가상투자 로직 변경

frontend/src/components/paper/PaperLedgerTab.tsx

@@ -21,7 +21,7 @@ const PaperLedgerTab: React.FC<Props> = ({ refreshKey = 0 }) => {
 
   useEffect(() => {
     let cancelled = false;
-    setLoading(true);
+    if (entries.length === 0) setLoading(true);
     void loadPaperLedger({ page: 0, size: 50 }).then(page => {
       if (!cancelled) {
         setEntries(page.content);
@@ -29,6 +29,8 @@ const PaperLedgerTab: React.FC<Props> = ({ refreshKey = 0 }) => {
       }
     });
     return () => { cancelled = true; };
+    // entries.length: 최초 로드만 스피너 — 갱신 시 목록 유지(깜빡임 방지)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [refreshKey]);
 
   if (loading) return <p className="ptd-muted">원장 로딩…</p>;