refactor: unify code formatting and improve push/search implementations

- Remove BOM from all Go source files
- Standardize import ordering and whitespace across handlers and services
- Replace PostgreSQL full-text search with ILIKE pattern matching in post and user repositories
- Enhance JPush client with TLS transport, rate limit monitoring, and simplified API
- Refactor PushService to include userID in device management methods
- Add MaxDevicesPerUser limit and extract helper functions for push payload construction

internal/service/trade_service.go

@@ -219,4 +219,4 @@ func (s *tradeService) Unfavorite(ctx context.Context, userID string, id string)
 	}
 	_ = s.tradeRepo.DecrementFavorites(ctx, id)
 	return nil
-}
+}