style(player): 播放页与首页浮层的控件样式统一

播放页顶部按钮与选集条去掉底色、进度条不再画滑块圆点并压到最底部；
剧名与简介收在互动栏左侧，清屏后只留右下角退出按钮。
首页观看条与进度条共用 20pt 页边距，进度槽底色与播放页一致。

lib/pages/player/widgets/home_feed_overlay.dart

@@ -21,13 +21,16 @@ import 'scrub_preview_card.dart';
 part 'home_feed_overlay_parts.dart';
 
 const double _progressHeight = 2;
-const double _progressHitHeight = 32;
+
+/// 进度条触控带高度：没有滑块圆点后收到 16pt，够手指按住这条线拖动。
+const double _progressHitHeight = 16;
 const double _pageHorizontal = 20;
 const double _railRight = 14;
 const double _railGap = 12;
-// 观看条高 44；2pt 进度线视觉上沿距观看条顶约 7pt（线中心距进度条盒底 8）。
-// 信息面板底边取 44+16=60，使简介↔进度线、进度线↔观看条两侧间距均为 7pt。
-const double _bottomInfoInset = homeFeedWatchAllHeight + 16;
+// 进度线贴着屏幕底部（线心距底 4pt），观看条底边只留 8pt，视觉上就是线上一根条。
+const double _watchAllBottomInset = 8;
+// 信息面板底边直接贴住观看条顶沿，中间不留缝。
+const double _bottomInfoInset = _watchAllBottomInset + homeFeedWatchAllHeight;
 const double _railBottomOffset = 40;
 const Duration _overlayFadeDuration = Duration(milliseconds: 120);
 const List<Shadow> _boostTextShadows = [
@@ -152,7 +155,7 @@ class _HomeFeedOverlayState extends State<HomeFeedOverlay> {
           Positioned(
             left: 0,
             right: 0,
-            bottom: homeFeedWatchAllHeight + 12,
+            bottom: _watchAllBottomInset + homeFeedWatchAllHeight + 12,
             child: AnimatedOpacity(
               duration: _overlayFadeDuration,
               opacity: widget.boosting ? 1 : 0,
@@ -162,10 +165,30 @@ class _HomeFeedOverlayState extends State<HomeFeedOverlay> {
               ),
             ),
           ),
+          // 观看条在下、进度条在上：进度条 32pt 触控盒要盖住观看条下沿的空白，
+          // 否则拖拽 seek 的起点会被观看条吞掉。两块的可见区域（文字/进度线）互不遮挡。
           Positioned(
             left: _pageHorizontal,
             right: _pageHorizontal,
-            bottom: homeFeedWatchAllHeight,
+            bottom: _watchAllBottomInset,
+            child: AnimatedOpacity(
+              duration: _overlayFadeDuration,
+              opacity: widget.visible && !_scrubbing && !widget.boosting
+                  ? 1
+                  : 0,
+              child: IgnorePointer(
+                ignoring: !widget.visible || _scrubbing || widget.boosting,
+                child: HomeFeedWatchAllBar(
+                  drama: widget.drama,
+                  onTap: widget.onOpenFullPlayer,
+                ),
+              ),
+            ),
+          ),
+          Positioned(
+            left: _pageHorizontal,
+            right: _pageHorizontal,
+            bottom: 0,
             child: _FeedProgressBar(
               controller: widget.controller,
               locked: widget.locked,
@@ -182,27 +205,7 @@ class _HomeFeedOverlayState extends State<HomeFeedOverlay> {
               onSeek: widget.onSeek,
             ),
           ),
-          Positioned(
-            left: 0,
-            right: 0,
-            bottom: 0,
-            child: AnimatedOpacity(
-              duration: _overlayFadeDuration,
-              opacity: widget.visible && !_scrubbing && !widget.boosting
-                  ? 1
-                  : 0,
-              child: IgnorePointer(
-                ignoring: !widget.visible || _scrubbing || widget.boosting,
-                child: HomeFeedWatchAllBar(
-                  drama: widget.drama,
-                  onTap: widget.onOpenFullPlayer,
-                ),
-              ),
-            ),
-          ),
-          // 信息面板放在最后（最上层）：进度条 32px 触控盒向上伸进底部避让区，
-          // 若面板在前，简介/展开按钮底部的触控留白会被进度条吞掉点击。
-          // 视觉上避让条带为空，提层不改变观感。
+          // 信息面板放在最后（最上层），底部避让区永远优先响应简介/展开按钮的点击。
           Positioned(
             left: _pageHorizontal,
             right: _railRight,