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/app/family/page.tsx

@@ -207,7 +207,7 @@ export default function FamilyPage() {
               {/* Family Share Code */}
               {family && (
                 <Grid item xs={12}>
-                  <Card>
+                  <Card sx={{ minHeight: '140px' }}>
                     <CardContent>
                       <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
                         {t('shareCode.title')}
@@ -241,7 +241,7 @@ export default function FamilyPage() {
 
               {/* Family Members */}
               <Grid item xs={12}>
-                <Card>
+                <Card sx={{ minHeight: '200px' }}>
                   <CardContent>
                     <Typography variant="h6" fontWeight="600" gutterBottom sx={{ mb: 3 }}>
                       {t('members.title', { count: members.length })}