fix: LOCK-OWNER 카드 비활성화 UI 누락분 반영

a2c532c7 커밋에서 누락된 CardV2 잠금 UI를 반영한다.
- locked 계산: ownerSortColumn 값이 존재하고 현재 사용자와 불일치 시 true
- isLockedByOther prop을 CardV2에 전달
- 잠금 카드: opacity-50, cursor-not-allowed, onClick/onKeyDown 차단, tabIndex=-1

frontend/lib/registry/pop-components/pop-card-list-v2/PopCardListV2Component.tsx

@@ -1067,7 +1067,11 @@ export function PopCardListV2Component({
             className={`min-h-0 flex-1 grid ${scrollClassName}`}
             style={{ ...cardAreaStyle, alignContent: "start", justifyContent: isHorizontalMode ? "start" : "center" }}
           >
-            {displayCards.map((row, index) => (
+            {displayCards.map((row, index) => {
+              const locked = !!ownerSortColumn
+                && !!String(row[ownerSortColumn] ?? "")
+                && String(row[ownerSortColumn] ?? "") !== (currentUserId ?? "");
+              return (
                 <CardV2
                   key={`card-${index}`}
                   row={row}
@@ -1095,8 +1099,10 @@ export function PopCardListV2Component({
                   onEnterSelectMode={enterSelectMode}
                   onOpenPopModal={openPopModal}
                   currentUserId={currentUserId}
+                  isLockedByOther={locked}
                 />
-            ))}
+              );
+            })}
           </div>
 
           {/* 선택 모드 하단 액션 바 */}
@@ -1394,16 +1400,24 @@ function CardV2({
 
   return (
     <div
-      className={`relative flex cursor-pointer flex-col rounded-lg border bg-card shadow-sm transition-all duration-150 hover:shadow-md ${borderClass}`}
+      className={cn(
+        "relative flex flex-col rounded-lg border bg-card shadow-sm transition-all duration-150",
+        isLockedByOther
+          ? "cursor-not-allowed opacity-50"
+          : "cursor-pointer hover:shadow-md",
+        borderClass,
+      )}
       style={{ minHeight: `${spec.height}px` }}
       onClick={() => {
+        if (isLockedByOther) return;
         if (selectMode && isSelectable) { onToggleRowSelect?.(); return; }
         if (!selectMode) onSelect?.(row);
       }}
       role="button"
-      tabIndex={0}
+      tabIndex={isLockedByOther ? -1 : 0}
       onKeyDown={(e) => {
         if (e.key === "Enter" || e.key === " ") {
+          if (isLockedByOther) return;
           if (selectMode && isSelectable) { onToggleRowSelect?.(); return; }
           if (!selectMode) onSelect?.(row);
         }