[zatanz]

Accessibility and current-patch editorial repair on the existing 745-item checklist.

• Unchecked item checkboxes no longer inaccurately announce Completed. The accessible name is action-specific in both Thai/English: Mark as collected when unchecked, Unmark collected when checked.
• After a manual mark and full list re-render, keyboard focus returns to the corresponding visible input, rather than disappearing. This never auto-marks any item.
• Correct stale 3.30 assertions in visible 3.29 guide/popup/data-disclosure text (30 string occurrences) to present historical-source uncertainty for the currently requested 3.29 verification; the optional patch dropdown is unchanged and 3.30 certification remains intentionally deferred.
• Extend real Chromium smoke tests for unchecked/checked names, preserved keyboard focus, and current-patch copy. Static validate unchanged; no IDs, quest ordering, localStorage schema or backup format modified.

Merge only after exact-head validation and browser smoke both pass.