feat: 支持用户专属分组倍率配置

backend/internal/handler/admin/user_handler.go

@@ -45,6 +45,9 @@ type UpdateUserRequest struct {
 	Concurrency   *int     `json:"concurrency"`
 	Status        string   `json:"status" binding:"omitempty,oneof=active disabled"`
 	AllowedGroups *[]int64 `json:"allowed_groups"`
+	// GroupRates 用户专属分组倍率配置
+	// map[groupID]*rate，nil 表示删除该分组的专属倍率
+	GroupRates map[int64]*float64 `json:"group_rates"`
 }
 
 // UpdateBalanceRequest represents balance update request
@@ -183,6 +186,7 @@ func (h *UserHandler) Update(c *gin.Context) {
 		Concurrency:   req.Concurrency,
 		Status:        req.Status,
 		AllowedGroups: req.AllowedGroups,
+		GroupRates:    req.GroupRates,
 	})
 	if err != nil {
 		response.ErrorFrom(c, err)