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.

client/src/pages/__tests__/Workspace.test.tsx

@@ -732,7 +732,7 @@ describe("split panes", () => {
     expect(shownPanes()).toEqual(["pane-0", "pane-1", "pane-2", "pane-3"]);
     await ctrlClick(screen.getByTestId("console-tab-4"));
     expect(shownPanes()).toEqual(["pane-4"]);
-    expect(screen.getByTestId("console-tab-0-1-2-3")).toBeInTheDocument();
+    expect(screen.getByTestId("console-tab-0-3-1-2")).toBeInTheDocument();
     expect(screen.getByTestId("console-tab-4")).toHaveAttribute("aria-selected", "true");
   });