Preserve runtime-targeted DOM controls

[chubes4]

Summary

• Thread first-party script DOM selectors into HTML block conversion.
• Treat script-targeted wrappers as preservation signals.
• Avoid dropping runtime-targeted menu toggle controls when normalizing navigation markup.

Verification

• git diff --check
• Attempted homeboy test php-transformer --lab-only --runner homeboy-lab --path /Users/chubes/Developer/blocks-engine@fix-runtime-dom-target-parity-wave2/php-transformer --extension nodejs --ci-job test; Lab reached remote execution but failed before tests because the Homeboy Node extension requires package.json, while php-transformer CI is Composer-based. GitHub Actions will run the real Composer workflow (composer install, composer validate --strict, composer test).

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode with openai/gpt-5.5
• Used for: Diagnosing runtime DOM target parity findings, drafting the selector-preservation fix, and updating contract coverage.