Progress row

A place to do work inside the form: select the row, press Enter, and its work runs with a determinate bar (when it declares a step count) or an indeterminate spinner (when it does not), drawn in the row itself as the work advances. It collects no value - it sits beside the fields it depends on, not among the answers, so it's a block of its own rather than a kind of field.

use DrevOps\PhpTui\Primitive\ProgressReporter;

$p->progress('pack', 'Packing the box')
  ->steps(6) // Omit for an indeterminate spinner.
  ->work(function (ProgressReporter $reporter) use ($items): void {
    foreach ($items as $item) {
      // ... one step of work ...
      $reporter->advance(); // Fills one step of the bar (ticks the spinner).
    }
  });

Runnable script: playground/02-progress-row.php.

Options

Method	Effect
`->steps(int)`	The step count, making the indicator a determinate bar. Omit it for an indeterminate spinner.
`->work(Closure)`	The work run when the row is activated. The closure receives a `ProgressReporter` and calls `advance()` once per step.

The indicator is drawn by the active theme, in its accent and Unicode/ASCII mode - the same spinner and bar as the standalone progress() primitive. The row carries the cursor mark every other row you land on carries, in the same column: the indicator says what the work is doing, and the mark says whether pressing Enter would start it. The primitive takes no cursor and draws no mark.