feat: Implement BOM Excel upload and download functionality

- Added endpoints for uploading BOM data from Excel and downloading BOM data in Excel format.
- Developed the `createBomFromExcel` function to handle Excel uploads, including validation and error handling.
- Implemented the `downloadBomExcelData` function to retrieve BOM data for Excel downloads.
- Created a new `BomExcelUploadModal` component for the frontend to facilitate Excel file uploads.
- Updated BOM routes to include new Excel upload and download routes, enhancing BOM management capabilities.

backend-node/src/controllers/bomController.ts

@@ -143,6 +143,70 @@ export async function initializeBomVersion(req: Request, res: Response) {
   }
 }
 
+// ─── BOM 엑셀 업로드/다운로드 ─────────────────────────
+
+export async function createBomFromExcel(req: Request, res: Response) {
+  try {
+    const companyCode = (req as any).user?.companyCode || "*";
+    const userId = (req as any).user?.userName || (req as any).user?.userId || "";
+    const { rows } = req.body;
+
+    if (!rows || !Array.isArray(rows) || rows.length === 0) {
+      res.status(400).json({ success: false, message: "업로드할 데이터가 없습니다" });
+      return;
+    }
+
+    const result = await bomService.createBomFromExcel(companyCode, userId, rows);
+    if (!result.success) {
+      res.status(400).json({ success: false, message: result.errors.join(", "), data: result });
+      return;
+    }
+
+    res.json({ success: true, data: result });
+  } catch (error: any) {
+    logger.error("BOM 엑셀 업로드 실패", { error: error.message });
+    res.status(500).json({ success: false, message: error.message });
+  }
+}
+
+export async function createBomVersionFromExcel(req: Request, res: Response) {
+  try {
+    const { bomId } = req.params;
+    const companyCode = (req as any).user?.companyCode || "*";
+    const userId = (req as any).user?.userName || (req as any).user?.userId || "";
+    const { rows, versionName } = req.body;
+
+    if (!rows || !Array.isArray(rows) || rows.length === 0) {
+      res.status(400).json({ success: false, message: "업로드할 데이터가 없습니다" });
+      return;
+    }
+
+    const result = await bomService.createBomVersionFromExcel(bomId, companyCode, userId, rows, versionName);
+    if (!result.success) {
+      res.status(400).json({ success: false, message: result.errors.join(", "), data: result });
+      return;
+    }
+
+    res.json({ success: true, data: result });
+  } catch (error: any) {
+    logger.error("BOM 버전 엑셀 업로드 실패", { error: error.message });
+    res.status(500).json({ success: false, message: error.message });
+  }
+}
+
+export async function downloadBomExcelData(req: Request, res: Response) {
+  try {
+    const { bomId } = req.params;
+    const companyCode = (req as any).user?.companyCode || "*";
+
+    const data = await bomService.downloadBomExcelData(bomId, companyCode);
+    res.json({ success: true, data });
+  } catch (error: any) {
+    logger.error("BOM 엑셀 다운로드 데이터 조회 실패", { error: error.message });
+    res.status(500).json({ success: false, message: error.message });
+  }
+}
+
 export async function deleteBomVersion(req: Request, res: Response) {
   try {
     const { bomId, versionId } = req.params;