* feat(i18n): add Spanish (es-ES) locale
Add complete Spanish translation covering all 930+ keys across
all UI sections: navigation, notebooks, sources, chat, search,
podcasts, transformations, settings, models, API keys, and error messages.
- Create es-ES locale file with full translation
- Register es-ES in locale index with LanguageCode type
- Add Spanish entry to LanguageToggle dropdown
- Add `spanish` key to common section in all existing locales
- Add date-fns Spanish locale for date formatting
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(i18n): use t() function accessor for Spanish dropdown item
Rebased onto main, which migrated i18n from the custom Proxy pattern to
react-i18next's t() function. Updates the new es-ES entry in
LanguageToggle to match the current accessor style so it renders the
translated label at runtime instead of undefined.
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Co-authored-by: chemazener <chemazener@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: Luis Novo <lfnovo@gmail.com>
