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/es/children.json

@@ -13,8 +13,29 @@
     "female": "Femenino",
     "other": "Otro"
   },
+  "dialog": {
+    "name": "Nombre",
+    "birthDate": "Fecha de Nacimiento",
+    "gender": "Género",
+    "photoUrl": "URL de Foto (Opcional)",
+    "photoPlaceholder": "https://example.com/photo.jpg",
+    "cancel": "Cancelar",
+    "add": "Agregar",
+    "update": "Actualizar",
+    "saving": "Guardando...",
+    "delete": "Eliminar",
+    "deleting": "Eliminando...",
+    "confirmDelete": "Confirmar Eliminación",
+    "confirmDeleteMessage": "¿Estás seguro de que quieres eliminar",
+    "confirmDeleteWarning": "Esta acción no se puede deshacer. Todos los datos asociados serán eliminados permanentemente.",
+    "validation": {
+      "nameRequired": "Por favor ingresa un nombre",
+      "birthDateRequired": "Por favor selecciona una fecha de nacimiento",
+      "birthDateFuture": "La fecha de nacimiento no puede estar en el futuro"
+    }
+  },
   "errors": {
-    "noFamily": "No se encontró familia. Por favor completa la incorporación primero.",
+    "noFamily": "No se encontró familia. Por favor completa la configuración inicial primero.",
     "loadFailed": "Error al cargar niños",
     "saveFailed": "Error al guardar niño",
     "deleteFailed": "Error al eliminar niño",
@@ -26,4 +47,4 @@
     "month": "mes",
     "months": "meses"
   }
-}
+}