feat: 从黄果 NET hgdjnet-server 9bfbafe 导入 HKDJ 官网后端

来源：hgdjnet-server 9bfbafe10d417deea959bd53117bc88a10e60a83
项目身份 HKDJ / JHA-216，独立官网仓库，Jenkins 守卫键 hkdjnet
测试目录 /server/hkdj_net，App/Web API 30331/30332

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/api/web_coin/cointrans.go

@@ -0,0 +1,40 @@
+package web_coin
+
+import (
+	"hkdj-web-server/pub/common"
+	"hkdj-web-server/pub/common/srvdef"
+	"hkdj-web-server/web/service/srv_cointrans"
+
+	"github.com/gin-gonic/gin"
+)
+
+// @Tags 金币管理
+// @Summary 查询金币交易记录
+// @Description 分页查询金币收支流水，支持按用户、收支方向、交易类型、时间范围筛选
+// @Accept json
+// @Produce json
+// @Param param body srv_cointrans.CoinTransReq true "查询参数"
+// @Success 200 {object} srv_cointrans.CoinTransResp "成功"
+// @Failure 400 {string} string "参数错误"
+// @Security ApiKeyAuth
+// @Router /api/web/coin/trans [POST]
+func GetCoinTrans(ctx *gin.Context) {
+	var req srv_cointrans.CoinTransReq
+	if err := ctx.ShouldBindJSON(&req); err != nil {
+		common.ServerJSON(ctx, srvdef.ErrParamError, nil)
+		return
+	}
+	if req.PageNum < 1 {
+		req.PageNum = 1
+	}
+	if req.PageSize < 1 || req.PageSize > 100 {
+		req.PageSize = 20
+	}
+
+	resp, serr := srv_cointrans.GetCoinTrans(ctx, &req)
+	if serr != nil {
+		common.ServerJSON(ctx, serr.Code, serr.Tips)
+		return
+	}
+	common.ServerJSON(ctx, srvdef.Success, resp)
+}