Disable keyboard buttons completely in group chats

- Added getReplyMarkupForChat utility to explicitly remove keyboards in groups
- Updated all group chat messages to remove keyboards
- Prevents keyboards from being re-enabled when users press buttons
- Ensures keyboards are disabled for all users in group chats

telegram_bot/src/handlers/help.ts

@@ -1,6 +1,6 @@
 import TelegramBot from 'node-telegram-bot-api';
 import { logUserAction } from '../services/logger';
-import { getMainMenuKeyboard } from '../utils/keyboards';
+import { getMainMenuKeyboard, getReplyMarkupForChat } from '../utils/keyboards';
 import { messages } from '../messages';
 
 /**
@@ -22,6 +22,7 @@ export async function handleHelpCommand(
     // Show group-specific help with admin commands
     await bot.sendMessage(chatId, messages.help.groupMessage, {
       parse_mode: 'Markdown',
+      reply_markup: getReplyMarkupForChat(chatId),
     });
   } else {
     // Show user help in DM