browser_snapshot drops the entire tree when an ancestor AX node is ignored (returns only RootWebArea)

[ebysofyan]

Problem

walkAXTree (src/lib/snapshot.ts:35) returns null for nodes where ignored && !name:

if (ignored && !name) return null;

Chromium routinely emits ignored wrapper nodes — on the page below, Accessibility.getFullAXTree returns a root (RootWebArea) whose single child is { role: "none", ignored: true, name: undefined }. The walk returns null for that child, so the root gets no children and browser_snapshot renders only:

[1] RootWebArea "<title>"

browser_click / browser_fill then have no UIDs to work with, making the plugin unusable on affected pages.

Reproduction

Live Next.js application page (Chrome/Brave 153, macOS):

Step	Result
Accessibility.getFullAXTree via raw CDP	436 nodes, 1 root, root has 1 child (ignored: true)
browser_snapshot (current main)	1 node ([1] RootWebArea …)
walkAXTree after traversing through ignored nodes	436 nodes reachable, full tree rendered

Note the existing collapse rule at src/lib/snapshot.ts:48 already passes through unnamed generic/none nodes — ignored wrappers just aren't handled the same way.

Suggested fix

Traverse through ignored wrapper nodes instead of dropping the subtree: return the walked children (collapse when there is exactly one, otherwise keep a pass-through node), consistent with the existing generic/none collapse.

Assignment

Fix is ready — please assign this to me (@ebysofyan) and I'll open a PR. Thanks!