- Rename mode from 'text' to 'cabinet' (text/text_only/minimal kept as aliases)
- Add build_cabinet_url() for joining MINIAPP_CUSTOM_URL with section paths
- Cabinet main menu now has section-specific buttons: subscription, balance,
referral, support, info — each opens the corresponding cabinet page
- Add CALLBACK_TO_CABINET_PATH mapping for automatic deep-linking from
callback_data to cabinet routes (/subscription, /balance, /referral, etc.)
- Unmapped callback_data gracefully falls back to regular Telegram callbacks
- Add startup validation warning when cabinet mode is active without MINIAPP_CUSTOM_URL
- Update admin broadcast buttons with section-specific routing
- Backward compatible: is_text_main_menu_mode() kept as alias for is_cabinet_mode()
Delete dead Flask-based PAL24 webhook server (app/external/pal24_webhook.py).
PAL24 webhooks already handled by unified FastAPI server on port 8080.
- Remove flask dependency from pyproject.toml and requirements.txt
- Remove PAL24_WEBHOOK_PORT config (unused, FastAPI uses shared port)
- Remove pal24_webhook module reference from log filter
- Update docs: webhook example rewritten from Flask to FastAPI
- Uninstall flask, werkzeug, blinker, itsdangerous
