refactor(ui): 清理 K26 旧 UI 与死代码

lib/pages/player/player_logic.dart

@@ -3,7 +3,6 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 
 import '../../core/data/models/drama.dart';
@@ -71,10 +70,8 @@ class PlayerLogic extends ChangeNotifier {
   bool muted = false;
   bool stoppedAtFeedEnd = false;
   VideoPlayerPort? scrubbingPlayer;
-  bool fullscreen = false;
   bool pip = false;
   bool pipPreparing = false;
-  bool screenCleared = false;
   final Map<String, int> pickedEpisode = {};
 
   bool Function() isMounted = () => false;
@@ -98,9 +95,9 @@ class PlayerLogic extends ChangeNotifier {
   /// dispose 不能直接碰它们（例如页面构建失败或纯逻辑测试）。
   bool _started = false;
 
-  bool get immersive => fullscreen || pip || pipPreparing;
+  bool get immersive => pip || pipPreparing;
 
-  bool get chromeHidden => immersive || screenCleared;
+  bool get chromeHidden => immersive;
 
   Episode displayEpisode(Drama drama, Episode fallback) {
     final number = pickedEpisode[drama.id];
@@ -111,13 +108,6 @@ class PlayerLogic extends ChangeNotifier {
     return fallback;
   }
 
-  void setScreenCleared(bool value) {
-    if (screenCleared == value) return;
-    screenCleared = value;
-    notify();
-    notifyImmersive();
-  }
-
   void notify() {
     if (!_disposed) notifyListeners();
   }
@@ -262,13 +252,7 @@ class PlayerLogic extends ChangeNotifier {
       final request = backRequest;
       WidgetsBinding.instance.addPostFrameCallback((_) {
         if (isMounted() && backRequest == request) {
-          if (fullscreen) {
-            unawaited(setFullscreen(false));
-          } else if (screenCleared) {
-            setScreenCleared(false);
-          } else {
-            onMenu?.call();
-          }
+          onMenu?.call();
         }
       });
     }
@@ -295,12 +279,6 @@ class PlayerLogic extends ChangeNotifier {
     if (_disposed) return;
     _disposed = true;
     pictureInPicture.setStateListener(null);
-    if (fullscreen) {
-      unawaited(
-        SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]),
-      );
-      unawaited(SystemChrome.setEnabledSystemUIMode(SystemUiMode.edgeToEdge));
-    }
     unawaited(saveCurrentProgress());
     if (_started) {
       session.setRouteVisible(false);
@@ -313,32 +291,6 @@ class PlayerLogic extends ChangeNotifier {
 
   void notifyImmersive() => onImmersiveChanged?.call(chromeHidden);
 
-  Future<void> setFullscreen(bool value) async {
-    if (fullscreen == value || !isMounted()) return;
-    fullscreen = value;
-    notify();
-    notifyImmersive();
-    try {
-      await SystemChrome.setPreferredOrientations(
-        value
-            ? [
-                DeviceOrientation.landscapeLeft,
-                DeviceOrientation.landscapeRight,
-              ]
-            : [DeviceOrientation.portraitUp],
-      );
-      await SystemChrome.setEnabledSystemUIMode(
-        value ? SystemUiMode.immersiveSticky : SystemUiMode.edgeToEdge,
-      );
-    } catch (_) {
-      if (value && isMounted()) {
-        fullscreen = false;
-        notify();
-        notifyImmersive();
-      }
-    }
-  }
-
   Future<void> enterPip(BuildContext context) async {
     if (pip || pipPreparing) return;
     if (session.active is! VideoPlayerPort) {
@@ -347,7 +299,6 @@ class PlayerLogic extends ChangeNotifier {
       );
       return;
     }
-    if (fullscreen) await setFullscreen(false);
     pipPreparing = true;
     notify();
     notifyImmersive();