fix: 补全 ShopProfile 和 Post 响应中缺失的后端字段

ShopProfile 补上 allowMultiShop/allowIndependentOrders/dispatchMode，Post 补上 pinned/linkedOrderId。这些字段在 RPC proto、数据库和写入逻辑中均已存在，但 API 响应类型和映射函数遗漏了它们。同时补回 community.api 中 CreateCommentReq 的 PostId 字段定义。

desc/api/shop.api

@@ -4,18 +4,21 @@ import "common.api"
 
 type (
 	ShopProfile {
-		Id              string      `json:"id"`
-		Owner           UserProfile `json:"owner"`
-		Name            string      `json:"name"`
-		Banner          string      `json:"banner,optional"`
-		Description     string      `json:"description"`
-		Rating          string      `json:"rating"`
-		TotalOrders     int64       `json:"totalOrders"`
-		PlayerCount     int64       `json:"playerCount"`
-		CommissionType  string      `json:"commissionType"`
-		CommissionValue string      `json:"commissionValue"`
-		Announcements   []string    `json:"announcements"`
-		TemplateConfig  interface{} `json:"templateConfig"`
+		Id                     string      `json:"id"`
+		Owner                  UserProfile `json:"owner"`
+		Name                   string      `json:"name"`
+		Banner                 string      `json:"banner,optional"`
+		Description            string      `json:"description"`
+		Rating                 string      `json:"rating"`
+		TotalOrders            int64       `json:"totalOrders"`
+		PlayerCount            int64       `json:"playerCount"`
+		CommissionType         string      `json:"commissionType"`
+		CommissionValue        string      `json:"commissionValue"`
+		AllowMultiShop         bool        `json:"allowMultiShop"`
+		AllowIndependentOrders bool        `json:"allowIndependentOrders"`
+		DispatchMode           string      `json:"dispatchMode"`
+		Announcements          []string    `json:"announcements"`
+		TemplateConfig         interface{} `json:"templateConfig"`
 	}
 	ShopListResp {
 		Items []ShopProfile `json:"items"`