fix(player): 收起键盘不关闭评论输入弹窗

lib/pages/player/widgets/comment_composer_sheet.dart

@@ -35,21 +35,16 @@ class CommentComposerSheet extends StatefulWidget {
   State<CommentComposerSheet> createState() => _CommentComposerSheetState();
 }
 
-class _CommentComposerSheetState extends State<CommentComposerSheet>
-    with WidgetsBindingObserver {
+class _CommentComposerSheetState extends State<CommentComposerSheet> {
   final _input = TextEditingController();
   final _inputFocus = FocusNode();
   final _keyboardInset = KeyboardInsetNotifier.instance;
-  bool _keyboardWasVisible = false;
-  bool _hadFocus = false;
   bool _closing = false;
 
   @override
   void initState() {
     super.initState();
-    WidgetsBinding.instance.addObserver(this);
     _input.addListener(_onInputChanged);
-    _inputFocus.addListener(_onFocusChanged);
     _keyboardInset.addListener(_onKeyboardInsetChanged);
     widget.controller.addListener(_onControllerChanged);
     unawaited(_keyboardInset.start());
@@ -57,9 +52,7 @@ class _CommentComposerSheetState extends State<CommentComposerSheet>
 
   @override
   void dispose() {
-    WidgetsBinding.instance.removeObserver(this);
     _input.removeListener(_onInputChanged);
-    _inputFocus.removeListener(_onFocusChanged);
     _keyboardInset.removeListener(_onKeyboardInsetChanged);
     widget.controller.removeListener(_onControllerChanged);
     _input.dispose();
@@ -75,36 +68,9 @@ class _CommentComposerSheetState extends State<CommentComposerSheet>
     if (mounted) setState(() {});
   }
 
-  void _onFocusChanged() {
-    if (!mounted) return;
-    final hasFocus = _inputFocus.hasFocus;
-    if (_hadFocus && !hasFocus) {
-      _closeSheet();
-    }
-    _hadFocus = hasFocus;
-    setState(() {});
-  }
-
   void _onKeyboardInsetChanged() {
     if (!mounted) return;
     setState(() {});
-    _syncKeyboardVisibility(_keyboardHeight(context));
-  }
-
-  @override
-  void didChangeMetrics() {
-    WidgetsBinding.instance.addPostFrameCallback((_) {
-      if (!mounted) return;
-      _syncKeyboardVisibility(_keyboardHeight(context));
-    });
-  }
-
-  void _syncKeyboardVisibility(double keyboardHeight) {
-    if (keyboardHeight > 0) {
-      _keyboardWasVisible = true;
-      return;
-    }
-    if (_keyboardWasVisible) _closeSheet();
   }
 
   double _keyboardHeight(BuildContext context) => math.max(
@@ -254,10 +220,6 @@ class _CommentComposerSheetState extends State<CommentComposerSheet>
                                   focusedBorder: InputBorder.none,
                                 ),
                                 onTap: signedIn ? null : _authenticate,
-                                onTapOutside: (_) {
-                                  _inputFocus.unfocus();
-                                  _closeSheet();
-                                },
                               ),
                             ),
                             const SizedBox(height: 12),