修复 bug，优化界面

dashboard/docker-compose.yml

@@ -26,7 +26,8 @@ services:
       - "host.docker.internal:host-gateway"
     volumes:
       - /data/projects/source:/data/projects/source
-      # 素材库上传目录：容器内 /app/uploads ↔ 宿主机 /data/project/dashboard/backend/uploads
+      # 素材库上传目录：容器内 /app/uploads ↔ 宿主机 /data/project/dashboard/frontend/dist/uploads
+      # （与 frontend nginx 静态直出同一目录；若该目录被删除重建，需 force-recreate backend 重新挂载）
       - /data/project/dashboard/frontend/dist/uploads:/app/uploads
 
   frontend: