feat: 权限与日志治理完善，MinIO 独立部署与 tiktoken 离线打包适配

- 后端：强化平台/审批/资源/系统接口权限校验与操作日志，更新权限设计文档与测试用例
- 存储：新增 MinIO 独立部署适配（端口 19000/19001），外部端点与 host-gateway 互通
- 离线：打包 tiktoken cl100k_base 词表进镜像，避免无网环境联网下载
- 其他：算力节点接口微调，前端微调创建页小修，忽略 MinIO 运行时数据

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

backend/app/modules/compute_gateway/client.py

@@ -266,3 +266,8 @@ class ComputeNodeClient:
             )
             response.raise_for_status()
             return _unwrap_dict(response.json())
+
+    async def upload_file_to_url(self, path: str, upload_url: str, object_key: str = "", content_type: str = "application/octet-stream") -> dict[str, Any]:
+        return await self._request("POST", "/compute/files/upload-to-url", json_data={
+            "path": path, "upload_url": upload_url, "object_key": object_key, "content_type": content_type,
+        }, timeout=900)