Rename .env to env in backup for visibility

- Save .env file as 'env' in backup zip to make it visible without showing hidden files
- Users need to rename it back to .env when restoring

Author: zZedix

panel/app/telegram_bot.py

@@ -517,7 +517,8 @@ async def create_backup(self) -> Optional[str]:
                     break
 
             if env_file:
-                shutil.copy2(env_file, backup_dir / ".env")
+                # Use 'env' instead of '.env' to make it visible (not hidden)
+                shutil.copy2(env_file, backup_dir / "env")
                 logger.info(f"Backed up .env from: {env_file}")
 
             # Find and backup docker-compose.yml