fix(player): 评论入口文字垂直居中

test/comment/drama_comments_sheet_test.dart

@@ -109,6 +109,16 @@ void main() {
     final input = find.byKey(const Key('comment-input'));
     expect(input, findsOneWidget);
     expect(tester.widget<TextField>(input).focusNode?.hasFocus, isTrue);
+    expect(
+      tester.widget<TextField>(input).textAlignVertical,
+      TextAlignVertical.center,
+    );
+
+    await tester.enterText(input, 'First line\nSecond line');
+    await tester.pump();
+    final multilineField = tester.widget<TextField>(input);
+    expect(multilineField.textAlignVertical, TextAlignVertical.top);
+    expect(multilineField.style?.height, 1.4);
   });
 
   testWidgets('should_gate_guest_post_without_creating_comment', (
@@ -492,6 +502,17 @@ void main() {
       tester.getSize(find.byKey(const Key('comment-input-placeholder'))).height,
       44,
     );
+    final placeholderLabel = find.byKey(
+      const Key('comment-input-placeholder-label'),
+    );
+    final placeholderSendIcon = find.descendant(
+      of: find.byKey(const Key('comment-post')),
+      matching: find.byIcon(Icons.send_rounded),
+    );
+    expect(
+      tester.getCenter(placeholderLabel).dy,
+      closeTo(tester.getCenter(placeholderSendIcon).dy, 1),
+    );
     expect(find.byKey(const Key('player-comments-drag-handle')), findsNothing);
     expect(
       tester.getSize(find.byKey(const Key('player-comments-close'))),