Point links at the new git host

GitHub went dark with the account suspension on 2026-09-20 and GitLab was
retired on 2026-09-22, so links to either no longer resolve. Repository,
file, release and download links now point at git.coffeylabs.org, images
at registry.coffeylabs.org, and old GitHub issue and pull request links at
coffey-labs/ihasmail-github-archive, whose numbers match GitHub's.

web/src/store/contacts.ts

@@ -26,7 +26,7 @@ import { useMail } from "./mail";
  * `ContactCard/set` down they are the same" was always claiming and is now
  * true of.
  *
- * [#173]: https://github.com/Coffey-Labs/ihasmail/issues/173
+ * [#173]: https://git.coffeylabs.org/coffey-labs/ihasmail-github-archive/issues/173
  */
 /**
  * The UIDs an address book already holds.