{"service":"donish-backend","message":"Donish API. Use /health for status.","endpoints":["/health","/auth","/bot","/bot/lookup-user (POST, bot)","/bot/reset-password (POST, bot)","/bot/telegram-webhook (POST, Telegram updates — setWebhook URL here)","/materials (GET paginated: ?limit&offset&q&material_type&english_level)","/materials/extract-preview (POST, JSON pdf_base64)","/materials/:id (GET, DELETE)","/vocab","/vocab/practice","/translate"]}