fix: there can only ever be one root layout, and it should always contains html and body tags

apps/scandic-web/app/[lang]/(partner)/layout.tsx

@@ -19,6 +19,7 @@ import GTMScript from "@/components/TrackingSDK/GTMScript"
 import RouterTracking from "@/components/TrackingSDK/RouterTracking"
 import { getIntl } from "@/i18n"
 import ServerIntlProvider from "@/i18n/Provider"
+import { setLang } from "@/i18n/serverContext"
 
 import type { LangParams, LayoutArgs } from "@/types/params"
 
@@ -29,6 +30,7 @@ export default async function RootLayout({
   if (!env.SAS_ENABLED) {
     return null
   }
+  setLang(params.lang)
 
   const { defaultLocale, locale, messages } = await getIntl()