feat: Enhance image handling in TableCellImage component

- Updated the TableCellImage component to support multiple image inputs, displaying a representative image when available.
- Implemented a new helper function `loadImageBlob` for loading images from blob URLs, improving image loading efficiency.
- Refactored image loading logic to handle both single and multiple objid cases, ensuring robust error handling and loading states.
- Enhanced user experience by allowing direct URL usage for non-objid image paths.

frontend/lib/registry/components/v2-table-list/TableListComponent.tsx

@@ -14,53 +14,71 @@ import { v2EventBus, V2_EVENTS, V2ErrorBoundary } from "@/lib/v2-core";
 
 // 🖼️ 테이블 셀 이미지 썸네일 컴포넌트
 // objid인 경우 인증된 API로 blob URL 생성, 경로인 경우 직접 URL 사용
+// 다중 이미지(콤마 구분)인 경우 대표 이미지를 우선 표시
 const TableCellImage: React.FC<{ value: string }> = React.memo(({ value }) => {
   const [imgSrc, setImgSrc] = React.useState<string | null>(null);
+  const [displayObjid, setDisplayObjid] = React.useState<string>("");
   const [error, setError] = React.useState(false);
   const [loading, setLoading] = React.useState(true);
 
   React.useEffect(() => {
     let mounted = true;
-    // 다중 이미지인 경우 대표 이미지(첫 번째)만 사용
     const rawValue = String(value);
-    const strValue = rawValue.includes(",") ? rawValue.split(",")[0].trim() : rawValue;
+    const parts = rawValue.split(",").map(s => s.trim()).filter(Boolean);
+
+    // 단일 값 또는 경로인 경우
+    if (parts.length <= 1) {
+      const strValue = parts[0] || rawValue;
+      setDisplayObjid(strValue);
       const isObjid = /^\d+$/.test(strValue);
 
       if (isObjid) {
-      // objid인 경우: 인증된 API로 blob 다운로드
+        loadImageBlob(strValue, mounted, setImgSrc, setError, setLoading);
-      const loadImage = async () => {
-        try {
-          const { apiClient } = await import("@/lib/api/client");
-          const response = await apiClient.get(`/files/preview/${strValue}`, {
-            responseType: "blob",
-          });
-          if (mounted) {
-            const blob = new Blob([response.data]);
-            const url = window.URL.createObjectURL(blob);
-            setImgSrc(url);
-            setLoading(false);
-          }
-        } catch {
-          if (mounted) {
-            setError(true);
-            setLoading(false);
-          }
-        }
-      };
-      loadImage();
       } else {
-      // 경로인 경우: 직접 URL 사용
         setImgSrc(getFullImageUrl(strValue));
         setLoading(false);
       }
-
+      return () => { mounted = false; };
-    return () => {
-      mounted = false;
-      // blob URL 해제
-      if (imgSrc && imgSrc.startsWith("blob:")) {
-        window.URL.revokeObjectURL(imgSrc);
     }
-    };
+
+    // 다중 objid: 대표 이미지를 찾아서 표시
+    const objids = parts.filter(s => /^\d+$/.test(s));
+    if (objids.length === 0) {
+      setLoading(false);
+      setError(true);
+      return () => { mounted = false; };
+    }
+
+    (async () => {
+      try {
+        const { getFileInfoByObjid } = await import("@/lib/api/file");
+        let representativeId: string | null = null;
+
+        // 각 objid의 대표 여부를 확인
+        for (const objid of objids) {
+          const info = await getFileInfoByObjid(objid);
+          if (info.success && info.data?.isRepresentative) {
+            representativeId = objid;
+            break;
+          }
+        }
+
+        // 대표 이미지가 없으면 첫 번째 사용
+        const targetObjid = representativeId || objids[0];
+        if (mounted) {
+          setDisplayObjid(targetObjid);
+          loadImageBlob(targetObjid, mounted, setImgSrc, setError, setLoading);
+        }
+      } catch {
+        if (mounted) {
+          // 대표 조회 실패 시 첫 번째 사용
+          setDisplayObjid(objids[0]);
+          loadImageBlob(objids[0], mounted, setImgSrc, setError, setLoading);
+        }
+      }
+    })();
+
+    return () => { mounted = false; };
   // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [value]);
 
@@ -91,10 +109,8 @@ const TableCellImage: React.FC<{ value: string }> = React.memo(({ value }) => {
         style={{ maxWidth: "40px", maxHeight: "40px" }}
         onClick={(e) => {
           e.stopPropagation();
-          const rawValue = String(value);
+          const isObjid = /^\d+$/.test(displayObjid);
-          const strValue = rawValue.includes(",") ? rawValue.split(",")[0].trim() : rawValue;
+          const openUrl = isObjid ? getFilePreviewUrl(displayObjid) : getFullImageUrl(displayObjid);
-          const isObjid = /^\d+$/.test(strValue);
-          const openUrl = isObjid ? getFilePreviewUrl(strValue) : getFullImageUrl(strValue);
           window.open(openUrl, "_blank");
         }}
         onError={() => setError(true)}
@@ -104,6 +120,32 @@ const TableCellImage: React.FC<{ value: string }> = React.memo(({ value }) => {
 });
 TableCellImage.displayName = "TableCellImage";
 
+// 이미지 blob 로딩 헬퍼
+function loadImageBlob(
+  objid: string,
+  mounted: boolean,
+  setImgSrc: (url: string) => void,
+  setError: (err: boolean) => void,
+  setLoading: (loading: boolean) => void,
+) {
+  import("@/lib/api/client").then(({ apiClient }) => {
+    apiClient.get(`/files/preview/${objid}`, { responseType: "blob" })
+      .then((response) => {
+        if (mounted) {
+          const blob = new Blob([response.data]);
+          setImgSrc(window.URL.createObjectURL(blob));
+          setLoading(false);
+        }
+      })
+      .catch(() => {
+        if (mounted) {
+          setError(true);
+          setLoading(false);
+        }
+      });
+  });
+}
+
 // 🆕 RelatedDataButtons 전역 레지스트리 타입 선언
 declare global {
   interface Window {