fix: PromptBus wrapper-recapture crash + TUI auto-cancel (#136) - #145

…e wrapper as original (#136)

- Added unwrapPristine() to ctx-ui-originals: walks wrapper chain through
  __pristineOriginal stash (carried on the wrapper itself), never stores a
  PromptBus wrapper as an original. Back-fills stash on recovery so future
  captures in fresh vm contexts unwrap directly.
- Added __pristineOriginal stashes on all bridge.ts wrappers (select, input,
  confirm, editor, notify) so the true native is reachable even when the
  process-parked WeakMap misses (isolated extension vm contexts).
- Added hasComponentClaim() to PromptBus so the TUI adapter can detect when
  the dashboard is rendering the prompt and suppress an auto-cancel from a
  no-op native method (RPC-mode stub that returns undefined immediately).
- TUI adapter present(): when the native ui method returns undefined AND the
  bus has a dashboard component claim, let the dashboard handle the prompt
  instead of winning the race with a spurious cancellation.
- Updated regression tests; added explicit coverage for unwrap recovery and
  never-store-wrapper semantics.