feat: Enhance BOM and UI components with improved label handling and data mapping

- Updated the BOM service to include additional fields in the BOM header retrieval, enhancing data richness.
- Enhanced the EditModal to automatically map foreign key fields to dot notation, improving data handling and user experience.
- Improved the rendering of labels in various components, allowing for customizable label positions and styles, enhancing UI flexibility.
- Added new properties for label positioning and spacing in the V2 component styles, allowing for better layout control.
- Enhanced the BomTreeComponent to support additional data mapping for entity joins, improving data accessibility and management.

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

@@ -291,6 +291,7 @@ export function BomTreeComponent({
           item_name: raw.item_name || "",
           item_code: raw.item_number || raw.item_code || "",
           item_type: raw.item_type || raw.division || "",
+          unit: raw.unit || raw.item_unit || "",
         } as BomHeaderInfo;
       }
     } catch (e) {
@@ -376,6 +377,18 @@ export function BomTreeComponent({
           detail.editData[key] = (headerInfo as any)[key];
         }
       });
+
+      // entity join된 필드를 dot notation으로도 매핑 (item_info.xxx 형식)
+      const h = headerInfo as Record<string, any>;
+      if (h.item_name) detail.editData["item_info.item_name"] = h.item_name;
+      if (h.item_type) detail.editData["item_info.division"] = h.item_type;
+      if (h.item_code || h.item_number) detail.editData["item_info.item_number"] = h.item_code || h.item_number;
+      if (h.unit) detail.editData["item_info.unit"] = h.unit;
+      // entity join alias 형식도 매핑
+      if (h.item_name) detail.editData["item_id_item_name"] = h.item_name;
+      if (h.item_type) detail.editData["item_id_division"] = h.item_type;
+      if (h.item_code || h.item_number) detail.editData["item_id_item_number"] = h.item_code || h.item_number;
+      if (h.unit) detail.editData["item_id_unit"] = h.unit;
     };
     // capture: true → EditModal 리스너(bubble)보다 반드시 먼저 실행
     window.addEventListener("openEditModal", handler, true);