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/hooks/index.ts

@@ -70,6 +70,9 @@ export { useMediaCache } from './useMediaCache';
 
 export type { UseMediaCacheReturn } from './useMediaCache';
 
+// ==================== 推送设备注册 Hook ====================
+export { useRegisterPushDevice } from './useRegisterPushDevice';
+
 // ==================== 差异更新 Hooks ====================
 export { useDifferentialMessages } from './useDifferentialMessages';