fix(player): 返回键仅收起评论输入键盘

lib/pages/player/widgets/drama_comments_sheet.dart

@@ -4,6 +4,7 @@ import 'dart:async';
 import 'dart:math' as math;
 
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 
 import '../../../core/data/models/comment.dart';
@@ -202,7 +203,12 @@ class _DramaCommentsSheetState extends State<DramaCommentsSheet> {
     return PopScope(
       canPop: _composerOverlay == null,
       onPopInvokedWithResult: (didPop, _) {
-        if (!didPop && _composerOverlay != null) _closeComposer();
+        if (!didPop && _composerOverlay != null) {
+          FocusManager.instance.primaryFocus?.unfocus();
+          unawaited(
+            SystemChannels.textInput.invokeMethod<void>('TextInput.hide'),
+          );
+        }
       },
       child: content,
     );