refactor: restructure element composition

apps/client/src/views/cuesheet/cuesheet-table/cuesheet-table-elements/BlockRow.tsx

@@ -0,0 +1,27 @@
+import { memo } from 'react';
+
+import { useCurrentBlockId } from '../../../../common/hooks/useSocket';
+
+import style from '../CuesheetTable.module.scss';
+
+interface BlockRowProps {
+  hidePast: boolean;
+  title: string;
+}
+
+function BlockRow(props: BlockRowProps) {
+  const { hidePast, title } = props;
+  const { currentBlockId } = useCurrentBlockId();
+
+  if (hidePast && !currentBlockId) {
+    return null;
+  }
+
+  return (
+    <tr className={style.blockRow}>
+      <td>{title}</td>
+    </tr>
+  );
+}
+
+export default memo(BlockRow);