fix(player): 修复返回首页黑屏并恢复预热

lib/pages/player/player_logic.dart

@@ -2,6 +2,7 @@
 
 import 'dart:async';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:video_player/video_player.dart';
 import 'package:flutter/scheduler.dart';
@@ -221,30 +222,36 @@ class PlayerLogic extends ChangeNotifier {
   /// 独立播放页覆盖首页时只暂停并保存进度，首页 session 与 controller 保持存活。
   Future<void> pauseForFullPlayer() async {
     if (!_started) return;
+    _logFeedHandoff('pause');
     cancelScrub();
     await session.pauseForRouteHandoff();
+    _logFeedHandoff('paused');
     await saveCurrentProgress();
   }
 
-  /// 返回首页前把仍存活的 feed controller 定位到第 1 集起点。
-  Future<void> prepareFeedResume() async {
-    if (!_started) return;
-    await session.playbackSettled;
-    final player = session.active;
-    if (player is VideoPlayerPort && player.controller.value.isInitialized) {
-      await player.seekTo(Duration.zero);
-    }
-  }
-
   /// 独立播放页关闭并恢复首页路由后，等原生播放器实际恢复再结束交接。
   Future<void> resumeAfterFullPlayer() async {
     if (!_started) return;
+    _logFeedHandoff('resume');
     if (visibleIndices.isNotEmpty) {
       await session.resumeForRouteHandoff();
     } else {
       session.setRouteVisible(false);
       await session.playbackSettled;
     }
+    _logFeedHandoff('resumed');
+  }
+
+  void _logFeedHandoff(String phase) {
+    if (!kDebugMode) return;
+    final player = session.active;
+    final video = player is VideoPlayerPort ? player : null;
+    debugPrint(
+      '[feed-session] phase=$phase session=${identityHashCode(session)} '
+      'index=${session.currentIndex} episode=${session.currentEpisode.id} '
+      'controller=${video == null ? '-' : identityHashCode(video.controller)} '
+      'live=${session.livePlayerCount}',
+    );
   }
 
   /// 串行替换首页 feed 队列；频道变化时重置到第 1 个，刷新时尽量保留当前剧。
@@ -283,7 +290,6 @@ class PlayerLogic extends ChangeNotifier {
       activate: activatePlayer,
       coordinator: coordinator,
       waitForFrame: _waitForFrame,
-      warmNeighborsEnabled: !homeMode,
     );
   }
 
@@ -1230,7 +1236,6 @@ class PlayerLogic extends ChangeNotifier {
       ),
     );
     if (!isMounted()) return;
-    await prepareFeedResume();
     await resumeAfterFullPlayer();
   }