fix(desktop-browser): refuse reissued earlier refs and recover from uncommitted ref reuse - #9959

Summary

Follow-up hardening for #9953 before it reaches main:

• A ref from an earlier snapshot is refused once a later snapshot gave its element a new ref (a recycled virtual row's "Archive" button no longer lets the old ref act on the new row)
• When the page reuses an id from a capture this scope never committed (an aborted or timed-out snapshot), the snapshot is recaptured once with the page's issued refs forgotten, instead of the frame staying unreadable or the tab failing every snapshot until it navigates
• An icon-only control no longer counts as "revealed content" when its label grows, and the text hash is only computed when a name actually changed

Type of Change

• Bug fix

Testing

• Red/green unit tests: earlier ref after reissue, uncommitted reuse recapture (driver), icon-only label growth; 546 browser-agent tests pass, desktop type-check clean
• Production-loop benchmark ablation to follow in a comment

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)