Enable searching topup records by trade_no across both admin-wide and user-only views.
Frontend
- TopupHistoryModal.jsx:
- Add search input with prefix icon (IconSearch) to filter by order number
- Send `keyword` query param to backend; works with both endpoints:
- Admin: GET /api/user/topup?p=1&page_size=10&keyword=...
- User: GET /api/user/topup/self?p=1&page_size=10&keyword=...
- Keep endpoint auto-switching based on role (isAdmin)
- Minor UI polish: outlined admin action button; keep Coins icon for amount
Backend
- model/topup.go:
- Add SearchUserTopUps(userId, keyword, pageInfo)
- Add SearchAllTopUps(keyword, pageInfo)
- Both support pagination and `trade_no LIKE %keyword%` filtering (ordered by id desc)
- controller/topup.go:
- GetUserTopUps / GetAllTopUps accept optional `keyword` and route to search functions when present
Routes
- No new endpoints; search is enabled via `keyword` on existing:
- GET /api/user/topup
- GET /api/user/topup/self
Affected files
- model/topup.go
- controller/topup.go
- web/src/components/topup/modals/TopupHistoryModal.jsx
