fix(userbot): add missing safone.py imports, apply ruff --unsafe-fixes

- Add missing aiohttp, PIL, BytesIO imports to safone.py (F821 runtime bugs)
- Apply ruff --unsafe-fixes (27 fixes): ternary operators, .get() patterns,
  contextlib.suppress, enumerate(), collapsible if/else, remove .keys()

userbot/modules/pdf2md.py

@@ -28,7 +28,7 @@ async def pdf2md(client: Client, message: Message):
     if not message.reply_to_message.document:
         await message.edit('Reply to a pdf file')
         return
-    if not message.reply_to_message.document.mime_type == 'application/pdf':
+    if message.reply_to_message.document.mime_type != 'application/pdf':
         await message.edit('Reply to a pdf file')
         return
     if gemini_key == '':