已完成用户APP首期功能开发

交付用户端首期页面、配套接口、后台资源及测试文档。用户APP构建、静态分析和三个管理后台构建通过；完整测试仍有2项失败，后端模型注释检查未通过，详见交付记录。

backend/api/internal/logic/payment/callback.go

@@ -105,7 +105,10 @@ func complete(paymentNo, tradeNo string, amount int64, channel, callbackDigest s
 			result := tx.Model(&models.EcOrder{}).Where("identity = ? AND order_status = ?", order.BusinessIdentity, 16).Updates(map[string]any{"order_status": 18, "paid_at": &now})
 			return requireSingleBusinessUpdate(result)
 		case "gasorder":
-			return requireSingleBusinessUpdate(tx.Model(&models.GasorderBasic{}).Where("identity = ? AND order_status IN ?", order.BusinessIdentity, []int{16, 18}).Update("order_status", 35))
+			if err := requireSingleBusinessUpdate(tx.Model(&models.GasorderBasic{}).Where("identity = ? AND order_status IN ?", order.BusinessIdentity, []int{16, 18}).Update("order_status", 35)); err != nil {
+				return err
+			}
+			return CompleteGasDeposits(tx, order.BusinessIdentity, now)
 		case "recharge":
 			return completeRecharge(tx, order, now)
 		}