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>

app/api/uploadapi/upload.go

@@ -0,0 +1,49 @@
+package uploadapi
+
+import (
+	"net/http"
+
+	"hkdj-web-server/app/service/uploadser"
+	"hkdj-web-server/pub/common"
+	"hkdj-web-server/pub/common/log"
+	"hkdj-web-server/pub/common/srvdef"
+
+	"github.com/gin-gonic/gin"
+)
+
+// UploadImage 上传图片
+// @Tags 上传
+// @Summary 图片上传
+// @Description 将图片转发至存储服务 /media/web/autopublish/image
+// @Accept multipart/form-data
+// @Produce json
+// @Param file formData file true "图片文件"
+// @Param watermark formData string false "是否加水印：1加，其他情况不加（头像不加）"
+// @Success 200 {object} uploadser.ImageUploadResp "成功"
+// @Failure 400 {string} string "参数错误"
+// @Router /api/app/upload/image [post]
+func UploadImage(ctx *gin.Context) {
+	f, err := ctx.FormFile("file")
+	if err != nil {
+		common.ServerJSON(ctx, srvdef.ErrParamError, "file 不能为空")
+		return
+	}
+
+	watermark := int64(0)
+	if ctx.PostForm("watermark") == "1" {
+		watermark = 1
+	}
+
+	param := &uploadser.ImageParam{
+		FileHeader: f,
+		Watermark:  watermark,
+	}
+	respBytes, err := uploadser.ForwardImage(param)
+	if err != nil {
+		log.Error("UploadImage forward failed", log.E(err))
+		common.ServerJSON(ctx, srvdef.ServerError, nil)
+		return
+	}
+
+	ctx.Data(http.StatusOK, "application/json; charset=utf-8", respBytes)
+}