feat(distribution): 分站品牌装修可配置首页入口并上传图片

分站可单独配置回收、合作反馈和客服二维码，未配置时继承主站；Logo、图标和轮播支持直接上传。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/internal/modules/systemconfig/handler.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"hfb_sys/backend/internal/middleware"
+	"hfb_sys/backend/internal/sitecode"
 	"hfb_sys/backend/pkg/response"
 
 	"github.com/gin-gonic/gin"
@@ -82,7 +83,7 @@ func (h *Handler) HomeAnnouncements(c *gin.Context) {
 }
 
 func (h *Handler) HomeConfig(c *gin.Context) {
-	config, err := h.service.HomeConfig(c.Request.Context())
+	config, err := h.service.HomeConfig(c.Request.Context(), sitecode.FromRequest(c))
 	if err != nil {
 		writeConfigError(c, err)
 		return