* fix(mobile): surface worktree catalog failures instead of showing 0 worktrees (STA-3123)
A connected host whose worktree.ps request fails now shows an explicit
catalog-failure state (with the RPC error code) on the host page, and
'Worktree list unavailable' on the home host card, instead of silently
rendering as a healthy host with zero workspaces.
* fix(mobile): mark cached worktree catalogs unavailable