Fix sidebar locale navigation

[brunoamui]

Summary

• Reproduced sidebar locale drop (PT/ES link click sent to EN) using Netlify preview
• Determined client-side navigation was losing locale: Link forced locale={false} and router.push lacked locale option
• Implemented fix: pass current locale to Link and router.push so hrefs and navigation stay localized

Details

• Observed: clicking sidebar items in PT (e.g., ‘Enviar os meios de pagamento…’) navigated to /en/... and . URLs in DOM looked localized initially but client navigation switched to default locale.
• Diagnosis: In @vtexdocs/components/src/components/sidebar-elements/index.tsx the Link used and router.push was called without LANG="en_US.UTF-8"
  LC_COLLATE="en_US.UTF-8"
  LC_CTYPE="en_US.UTF-8"
  LC_MESSAGES="en_US.UTF-8"
  LC_MONETARY="en_US.UTF-8"
  LC_NUMERIC="en_US.UTF-8"
  LC_TIME="en_US.UTF-8"
  LC_ALL=, triggering Next.js default locale fallback.
• Fix: use on the sidebar Link and pass to router.push (keeping href consistent). This preserves /pt or /es during client-side navigation and avoids fallback to EN.

Testing

• Manual: Clicked PT sidebar links (Omnichannel settings -> Como usar o app Carrinho Compartilhável -> Enviar os meios de pagamento...) and confirmed navigation stayed under /pt with .

[github-actions]

This pull request does not contain a valid label. Please add one of the following labels: ['release-no', 'release-auto', 'release-patch', 'release-minor', 'release-major']