MOTD, numerics, connection status, errors, services/server notices and all
/whois output now go to a "Server messages" box on the main screen instead of
being dropped or opening PM windows. /whois works from any channel window.
Notices to us are keyed by sender (no more window named after our own nick).
Buffer updates go through a single ordered queue, matching wIRC-desktop.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KWfhTzK5F5kbybEnps3VFe
