microlinkhq / html-get / 27564097415 / 1

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fix: avoid shadow DOM false positives and preserve fetch on retry failure (#257)

The auto-prerender upgrade treated any hyphenated tag as a custom element,
so inline SVG tags like font-face triggered an unnecessary prerender retry.

When that retry failed (browser blocked and the parallel fetch also errored),
the successful fetch HTML was replaced with an empty string.

Exclude hyphenated tags inside svg/math trees, and only adopt the prerender
result when it actually returned content.

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: kikohumanbeatbox <kikohumanbeatbox@gmail.com>

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