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>

client/src/i18n/locales/en/users.json

@@ -209,7 +209,7 @@
     "title": "Members' tmux",
     "description": "Each member's own tmux server keeps the version it started with until its last pane closes. Installed: tmux {{version}}.",
     "refresh": "Refresh",
-    "notMatched": "Run `sudo agenthub server install-system` once: until then an older member server is asked with the installed tmux, which can leave it stuck at 100% CPU.",
+    "notMatched": "Run `agenthub server install-system` once: until then an older member server is asked with the installed tmux, which can leave it stuck at 100% CPU.",
     "empty": "No member has a tmux server running.",
     "user": "User",
     "version": "tmux",