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/pt/common.json

@@ -1,6 +1,6 @@
 {
   "appName": "Maternal",
-  "appDescription": "Assistente de Cuidados Infantis com IA",
+  "appDescription": "Assistente de Cuidados Infantis Alimentado por IA",
   "welcome": "Bem-vindo",
   "loading": "Carregando...",
   "save": "Salvar",
@@ -13,12 +13,12 @@
   "back": "Voltar",
   "next": "Próximo",
   "previous": "Anterior",
-  "finish": "Concluir",
+  "finish": "Finalizar",
   "search": "Pesquisar",
   "filter": "Filtrar",
   "sort": "Ordenar",
   "refresh": "Atualizar",
-  "retry": "Tentar novamente",
+  "retry": "Tentar Novamente",
   "continue": "Continuar",
   "submit": "Enviar",
   "reset": "Redefinir",
@@ -58,13 +58,13 @@
   "navigation": {
     "home": "Início",
     "dashboard": "Painel",
-    "tracking": "Rastreamento",
-    "trackActivity": "Registrar Atividade",
-    "track": "Registrar",
+    "tracking": "Acompanhamento",
+    "trackActivity": "Acompanhar Atividade",
+    "track": "Acompanhar",
     "ai": "Assistente IA",
     "aiChat": "Chat IA",
     "family": "Família",
-    "insights": "Análises",
+    "insights": "Insights",
     "children": "Crianças",
     "settings": "Configurações",
     "logout": "Sair"
@@ -76,4 +76,4 @@
     "offline": "Offline",
     "familyMembersOnline": "{{count}} membros da família online"
   }
-}
+}