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.

frontend/lib/registry/components/v2-split-panel-layout/SplitPanelLayoutComponent.tsx

@@ -20,6 +20,7 @@ import {
   Trash2,
   Settings,
   Move,
+  FileSpreadsheet,
 } from "lucide-react";
 import { dataApi } from "@/lib/api/data";
 import { entityJoinApi } from "@/lib/api/entityJoin";
@@ -43,6 +44,7 @@ import { useSplitPanel } from "./SplitPanelContext";
 import { DynamicComponentRenderer } from "@/lib/registry/DynamicComponentRenderer";
 import { PanelInlineComponent } from "./types";
 import { cn } from "@/lib/utils";
+import { BomExcelUploadModal } from "../v2-bom-tree/BomExcelUploadModal";
 
 export interface SplitPanelLayoutComponentProps extends ComponentRendererProps {
   // 추가 props
@@ -500,6 +502,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
   const [showAddModal, setShowAddModal] = useState(false);
   const [addModalPanel, setAddModalPanel] = useState<"left" | "right" | "left-item" | null>(null);
   const [addModalFormData, setAddModalFormData] = useState<Record<string, any>>({});
+  const [bomExcelUploadOpen, setBomExcelUploadOpen] = useState(false);
 
   // 수정 모달 상태
   const [showEditModal, setShowEditModal] = useState(false);
@@ -3010,12 +3013,20 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
               <CardTitle className="text-base font-semibold">
                 {componentConfig.leftPanel?.title || "좌측 패널"}
               </CardTitle>
-              {!isDesignMode && componentConfig.leftPanel?.showAdd && (
-                <Button size="sm" variant="outline" onClick={() => handleAddClick("left")}>
-                  <Plus className="mr-1 h-4 w-4" />
-                  추가
-                </Button>
-              )}
+              <div className="flex items-center gap-1">
+                {!isDesignMode && (componentConfig.leftPanel as any)?.showBomExcelUpload && (
+                  <Button size="sm" variant="outline" onClick={() => setBomExcelUploadOpen(true)}>
+                    <FileSpreadsheet className="mr-1 h-4 w-4" />
+                    엑셀
+                  </Button>
+                )}
+                {!isDesignMode && componentConfig.leftPanel?.showAdd && (
+                  <Button size="sm" variant="outline" onClick={() => handleAddClick("left")}>
+                    <Plus className="mr-1 h-4 w-4" />
+                    추가
+                  </Button>
+                )}
+              </div>
             </div>
           </CardHeader>
           {componentConfig.leftPanel?.showSearch && (
@@ -5070,6 +5081,16 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
           </DialogFooter>
         </DialogContent>
       </Dialog>
+
+      {(componentConfig.leftPanel as any)?.showBomExcelUpload && (
+        <BomExcelUploadModal
+          open={bomExcelUploadOpen}
+          onOpenChange={setBomExcelUploadOpen}
+          onSuccess={() => {
+            loadLeftData();
+          }}
+        />
+      )}
     </div>
   );
 };