* fix: promote hidden radio/checkbox inputs in snapshot refs (#1024)
When a <label> wraps a display:none <input type="radio">, Chrome
excludes the input from the accessibility tree entirely. The label
appears as role="LabelText" with an empty name, making it impossible
for AI agents to identify radio buttons via data.refs.
Detect hidden radio/checkbox inputs during cursor-interactive scanning
and promote their parent LabelText/generic nodes to the correct role
with proper name and checked state.
- Add HiddenInputKind enum to validate input types at parse boundary
- Extend cursor-interactive JS to detect hidden inputs inside elements
- Extract promote_hidden_inputs() for testable role promotion logic
- Add unit tests for promotion, name preservation, and skip conditions
* style: apply cargo fmt
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Co-authored-by: hyunjinee <leehj0110@kakao.com>
