- Extract ContentLanguageOption into @/types and use it for availableContentLanguages
across BrandForm, BrandTab, Brand, Create, and the LanguagePicker options, so the
englishName field that drives search is visible to TypeScript instead of being
dropped silently by the pass-through prop types.
- Add BrandAnalyzerTest: assert the language schema enum equals the full 15-language
set (guards against it shrinking back to a hardcoded subset behind ::fake()) and
that instructions() lists every code.
- Isolate the "LLM language wins" autofill test by declaring the page as `en` while
the LLM returns `de`, so it actually proves mergeLlm precedence instead of both
paths agreeing.
- Cover SetLocale's cookie side effect: the default locale cookie is set on an
invalid/absent cookie and left untouched for a valid locale.
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