- Extract a shared normalizeToSupportedLocale helper in @fusion/i18n used by
both the CLI env detection and the dashboard navigator detection
(convertDetectedLanguage), fixing multi-subtag navigator tags (zh-Hans-CN)
and unifying Chinese script resolution.
- Add a cross-tab storage listener to useLanguage so a language change in one
tab propagates to others.
- Dedup the namespace lists into packages/i18n/namespaces.json, consumed by
config.ts and all three build scripts (no more 3-way drift risk).
- Add tests: dashboard i18n/index.ts (document.lang mirror, init non-blocking),
useLanguage concurrent-hydration race + cross-tab adoption,
normalizeToSupportedLocale, namespace-source consistency.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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