Kenneth Lien bfed4635f5 feat(imessage): port permission-relay + lifecycle fixes from telegram ...

Brings the imessage channel to parity with recent telegram/discord
hardening:

- Permission-relay capability: declare claude/channel/permission,
  handle inbound permission_request notifications by fanning out to
  allowlisted DM chats + self-chat, intercept "yes/no <id>" replies
  after the gate check and emit structured permission events instead
  of relaying as chat. Groups excluded per single-user-mode policy.
- Global unhandledRejection/uncaughtException handlers so the server
  logs instead of dying silently.
- IMESSAGE_STATE_DIR env override for the state directory.
- .unref() on both setInterval timers so they don't block shutdown.
- stdin EOF / SIGTERM / SIGINT shutdown handler that closes chat.db
  and exits cleanly instead of leaving a zombie poll loop.

Adds zod as a direct dep (already transitively present via the MCP SDK)
for the notification handler schema.

2026-03-23 20:10:34 -07:00

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