fix ref ts error

Author: sawka

frontend/app/view/preview/csvview.tsx

@@ -193,7 +193,7 @@ const CSVView = ({ parentRef, filename, content }: CSVViewProps) => {
                 </thead>
                 <tbody style={{ height: `${state.tbodyHeight}px` }} ref={tbodyRef}>
                     {table.getRowModel().rows.map((row, index) => (
-                        <tr key={row.id} ref={(el) => (rowRef.current[index] = el)} id={row.id} tabIndex={index}>
+                        <tr key={row.id} ref={(el) => { rowRef.current[index] = el; }} id={row.id} tabIndex={index}>
                             {row.getVisibleCells().map((cell) => (
                                 <td key={cell.id} id={cell.id} tabIndex={index}>
                                     {flexRender(cell.column.columnDef.cell, cell.getContext())}