feat: enhance category mapping and label resolution in split panel layouts

- Added functionality to resolve unresolved category labels after data loading in SplitPanelLayout2Component.
- Implemented batch API calls to fetch missing category labels based on unresolved codes.
- Improved category mapping logic in SplitPanelLayoutComponent to handle join tables and provide fallback mappings.
- Enhanced the user experience by ensuring that category labels are correctly displayed even when they are initially unresolved.

These changes aim to improve the robustness of category handling across the split panel components.

frontend/lib/registry/components/split-panel-layout2/SplitPanelLayout2Component.tsx

@@ -36,7 +36,7 @@ import { Card, CardContent } from "@/components/ui/card";
 import { toast } from "sonner";
 import { useScreenContextOptional } from "@/contexts/ScreenContext";
 import { apiClient } from "@/lib/api/client";
-import { getCategoryValues } from "@/lib/api/tableCategoryValue";
+import { getCategoryValues, getCategoryLabelsByCodes } from "@/lib/api/tableCategoryValue";
 
 export interface SplitPanelLayout2ComponentProps extends ComponentRendererProps {
   // 추가 props
@@ -1354,6 +1354,40 @@ export const SplitPanelLayout2Component: React.FC<SplitPanelLayout2ComponentProp
     loadCategoryLabels();
   }, [isDesignMode, config.leftPanel?.tableName, config.rightPanel?.tableName, config.leftPanel?.displayColumns, config.rightPanel?.displayColumns, config.rightPanel?.tabConfig?.tabSourceColumn, config.leftPanel?.tabConfig?.tabSourceColumn]);
 
+  // 데이터 로드 후 미해결 카테고리 코드를 batch API로 변환
+  useEffect(() => {
+    if (isDesignMode) return;
+    const allData = [...leftData, ...rightData];
+    if (allData.length === 0) return;
+
+    const unresolvedCodes = new Set<string>();
+    const checkValue = (v: unknown) => {
+      if (typeof v === "string" && (v.startsWith("CAT_") || v.startsWith("CATEGORY_"))) {
+        if (!categoryLabelMap[v]) unresolvedCodes.add(v);
+      }
+    };
+    for (const item of allData) {
+      for (const val of Object.values(item)) {
+        if (Array.isArray(val)) {
+          val.forEach(checkValue);
+        } else {
+          checkValue(val);
+        }
+      }
+    }
+
+    if (unresolvedCodes.size === 0) return;
+
+    const resolveMissingLabels = async () => {
+      const result = await getCategoryLabelsByCodes(Array.from(unresolvedCodes));
+      if (result.success && result.data && Object.keys(result.data).length > 0) {
+        setCategoryLabelMap((prev) => ({ ...prev, ...result.data }));
+      }
+    };
+
+    resolveMissingLabels();
+  }, [isDesignMode, leftData, rightData, categoryLabelMap]);
+
   // 컴포넌트 언마운트 시 DataProvider 해제
   useEffect(() => {
     return () => {