- _split_message: return empty list for empty/None content instead
of a list with one empty string (Discord rejects empty content)
- _split_message: use pos <= 0 fallback to prevent empty chunks
when content starts with a newline or space
- _send_payload: return bool to indicate success/failure
- send: abort remaining chunks when a chunk fails to send,
preventing partial/corrupted message delivery
Discord's API rejects messages longer than 2000 characters with HTTP 400.
Previously, long agent responses were silently lost after retries exhausted.
Adds _split_message() (matching Telegram's approach) to chunk content at
line boundaries before sending. Only the first chunk carries the reply
reference. Retry logic extracted to _send_payload() for reuse across chunks.
Closes#898
- Implement Discord channel functionality with websocket integration.
- Update configuration schema to include Discord settings.
- Enhance README with setup instructions for Discord integration.
- Modify channel manager to initialize Discord channel if enabled.
- Update CLI status command to display Discord channel status.
