Use columnConfig to control which columns appear in the task list, their order, and width. By
default (autoSizeColumns) each column fits its header + content and the panel grows so nothing
clips; toggle it off to compare with the legacy fixed-width behavior. Toggle columns on/off, drag to reorder,
or set a minimum pixel width per column — the chart updates instantly. Tip: drag the handle
at the right edge of any column header to make that column wider or thinner (double-click the handle to reset
it), or drag a column header left/right to reorder columns. Disable these with
resizableColumns: false / reorderableColumns: false.