fix: tune webapp visual and fix some errors

bot/middlewares/db_session.py

@@ -2,9 +2,12 @@ import logging
 from typing import Callable, Dict, Any, Awaitable
 
 from aiogram import BaseMiddleware
+from aiogram.exceptions import TelegramBadRequest
 from aiogram.types import Update
 from sqlalchemy.orm import sessionmaker
 
+from bot.utils.callback_answer import is_expired_callback_answer_error
+
 
 class DBSessionMiddleware(BaseMiddleware):
 
@@ -31,6 +34,18 @@ class DBSessionMiddleware(BaseMiddleware):
 
                 await session.commit()
                 return result
+            except TelegramBadRequest as error:
+                await session.rollback()
+                if is_expired_callback_answer_error(error):
+                    logging.info(
+                        "DBSessionMiddleware: expired callback answer ignored; "
+                        "session rolled back for the interrupted update."
+                    )
+                    return None
+                logging.error(
+                    "DBSessionMiddleware: Exception caused rollback.", exc_info=True
+                )
+                raise
             except Exception:
                 await session.rollback()
                 logging.error(