cleanup swipes

lib/utils/horizontal_swipe_recognizer.dart

@@ -31,11 +31,6 @@ class HorizontalSwipeRecognizer extends HorizontalDragGestureRecognizer {
     super.addAllowedPointer(event);
   }
 
-  double _slopFor(PointerEvent event) {
-    final kind = _pointerKind ?? event.kind;
-    return computeHitSlop(kind, gestureSettings);
-  }
-
   @override
   void handleEvent(PointerEvent event) {
     if (!_resolvedDirection &&
@@ -47,7 +42,8 @@ class HorizontalSwipeRecognizer extends HorizontalDragGestureRecognizer {
       if (deltaX != 0.0) {
         final logicalDelta = deltaX * allowedSign;
         _accumulatedDelta += logicalDelta;
-        final slop = _slopFor(event);
+        final slop =
+            computeHitSlop(_pointerKind ?? event.kind, gestureSettings);
         if (_accumulatedDelta.abs() > slop) {
           _resolvedDirection = true;
           if (_accumulatedDelta < 0) {

lib/utils/reply_swipe.dart

@@ -51,7 +51,16 @@ class _ReplySwipeState extends State<ReplySwipe>
       setState(() => _dragX = clamped);
       final crossed = _dragX >= widget.thresholdPx;
       if (widget.hapticOnThreshold && crossed && !_thresholdBuzzed) {
-        HapticFeedback.selectionClick();
+        final future = HapticFeedback.selectionClick();
+        assert(() {
+          future.then(
+            (_) => debugPrint('ReplySwipe: selectionClick succeeded'),
+            onError: (Object error, StackTrace stack) {
+              debugPrint('ReplySwipe: selectionClick failed: $error');
+            },
+          );
+          return true;
+        }());
         _thresholdBuzzed = true;
       }
       if (!crossed) _thresholdBuzzed = false;
@@ -87,9 +96,9 @@ class _ReplySwipeState extends State<ReplySwipe>
     final allowedSign = widget.leftToRight ? -1 : 1;
     final sign = allowedSign.toDouble();
     final progress = (_dragX / widget.maxDragPx).clamp(0.0, 1.0).toDouble();
+    final backgroundBuilder = widget.backgroundBuilder;
 
     return RawGestureDetector(
-      behavior: HitTestBehavior.deferToChild,
       gestures: {
         HorizontalSwipeRecognizer:
             GestureRecognizerFactoryWithHandlers<HorizontalSwipeRecognizer>(
@@ -120,13 +129,14 @@ class _ReplySwipeState extends State<ReplySwipe>
       child: Stack(
         alignment: Alignment.center,
         children: [
-          Positioned.fill(
-            child: widget.backgroundBuilder!(
-              context,
-              widget.leftToRight,
-              progress,
+          if (backgroundBuilder != null)
+            Positioned.fill(
+              child: backgroundBuilder(
+                context,
+                widget.leftToRight,
+                progress,
+              ),
             ),
-          ),
           Transform.translate(
             offset: Offset(sign * _dragX, 0.0),
             child: widget.child,

lib/utils/swipeable_page.dart

@@ -194,9 +194,10 @@ class _FullScreenPopGestureDetectorState<T>
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    _recognizer.gestureSettings = MediaQuery.maybeGestureSettingsOf(context);
     final textDirection = Directionality.of(context);
-    _recognizer.allowedSign = textDirection == TextDirection.rtl ? -1 : 1;
+    _recognizer
+      ..gestureSettings = MediaQuery.maybeGestureSettingsOf(context)
+      ..allowedSign = textDirection == TextDirection.rtl ? -1 : 1;
   }
 
   /// Dispose the recognizer and ensure the navigator ends any active gesture.