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/components/__tests__/WorkspaceTree.test.tsx

@@ -178,6 +178,10 @@ describe("WorkspaceTree", () => {
     expect(api.sessions.list).toHaveBeenLastCalledWith({ lane: 1, archived: false, limit: 9 });
     await screen.findByText("Session 8");
     expect(screen.queryByTestId("workspace-sessions-more-1")).toBeNull();
+    await user.click(screen.getByTestId("workspace-sessions-less-1"));
+    expect(api.sessions.list).toHaveBeenLastCalledWith({ lane: 1, archived: false, limit: 6 });
+    expect(await screen.findByTestId("workspace-sessions-more-1")).toBeInTheDocument();
+    expect(screen.queryByTestId("workspace-sessions-less-1")).toBeNull();
   });
 
   it("renames a session on double-click + Enter, and archives one from its row", async () => {