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/settings/page.tsx

@@ -129,7 +129,7 @@ export default function SettingsPage() {
         animate={{ opacity: 1, y: 0 }}
         transition={{ duration: 0.4 }}
       >
-        <Card sx={{ mb: 3 }}>
+        <Card sx={{ mb: 3, minHeight: '120px' }}>
           <CardContent>
             <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
               {t('profile.title')}
@@ -165,7 +165,7 @@ export default function SettingsPage() {
         animate={{ opacity: 1, y: 0 }}
         transition={{ duration: 0.4, delay: 0.05 }}
       >
-        <Card sx={{ mb: 3 }}>
+        <Card sx={{ mb: 3, minHeight: '120px' }}>
           <CardContent>
             <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
               {t('preferences.title')}
@@ -192,7 +192,7 @@ export default function SettingsPage() {
         animate={{ opacity: 1, y: 0 }}
         transition={{ duration: 0.4, delay: 0.1 }}
       >
-        <Card sx={{ mb: 3 }}>
+        <Card sx={{ mb: 3, minHeight: '120px' }}>
           <CardContent>
             <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
               {t('notifications.title')}
@@ -229,7 +229,7 @@ export default function SettingsPage() {
         animate={{ opacity: 1, y: 0 }}
         transition={{ duration: 0.4, delay: 0.2 }}
       >
-        <Card sx={{ mb: 3 }}>
+        <Card sx={{ mb: 3, minHeight: '120px' }}>
           <CardContent>
             <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
               {t('appearance.title')}