Resolves the remaining review threads:
- Reset to auto-detect across all three layers (Greptile): store passes
language:null through as null-as-delete; dashboard gains an Auto option
(clearLanguage + hasExplicitChoice in useLanguage, re-detects from
navigator, syncs cross-tab); CLI accepts 'fn settings set language auto'.
Catalog keys added for all five locales; tests at every layer.
- CLI i18n test singleton: afterEach locale restore so zh-CN/fr switches
can't leak across cases (CodeRabbit nitpick)
- useLocaleFormat memoized per locale for stable formatter identities
(CodeRabbit nitpick)
- settings-reference.md documents the auto reset path
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
- 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>
Add useLanguage (three-tier persistence mirroring useTheme: localStorage cache
+ server GlobalSettings write-through + hydrate-on-mount, local choice wins)
and a LanguageSelector rendered in the Settings Appearance section. Switching
applies in place via i18n.changeLanguage — no reload, so unsaved state and
in-flight agent views survive. Endonyms name each language in its own script.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
