Improved the settings page by removing individual save buttons from each
preference component and adding unified save buttons per section:
## Changes Made
### Component Updates
- **TimeZoneSelector**: Converted to controlled component with value/onChange props
* Removed internal state management and save button
* Removed success/error alerts (now handled by parent)
* Added auto-detect as simple button without save
- **TimeFormatSelector**: Converted to controlled component with value/onChange props
* Removed internal state management and save button
* Removed success/error alerts (now handled by parent)
* Simplified to just radio buttons with preview
### Settings Page Improvements
- Added timezone and timeFormat to local state
- Created separate save handlers:
* `handleSaveProfile` - for name/email changes
* `handleSavePreferences` - for timezone and time format
- Three clear sections with dedicated save buttons:
1. **Profile Information** → "Save Profile" button
2. **Preferences** (Language, Units, Timezone, Time Format) → "Save Preferences" button
3. **Notifications** → "Save Notification Settings" button
### User Experience Benefits
- Clearer separation between different types of settings
- Single save action per logical section instead of multiple buttons
- Consistent save pattern across all settings cards
- Reduced visual clutter with fewer buttons on page
- Better organization: related settings grouped with one save action
Files changed: 3 files (TimeZoneSelector, TimeFormatSelector, settings page)
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Co-Authored-By: Claude <noreply@anthropic.com>
Implemented comprehensive frontend localization infrastructure supporting
5 languages (English, Spanish, French, Portuguese, Chinese) with measurement
unit preferences (Metric/Imperial). This lays the foundation for international
user support.
**Core Infrastructure:**
- Installed i18next, react-i18next, i18next-browser-languagedetector
- Created I18nProvider component integrated into app layout
- Configured i18next with language detection and localStorage persistence
- Created 35 translation files (5 languages × 7 namespaces)
**Translation Namespaces:**
- common: App-wide UI elements, navigation, actions
- tracking: Activity tracking (feeding, sleep, diaper, milestones)
- ai: AI assistant chat interface
- auth: Authentication flows (login, signup, password reset)
- settings: Settings and preferences
- onboarding: Onboarding flow
- errors: Error messages and validation
**Custom Hooks:**
- useTranslation: Type-safe translation wrapper
- useLocale: Language and measurement system management
- useFormatting: Date, time, number, and unit formatting
**Measurement Unit Support:**
- Created unit conversion utilities (weight, height, temperature, volume)
- Metric: kg, cm, °C, ml
- Imperial: lb, in, °F, oz
- Bidirectional conversion functions
**UI Components:**
- LanguageSelector: Dropdown to change app language
- MeasurementUnitSelector: Toggle between Metric/Imperial
- Integrated both into Settings page Preferences section
**Next Steps (Remaining):**
- Add measurement preferences to backend user schema
- Create onboarding flow with language/measurement selection
- Apply translations to existing components (dashboard, tracking forms)
- Implement multi-language AI responses
- Add professional translations (currently using basic translations)
**File Highlights:**
- lib/i18n/config.ts: i18next configuration
- hooks/useFormatting.ts: Formatting utilities with locale support
- lib/utils/unitConversion.ts: Unit conversion logic
- components/settings/*Selector.tsx: Language and measurement selectors
- locales/*/: Translation files for 5 languages
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
