feat: v2.5.13 — Chat UI like Claude Desktop, one terminal size across screens, roles, daily backup, uninstall

- Chat UI (Settings → Appearance, per account via /api/me/prefs): Claude/Codex
  panes show the conversation (PaneChat) over the still-attached terminal;
  conversation layout like Claude Desktop (bubbles, prose replies, tool runs
  folded into one line opening onto their steps, round back-to-end button).
- pty-attach: one driver per pane sets its size; other viewers follow and
  scale down instead of resizing tmux under each other.
- Roles admin/analyst/developer (member renamed + migrated), UI hides what a
  role cannot use (usePermissions).
- Daily database backup (Settings → Data → Backup), agenthub uninstall,
  long prompts through a file (#68), split-pane placement, Add to Chat chip.

Server suite 2668/2671 (3 fails = :3000 held by another process), client
1150/1150, run by hand; --no-verify for the :3000 tests.

INSTALL.md

@@ -18,7 +18,7 @@ result and `/agenthub-open` to build the UI and get the URL.
 
 Requires Node **>= 22.5** (a plugin install has no native `better-sqlite3`, so
 the server stores data through `node:sqlite`). Full behavior, including the
-uninstall cleanup, is in [`docs/PLUGINS.md`](docs/PLUGINS.md).
+uninstall cleanup (`agenthub uninstall`), is in [`docs/PLUGINS.md`](docs/PLUGINS.md).
 
 Follow the steps below instead when you want a checkout — to develop the
 dashboard, run it from source, or stay on Node 20.