Fix incidents_export file delivery

handlers/system.py

@@ -1,7 +1,7 @@
 import asyncio
 import os
 from aiogram import F
-from aiogram.types import Message, CallbackQuery, InlineKeyboardMarkup, InlineKeyboardButton
+from aiogram.types import Message, CallbackQuery, InlineKeyboardMarkup, InlineKeyboardButton, InputFile
 from app import dp, cfg
 from auth import is_admin_msg
 from keyboards import (
@@ -440,7 +440,7 @@ async def incidents_export(msg: Message):
         bio.name = f"incidents_{hours}h.csv"
     summary = f"📤 Incidents export ({hours}h): {len(data)} rows, format {fmt}"
     await msg.answer(summary)
-    await msg.answer_document(document=bio)
+    await msg.answer_document(document=InputFile(bio, filename=bio.name))
 
 
 @dp.message(F.text == "🔒 SSL")