v1.12.0

• Embedded hosts can compose Tasks' list and detail regions into their own
  focus rings. The public pkg/tui API now exposes stable spatial-focus IDs,
  the exact rectangles from the layout Tasks renders and hit-tests, the current
  region, direct focus control, and TabOwnsFocus. The README documents the
  Sidecar capability check and the boundary between spatial focus and Tasks'
  existing interaction contexts.
• Inputs and overlays keep ownership of Tab, including field modals, while
  passive list/detail and response views can yield it to an outer host. Compact
  layouts expose only positive rendered focus stops; hidden, unknown, or
  input-covered targets refuse direct focus without changing selection. Keys
  and clicks follow the same spatial focus, and project-detail panels retain
  list command routing so task-detail actions cannot run against a project row.