Drag-to-reorder lists: manual sort_order is canonical, fractional re-slotting, haptic pickup/drop

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/src/components/TaskRow.tsx

@@ -11,11 +11,14 @@ export default function TaskRow({
   task,
   uncheckTo = "next",
   showStatus,
+  onLongPress,
 }: {
   task: Task;
   /** Status to revert to when un-checking a done task. */
   uncheckTo?: TaskStatus;
   showStatus?: boolean;
+  /** Drag handle for reorderable lists. */
+  onLongPress?: () => void;
 }) {
   const router = useRouter();
   const meta = [
@@ -37,7 +40,7 @@ export default function TaskRow({
 
   return (
     <Animated.View entering={FadeIn.duration(150)}>
-      <Pressable style={s.row} onPress={() => router.push(`/task/${task.id}`)}>
+      <Pressable style={s.row} onPress={() => router.push(`/task/${task.id}`)} onLongPress={onLongPress} delayLongPress={200}>
         <Pressable
           style={[s.checkbox, { borderColor: PRIORITY_COLOR[task.priority] }]}
           hitSlop={10}