A cell inside a PhoenixPaper.TableRow (pp_table_cell/1) — renders a <th> when variant="head", a <td> otherwise. See PhoenixPaper.Table's moduledoc for a full example.

sortable turns a head cell into MUI's TableSortLabel equivalent: a clickable button with a direction arrow, styled by sort_direction (nil — sortable but not the active column, "asc", or "desc"). Unlike MUI, this is presentation only — there's no click handling built in, wire your own phx-click/phx-value-* via the normal global attrs (e.g. phx-click="sort" phx-value-column="name"); the LiveView owns which column is active and in which direction, the same as it owns the actual sorted data. rest lands on the <button> when sortable, or on the <th>/<td> itself otherwise (e.g. for colspan/rowspan).