Extract _TaskCard from the list screen into ProgrammerTaskCard, a
shared ConsumerWidget that reads programmerRunStatesProvider so the
paused-task pill and Start/Resume/Complete buttons are consistent
across any surface that embeds it.
Move the _complete body verbatim to completeProgrammerTaskWithConfirm
in programmer_task_actions.dart; the detail screen's _ActionBar now
calls the shared function.
Co-Authored-By: claude-flow <ruv@ruv.net>