refactor(programmer): shared task card driven by run states

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>

lib/screens/programmer_tasks/programmer_task_detail_screen.dart

@@ -325,7 +325,8 @@ class _ActionBar extends ConsumerWidget {
           ),
         if (isRunning || isPaused)
           OutlinedButton.icon(
-            onPressed: () => _complete(context, ref, task),
+            onPressed: () =>
+                completeProgrammerTaskWithConfirm(context, ref, task),
             icon: const Icon(Icons.check_rounded),
             label: const Text('Complete'),
           ),
@@ -340,35 +341,6 @@ class _ActionBar extends ConsumerWidget {
 }
 
 
-Future<void> _complete(
-  BuildContext context,
-  WidgetRef ref,
-  ProgrammerTask task,
-) async {
-  final messenger = ScaffoldMessenger.of(context);
-  final ok = await showDialog<bool>(
-    context: context,
-    builder: (context) => AlertDialog(
-      semanticLabel: 'Complete task',
-      title: const Text('Complete task?'),
-      content: Text('Mark "${task.title}" as completed?'),
-      actions: [
-        TextButton(
-          onPressed: () => Navigator.of(context).pop(false),
-          child: const Text('Cancel'),
-        ),
-        FilledButton(
-          onPressed: () => Navigator.of(context).pop(true),
-          child: const Text('Complete'),
-        ),
-      ],
-    ),
-  );
-  if (ok != true) return;
-  await ref.read(programmerTasksControllerProvider).completeTask(taskId: task.id);
-  messenger.showSnackBar(const SnackBar(content: Text('Task completed')));
-}
-
 Future<void> _cancel(
   BuildContext context,
   WidgetRef ref,