fix(recommend): 收窄拖动清屏范围并提升灵敏度

docs/plans/PROGRESS.md

@@ -1184,6 +1184,6 @@ $ flutter test
 - 剧名 19/w600，箭头 20 白色并紧邻剧名；标签行改为 13/w600 亮灰内联布局。
 - 简介「展开/收起」沿用现有三语文案；进度条热区恢复 24 并接入拖动自动清屏与预览卡片。
 - 拖动仅控制视频浮层内容，顶部导航与根底栏保持常驻。
-- 进度条固定中心并动画到 6 高，时间气泡限制在左右 12；end/cancel/pointer 兜底均恢复拖动前状态。
+- 进度条固定中心并动画到 6 高，命中高度 32，时间气泡限制在左右 12；end/cancel/pointer 兜底均恢复拖动前状态。
 - 修复 `scrubCancelRequest` 误置于 `initState` 的编译错误，并清理推荐页未使用变量；`flutter analyze` 无问题。
 - 观看全集按钮相对进度条上移 8，间距调整为 20；按钮改为屏幕宽度 70% 左对齐，`flutter analyze` 无问题。

lib/pages/player/widgets/home_feed_overlay.dart

@@ -3,6 +3,7 @@
 import 'dart:async';
 
 import 'package:flutter/foundation.dart';
+import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:video_player/video_player.dart';
 
@@ -18,11 +19,11 @@ import 'seek_progress_bar.dart';
 part 'home_feed_overlay_parts.dart';
 
 const double _progressHeight = 2;
-const double _progressHitHeight = 28;
+const double _progressHitHeight = 32;
 const double _pageHorizontal = 14;
 const double _railRight = 8;
 const double _railGap = 12;
-const double _bottomInfoInset = 20;
+const double _bottomInfoInset = 32;
 const double _railBottomOffset = 60;
 const List<Shadow> _boostTextShadows = [
   Shadow(color: AppColors.shadow, blurRadius: 5, offset: Offset(0, 1)),

lib/pages/player/widgets/home_feed_overlay_parts.dart

@@ -129,6 +129,7 @@ class _FeedProgressBarState extends State<_FeedProgressBar> {
           child: GestureDetector(
             key: const Key('home-feed-progress'),
             behavior: HitTestBehavior.opaque,
+            dragStartBehavior: DragStartBehavior.down,
             onHorizontalDragStart: interactive
                 ? (details) => _startScrub(details.localPosition.dx / width)
                 : null,

test/home/home_preview_layout_test.dart

@@ -3,6 +3,7 @@
 import 'dart:async';
 import 'dart:typed_data';
 
+import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:shared_preferences_platform_interface/in_memory_shared_preferences_async.dart';
@@ -664,6 +665,11 @@ void main() {
     );
     expect(bar.left, closeTo(overlayRect.left + 14, 0.1));
     expect(bar.width, closeTo(overlayRect.width * 0.7, 1));
+    expect(
+      tester.getCenter(find.byKey(const Key('home-feed-progress-track'))).dy -
+          bar.bottom,
+      greaterThanOrEqualTo(20),
+    );
     final buttonBackground =
         tester
                 .widget<DecoratedBox>(
@@ -685,7 +691,13 @@ void main() {
     );
     expect(
       tester.getSize(find.byKey(const Key('home-feed-progress'))).height,
-      greaterThanOrEqualTo(28),
+      greaterThanOrEqualTo(32),
+    );
+    expect(
+      tester
+          .widget<GestureDetector>(find.byKey(const Key('home-feed-progress')))
+          .dragStartBehavior,
+      DragStartBehavior.down,
     );
     final idleTrackCenter = tester
         .getRect(find.byKey(const Key('home-feed-progress-track')))