificationsScreen: React.FC<{ onBack?: () => void }> = ({ onBack
           router.push(hrefs.hrefUserProfile(extra_data.actor_id_str));
         }
       } else if (system_type === 'group_join_apply') {
+        routePayloadCache.stashSystemMessage(message);
         router.push(hrefs.hrefGroupRequestDetail(message));
       } else if (system_type === 'group_invite') {
+        routePayloadCache.stashSystemMessage(message);
         router.push(hrefs.hrefGroupInviteDetail(message));
       }
       // 其他类型暂不处理跳转