feat: Enhance entity options retrieval with additional fields support

- Updated the `getEntityOptions` function to accept an optional `fields` parameter, allowing clients to specify additional columns to be retrieved.
- Implemented logic to dynamically include extra columns in the SQL query based on the provided `fields`, improving flexibility in data retrieval.
- Enhanced the response to indicate whether extra fields were included, facilitating better client-side handling of the data.
- Added logging for authentication failures in the `AuthGuard` component to improve debugging and user experience.
- Integrated auto-fill functionality in the `V2Select` component to automatically populate fields based on selected entity references, enhancing user interaction.
- Updated the `ItemSearchModal` to support multi-selection of items, improving usability in item management scenarios.

frontend/lib/registry/components/v2-bom-tree/BomTreeComponent.tsx

@@ -84,30 +84,45 @@ export function BomTreeComponent({
     return null;
   }, [formData, selectedRowsData]);
 
-  // 선택된 BOM 헤더 정보 추출
+  // 선택된 BOM 헤더 정보 추출 (조인 필드명 매핑 포함)
   const selectedHeaderData = useMemo(() => {
-    if (selectedRowsData && selectedRowsData.length > 0) {
-      return selectedRowsData[0] as BomHeaderInfo;
-    }
-    if (formData?.id) return formData as unknown as BomHeaderInfo;
-    return null;
+    const raw = selectedRowsData?.[0] || (formData?.id ? formData : null);
+    if (!raw) return null;
+    return {
+      ...raw,
+      item_name: raw.item_id_item_name || raw.item_name || "",
+      item_code: raw.item_id_item_number || raw.item_code || "",
+      item_type: raw.item_id_division || raw.item_id_type || raw.item_type || "",
+    } as BomHeaderInfo;
   }, [formData, selectedRowsData]);
 
   // BOM 디테일 데이터 로드
+  const detailTable = config.detailTable || "bom_detail";
+  const foreignKey = config.foreignKey || "bom_id";
+  const sourceFk = "child_item_id";
+
   const loadBomDetails = useCallback(async (bomId: string) => {
     if (!bomId) return;
     setLoading(true);
     try {
-      const result = await entityJoinApi.getTableDataWithJoins("bom_detail", {
+      const result = await entityJoinApi.getTableDataWithJoins(detailTable, {
         page: 1,
         size: 500,
-        search: { bom_id: bomId },
+        search: { [foreignKey]: bomId },
         sortBy: "seq_no",
         sortOrder: "asc",
         enableEntityJoin: true,
       });
 
-      const rows = result.data || [];
+      const rows = (result.data || []).map((row: Record<string, any>) => {
+        const mapped = { ...row };
+        // 엔티티 조인 필드 매핑: child_item_id_item_name → child_item_name 등
+        mapped.child_item_name = row[`${sourceFk}_item_name`] || row.child_item_name || "";
+        mapped.child_item_code = row[`${sourceFk}_item_number`] || row.child_item_code || "";
+        mapped.child_item_type = row[`${sourceFk}_type`] || row[`${sourceFk}_division`] || row.child_item_type || "";
+        return mapped;
+      });
+
       const tree = buildTree(rows);
       setTreeData(tree);
       const firstLevelIds = new Set<string>(tree.map((n: BomTreeNode) => n.id));
@@ -117,7 +132,7 @@ export function BomTreeComponent({
     } finally {
       setLoading(false);
     }
-  }, []);
+  }, [detailTable, foreignKey]);
 
   // 평면 데이터 -> 트리 구조 변환
   const buildTree = (flatData: any[]): BomTreeNode[] => {