chore: v2.8.5 — Trash opens on one folder per user, server setup installs S3

- Files → Trash: ONE sidebar entry. An admin's opens on a folder per user's
  Trash (My Trash first, item counts from GET /api/homes/trash, an unreadable
  one showing its error); a folder opens that user's Trash (path bar
  Trash › user, Up back to the folders). An admin may restore/purge in
  another user's Trash (audited); purging asks first. The merged "All users"
  list is gone from the UI.
- A home's Trash is its user's whole recycle bin (home store + host store,
  items tagged `store`).
- `agenthub server setup` installs one Linux user per account on Linux by
  default (`--no-system` opts out); install-system messages drop `sudo`.
- Settings → Git: the author email suggests <username>@<AGENTHUB_EMAIL_DOMAIN>.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/service-manager.js

@@ -6,7 +6,7 @@
  * a systemd `--user` unit everywhere else (`systemd-service.js`, which reports
  * itself unavailable off Linux). Both export the same API — and so does the
  * third, `systemd-system-service.js`, chosen while the server-mode SYSTEM unit
- * `sudo agenthub server install-system` wrote exists (pure fs check).
+ * `agenthub server install-system` wrote exists (pure fs check).
  * Require THIS module, never one of the three directly.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */