style: Format app.py with ruff

Auto-formatted to fix code style issues.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: wesm

moneyflow/app.py

@@ -1358,6 +1358,7 @@ async def _delete_transaction(self) -> None:
             saved_position = self._save_table_position()
 
             from .logging_config import get_logger
+
             logger = get_logger(__name__)
 
             success_count = 0