feat: 修改终端背景图片的存储路径更新为data文件夹

Related to #36

packages/backend/src/appearance/appearance.controller.ts

@@ -9,7 +9,7 @@ import fsp from 'fs/promises'; // Use fs.promises for async file operations
 // --- 背景图片上传配置 (保持不变) ---
 const backgroundStorage = multer.diskStorage({
     destination: (req, file, cb) => {
-        const uploadPath = path.join(__dirname, '../../uploads/backgrounds/');
+        const uploadPath = path.join(__dirname, '../../data/background/');
         // 确保目录存在
         fs.mkdirSync(uploadPath, { recursive: true });
         cb(null, uploadPath);
@@ -134,7 +134,7 @@ export const getBackgroundFileController = async (req: Request, res: Response):
 
     try {
         // 构建文件的绝对路径 (基于 multer 的保存位置)
-        const absolutePath = path.join(__dirname, '../../uploads/backgrounds/', filename);
+        const absolutePath = path.join(__dirname, '../../data/background/', filename);
 
         // 检查文件是否存在且可读
         await fsp.access(absolutePath, fs.constants.R_OK);