修复: GET /v1/admin/promo/price/list 字段不匹配导致 400

前端发 rule_id/subscribe_id (均可选), 后端 API 定义为 promo_rule_id
(required), 直接返回 "PromoRuleId is a required field"。

对齐前端约定 (与 usage/list 命名一致):
- API: promo_rule_id(required) → rule_id + subscribe_id, 均可选
- model.QueryPriceList: 改为接 PriceFilter, 按条件过滤
- 同步 fake mock 与校验测试签名

internal/types/promo_validation_test.go

@@ -34,9 +34,9 @@ func TestPromoListPageSizeLimit(t *testing.T) {
 		{
 			name: "price list",
 			req: GetPromoPriceListRequest{
-				PromoRuleId: 1,
-				Page:        1,
-				Size:        201,
+				RuleId: 1,
+				Page:   1,
+				Size:   201,
 			},
 		},
 		{

internal/types/types.go

@@ -1436,9 +1436,10 @@ type GetPreSendEmailCountResponse struct {
 }
 
 type GetPromoPriceListRequest struct {
-	PromoRuleId int64 `form:"promo_rule_id" validate:"required,gt=0"`
 	Page        int64 `form:"page" validate:"required,gt=0"`
 	Size        int64 `form:"size" validate:"required,gt=0,lte=200"`
+	RuleId      int64 `form:"rule_id,omitempty"`
+	SubscribeId int64 `form:"subscribe_id,omitempty"`
 }
 
 type GetPromoPriceListResponse struct {