style(undo-log): apply dart format to email tile mapper

`dart format --set-exit-if-changed` is part of CI's check pipeline.
Collapse the now-fitting `_EmailTile` call back onto one line so it
matches the formatter output.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lib/ui/screens/undo_log_detail_screen.dart

@@ -95,8 +95,7 @@ class UndoLogDetailScreen extends ConsumerWidget {
               ),
             ),
           ...action.originalEmails.map(
-            (email) =>
-                _EmailTile(email: email, accountId: action.accountId),
+            (email) => _EmailTile(email: email, accountId: action.accountId),
           ),
         ],
       ),