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Pass full locale from Accept-Language to ClientDate

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Add detectLocale() that extracts the full locale tag (e.g. "de-DE")
from the request, not just the language. The journal root loader passes
it via LocaleContext so ClientDate renders with the correct locale on
both server and client — no more hardcoded "en-US" fallback.

Also fixes settings page hydration mismatch by using ClientDate for
passkey creation dates instead of inline toLocaleDateString().

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Ullrich Schäfer 2026-03-29 11:46:21 +02:00
parent 79f000fcc5
commit 38ada3bd4f
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5 changed files with 54 additions and 9 deletions
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19
packages/i18n/src/index.ts
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@ -70,4 +70,23 @@ export function detectLanguage(request: Request): SupportedLng {
return "en";
}
/**
* Extract the full locale (e.g. "de-DE") from a request's Accept-Language header.
* Falls back to the supported language (e.g. "en") if no region tag is present.
*/
export function detectLocale(request: Request): string {
const header = request.headers.get("Accept-Language") ?? "";
for (const part of header.split(",")) {
const tag = part.split(";")[0]?.trim();
if (!tag) continue;
const lang = tag.toLowerCase();
for (const supported of supportedLngs) {
if (lang === supported || lang.startsWith(supported + "-")) {
return tag; // preserve original casing (e.g. "de-DE")
}
}
}
return "en";
}
export { i18n };