feat: Complete Spanish, French, Portuguese, Chinese localization and add German/Italian support

- Updated all Spanish (es) translation files with comprehensive translations for tracking, AI, family, insights, children, and settings pages
- Updated French (fr), Portuguese (pt), and Chinese (zh) translations to match English structure
- Added German (de) and Italian (it) language support with complete translation files
- Fixed medicine tracker route from /track/medication to /track/medicine
- Updated i18n config to support 7 languages: en, es, fr, pt, zh, de, it
- All tracking pages now fully localized: sleep, feeding, diaper, medicine, activity
- AI assistant interface fully translated with thinking messages and suggested questions
- Family management and insights pages now support all languages

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

maternal-web/locales/fr/dashboard.json

@@ -1,7 +1,7 @@
 {
-  "welcomeBack": "Bon retour",
-  "welcomeBackWithName": "Bon retour, {{name}}!",
-  "subtitle": "Suivez les activités de votre enfant et obtenez des informations alimentées par l'IA",
+  "welcomeBack": "Bon Retour",
+  "welcomeBackWithName": "Bon retour, {{name}} !",
+  "subtitle": "Suivez les activités de votre enfant et obtenez des aperçus alimentés par l'IA",
   "quickActions": {
     "title": "Actions Rapides",
     "feeding": "Alimentation",
@@ -27,4 +27,4 @@
     "napTime": "Heure de sieste dans {{minutes}} minutes",
     "basedOnPatterns": "Basé sur les habitudes de sommeil de votre enfant"
   }
-}
+}