Add channels.telegram.linkPreview config to control whether link previews
are shown in outbound messages. When set to false, uses Telegram's
link_preview_options.is_disabled to suppress URL previews.
- Add linkPreview to TelegramAccountConfig type
- Add Zod schema validation for linkPreview
- Pass link_preview_options to sendMessage in send.ts and bot/delivery.ts
- Propagate linkPreview config through deliverReplies callers
- Add tests for link preview behavior
Fixes#1675
Co-Authored-By: Claude <noreply@anthropic.com>
- Integrate message_sending hook into Telegram delivery path
- Send text first, then audio as voice message after
- Add /tts_provider command to switch between OpenAI and ElevenLabs
- Implement automatic fallback when primary provider fails
- Use gpt-4o-mini-tts as default OpenAI model
- Add hook integration to route-reply.ts for other channels
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Telegram General topic (id=1) has inconsistent API behavior:
- sendMessage: rejects explicit message_thread_id=1
- sendChatAction: requires message_thread_id=1 for typing to show
Split into two helper functions:
- buildTelegramThreadParams: excludes General topic for messages
- buildTypingThreadParams: includes General topic for typing
