fix: remove redundant thumbnail popup during dpad timeline seeking

lib/widgets/video_controls/widgets/timeline_slider.dart

@@ -1,4 +1,3 @@
-import 'dart:async';
 import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
@@ -61,43 +60,12 @@ class TimelineSlider extends StatefulWidget {
 class _TimelineSliderState extends State<TimelineSlider> {
   double? _mousePosition;
   double? _dragValue;
-  bool _showKeySeekThumbnail = false;
-  Timer? _keySeekTimer;
 
   // Must match the slider track inset: max(overlayRadius, thumbRadius)
   static const _sliderPadding = 12.0;
 
   static const _thumbWidth = 160.0;
   static const _thumbHeight = 90.0;
-  static const _keySeekThumbnailTimeout = Duration(milliseconds: 800);
-
-  @override
-  void didUpdateWidget(TimelineSlider oldWidget) {
-    super.didUpdateWidget(oldWidget);
-    // Detect user-initiated seeks. A normal playback will advance the timeline
-    // a very short amount. But a bigger jump indicates that the user changed position.
-    // For now we will check half a second, but this can probably be made higher.
-    if (widget.thumbnailDataBuilder != null && _dragValue == null) {
-      final delta = (widget.position.inMilliseconds - oldWidget.position.inMilliseconds).abs();
-      if (delta > 500 && widget.focusNode?.hasFocus == true) {
-        _showKeySeekThumbnail = true;
-        _resetKeySeekTimer();
-      }
-    }
-  }
-
-  @override
-  void dispose() {
-    _keySeekTimer?.cancel();
-    super.dispose();
-  }
-
-  void _resetKeySeekTimer() {
-    _keySeekTimer?.cancel();
-    _keySeekTimer = Timer(_keySeekThumbnailTimeout, () {
-      if (mounted) setState(() => _showKeySeekThumbnail = false);
-    });
-  }
 
   Widget _buildTooltip(double sliderWidth, double pixelX, Duration time) {
     final thumbnailData = widget.thumbnailDataBuilder?.call(time);
@@ -183,12 +151,6 @@ class _TimelineSliderState extends State<TimelineSlider> {
             final fraction = ((_mousePosition! - _sliderPadding) / trackWidth).clamp(0.0, 1.0);
             final time = Duration(milliseconds: (fraction * durationMs).round());
             tooltip = _buildTooltip(sliderWidth, _mousePosition!, time);
-          } else if (_showKeySeekThumbnail && widget.thumbnailDataBuilder != null) {
-            // Show tooltip at current playback position when user is actively seeking via d-pad/keyboard
-            // Note that this has the lowest priority, so if the user hovers, that will show instead
-            final fraction = (widget.position.inMilliseconds / durationMs).clamp(0.0, 1.0);
-            final px = _sliderPadding + fraction * trackWidth;
-            tooltip = _buildTooltip(sliderWidth, px, widget.position);
           }
         }