Rendering <head dangerouslySetInnerHTML={headCode}> in the App Router root
layout let the manual <head> overwrite the React-hoisted <link rel=stylesheet>
during hydration — all Tailwind styles dropped for real users once JS ran
(headless snapshots taken before hydration looked fine). headCode held the
Yandex.Metrika snippet. Replace with HtmlInjector client component that appends
the code through the DOM post-hydration, recreating <script> nodes so they run.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
