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,
     );

test/comment/drama_comments_sheet_test.dart

@@ -549,32 +549,41 @@ void main() {
     expect(sheet, findsNothing);
   });
 
-  testWidgets(
-    'should_close_composer_overlay_on_back_without_closing_comments',
-    (tester) async {
-      final repository = FakeCommentRepository(
-        pages: [
-          CommentPage(
-            comments: [commentFixture(id: '10', content: 'A comment')],
-          ),
-        ],
-      );
+  testWidgets('should_hide_keyboard_on_back_without_closing_composer_overlay', (
+    tester,
+  ) async {
+    final repository = FakeCommentRepository(
+      pages: [
+        CommentPage(
+          comments: [commentFixture(id: '10', content: 'A comment')],
+        ),
+      ],
+    );
 
-      await _pumpSheet(tester, repository: repository);
-      await tester.tap(find.byKey(const Key('comment-input-placeholder')));
-      await tester.pumpAndSettle();
+    await _pumpSheet(tester, repository: repository);
+    await tester.tap(find.byKey(const Key('comment-input-placeholder')));
+    await tester.pumpAndSettle();
 
-      final sheet = find.byKey(const Key('player-comments-sheet'));
-      final composer = find.byKey(const Key('comment-composer-sheet'));
-      expect(sheet, findsOneWidget);
-      expect(composer, findsOneWidget);
+    final sheet = find.byKey(const Key('player-comments-sheet'));
+    final composer = find.byKey(const Key('comment-composer-sheet'));
+    expect(sheet, findsOneWidget);
+    expect(composer, findsOneWidget);
+    final input = find.byKey(const Key('comment-composer-input'));
+    await tester.tap(input);
+    await tester.pump();
+    expect(tester.widget<TextField>(input).focusNode?.hasFocus, isTrue);
 
-      await tester.binding.handlePopRoute();
-      await tester.pumpAndSettle();
-      expect(sheet, findsOneWidget);
-      expect(composer, findsNothing);
-    },
-  );
+    await tester.binding.handlePopRoute();
+    await tester.pumpAndSettle();
+    expect(sheet, findsOneWidget);
+    expect(composer, findsOneWidget);
+    expect(tester.widget<TextField>(input).focusNode?.hasFocus, isFalse);
+
+    await tester.tapAt(const Offset(20, 20));
+    await tester.pumpAndSettle();
+    expect(sheet, findsOneWidget);
+    expect(composer, findsNothing);
+  });
 
   testWidgets('should_use_polished_comment_sizes', (tester) async {
     final repository = FakeCommentRepository(