fix(following): 收紧取消追剧确认弹窗

lib/pages/following/following_edit_bar.dart

@@ -27,6 +27,7 @@ const double _barButtonHeight = 30;
 const double _removeDialogButtonHeight = 32;
 const double _removeDialogRadius = 6;
 const double _removeDialogBottomInset = 8;
+const double _cancelFollowingDialogPadding = 20;
 
 /// 播放历史移除确认。只把移除按钮压矮。
 Future<bool> confirmHistoryRemove(BuildContext context) async {
@@ -71,13 +72,32 @@ Future<bool> confirmCancelFollowing(BuildContext context) async {
   return await showDialog<bool>(
         context: context,
         builder: (dialogContext) => AlertDialog(
+          contentPadding: const EdgeInsets.all(_cancelFollowingDialogPadding),
+          actionsPadding: const EdgeInsets.fromLTRB(
+            _cancelFollowingDialogPadding,
+            0,
+            _cancelFollowingDialogPadding,
+            _cancelFollowingDialogPadding,
+          ),
           content: Text(l10n.confirmCancelFollowing),
           actions: [
             TextButton(
+              style: TextButton.styleFrom(
+                visualDensity: VisualDensity.standard,
+                tapTargetSize: MaterialTapTargetSize.shrinkWrap,
+                minimumSize: const Size(0, _removeDialogButtonHeight),
+                padding: const EdgeInsets.symmetric(horizontal: 12),
+              ),
               onPressed: () => Navigator.pop(dialogContext, false),
               child: Text(l10n.cancel),
             ),
             FilledButton(
+              style: FilledButton.styleFrom(
+                visualDensity: VisualDensity.standard,
+                tapTargetSize: MaterialTapTargetSize.shrinkWrap,
+                minimumSize: const Size(0, _removeDialogButtonHeight),
+                padding: const EdgeInsets.symmetric(horizontal: 12),
+              ),
               onPressed: () => Navigator.pop(dialogContext, true),
               child: Text(l10n.cancelFollowing),
             ),

test/following/following_page_test.dart

@@ -143,6 +143,31 @@ void main() {
     await tester.tap(find.byKey(const Key('following-cancel-follow')));
     await tester.pumpAndSettle();
     expect(find.text('Unfollow the selected dramas?'), findsOneWidget);
+    final dialog = tester.widget<AlertDialog>(find.byType(AlertDialog));
+    expect(dialog.contentPadding, const EdgeInsets.all(20));
+    expect(dialog.actionsPadding, const EdgeInsets.fromLTRB(20, 0, 20, 20));
+    expect(
+      tester
+          .getSize(
+            find.descendant(
+              of: find.byType(AlertDialog),
+              matching: find.byType(TextButton),
+            ),
+          )
+          .height,
+      32,
+    );
+    expect(
+      tester
+          .getSize(
+            find.descendant(
+              of: find.byType(AlertDialog),
+              matching: find.byType(FilledButton),
+            ),
+          )
+          .height,
+      32,
+    );
     await tester.tap(
       find.descendant(
         of: find.byType(AlertDialog),