fix: 修复管理员更新用户信息时意外覆盖字段的问题

- Enable/IsAdmin/OnlyFirstPurchase 改为 *bool，未传时不更新
- Avatar/Remark/ReferCode/ReferralPercentage 加空值保护
- getDeviceList: 恢复 hifastday@hifast.com 家庭成员受限逻辑

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/logic/admin/user/updateUserBasicInfoLogic.go

@@ -119,14 +119,28 @@ func (l *UpdateUserBasicInfoLogic) UpdateUserBasicInfo(req *types.UpdateUserBasi
 			}
 			userInfo.Commission = req.Commission
 		}
-		userInfo.Avatar = req.Avatar
-		userInfo.ReferCode = req.ReferCode
+		if req.Avatar != "" {
+			userInfo.Avatar = req.Avatar
+		}
+		if req.ReferCode != "" {
+			userInfo.ReferCode = req.ReferCode
+		}
 		userInfo.RefererId = req.RefererId
-		userInfo.Enable = &req.Enable
-		userInfo.IsAdmin = &req.IsAdmin
-		userInfo.Remark = req.Remark
-		userInfo.OnlyFirstPurchase = &req.OnlyFirstPurchase
-		userInfo.ReferralPercentage = req.ReferralPercentage
+		if req.Enable != nil {
+			userInfo.Enable = req.Enable
+		}
+		if req.IsAdmin != nil {
+			userInfo.IsAdmin = req.IsAdmin
+		}
+		if req.Remark != "" {
+			userInfo.Remark = req.Remark
+		}
+		if req.OnlyFirstPurchase != nil {
+			userInfo.OnlyFirstPurchase = req.OnlyFirstPurchase
+		}
+		if req.ReferralPercentage != 0 {
+			userInfo.ReferralPercentage = req.ReferralPercentage
+		}
 
 		if req.Password != "" {
 			if userInfo.Id == 2 && isDemo {