feat(api): 支持按creator参数过滤经销商列表

- 新增creator参数解析，支持按多个creator过滤
- 根据传入creator构建SQL查询条件及参数绑定
- 当creator参数为空时，返回空列表避免无效查询
- 保持原有按q参数模糊搜索功能不变
- 限制默认返回记录数为2000，增强接口性能

server/internal/api/resellers.go

@@ -24,6 +24,7 @@ func ResellersHandler(resellerDB *sql.DB) http.Handler {
 }
 
 func (a *ResellersAPI) list(w http.ResponseWriter, r *http.Request) {
+	creatorsParam := r.URL.Query().Get("creator")
 	q := r.URL.Query().Get("q")
 	limitStr := r.URL.Query().Get("limit")
 	limit := 2000
@@ -32,9 +33,24 @@ func (a *ResellersAPI) list(w http.ResponseWriter, r *http.Request) {
 			limit = n
 		}
 	}
-
-	sql1 := "SELECT id, COALESCE(name,'') AS name FROM reseller WHERE 1=1"
+	creators := []string{}
+	for _, s := range strings.Split(creatorsParam, ",") {
+		s = strings.TrimSpace(s)
+		if s != "" {
+			creators = append(creators, s)
+		}
+	}
+	if len(creators) == 0 {
+		ok(w, r, []map[string]interface{}{})
+		return
+	}
+	ph := strings.Repeat("?,", len(creators))
+	ph = strings.TrimSuffix(ph, ",")
+	sql1 := "SELECT id, COALESCE(name,'') AS name FROM reseller WHERE creator IN (" + ph + ")"
 	args := []interface{}{}
+	for _, c := range creators {
+		args = append(args, c)
+	}
 	if q != "" {
 		sql1 += " AND (CAST(id AS CHAR) LIKE ? OR name LIKE ?)"
 		like := "%" + q + "%"