* fix: gracefully fall back to role/name lookup when backend_node_id is stale
When the DOM changes between snapshot and click (common with SPAs and
dynamic UIs), the stored backend_node_id becomes invalid. Previously,
DOM.getBoxModel and DOM.resolveNode failures propagated as hard errors,
bypassing the role/name fallback path entirely. Now these failures are
caught and the code falls through to a JS-based element lookup.
Also adds resolve_object_id_by_role_name so that resolve_element_object_id
has a fallback for ref-based lookups (previously it had none), and
improves the role matching JS to correctly map implicit ARIA roles
(e.g. <input type="submit"> → "button", <a href> → "link").
Closes#805
* test: add e2e regression test for stale ref click fallback (#805)
Verifies that clicking a ref whose backend_node_id has become stale
(because the DOM was replaced by JavaScript) falls back to role/name
lookup instead of failing with "Could not compute box model".
* fix: use accessibility tree for stale ref fallback instead of JS heuristic
Replace the hand-rolled JS role/name matching (getImplicitRole,
getAccessibleName) with a re-query of Accessibility.getFullAXTree —
the same data source that built the ref map during snapshot. This
guarantees role/name matching is identical to what was stored,
preventing silent wrong-element clicks from name computation
divergence (e.g. aria-labelledby, <label for>, alt text).
Matches v0.19.0 (Playwright) behavior where getByRole always
re-queried the live accessibility tree.
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Co-authored-by: ctate <366502+ctate@users.noreply.github.com>
