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/page.tsx

@@ -165,7 +165,9 @@ export default function HomePage() {
                     aria-label={t('quickActions.navigateTo', { action: action.label })}
                     sx={{
                       p: 3,
-                      height: '100%',
+                      height: '140px', // Fixed height for consistency
+                      minHeight: '140px', // Ensure minimum height
+                      width: '100%', // Full width of grid container
                       display: 'flex',
                       flexDirection: 'column',
                       alignItems: 'center',
@@ -225,8 +227,10 @@ export default function HomePage() {
                         display: 'flex',
                         flexDirection: 'column',
                         alignItems: 'center',
-                        height: '100%',
-                        minHeight: '120px'
+                        justifyContent: 'center',
+                        height: '120px', // Fixed height for consistency
+                        minHeight: '120px',
+                        width: '100%'
                       }}
                     >
                       <Restaurant sx={{ fontSize: 32, color: 'primary.main', mb: 1 }} aria-hidden="true" />
@@ -245,8 +249,10 @@ export default function HomePage() {
                         display: 'flex',
                         flexDirection: 'column',
                         alignItems: 'center',
-                        height: '100%',
-                        minHeight: '120px'
+                        justifyContent: 'center',
+                        height: '120px', // Fixed height for consistency
+                        minHeight: '120px',
+                        width: '100%'
                       }}
                     >
                       <Hotel sx={{ fontSize: 32, color: 'info.main', mb: 1 }} aria-hidden="true" />
@@ -267,8 +273,10 @@ export default function HomePage() {
                         display: 'flex',
                         flexDirection: 'column',
                         alignItems: 'center',
-                        height: '100%',
-                        minHeight: '120px'
+                        justifyContent: 'center',
+                        height: '120px', // Fixed height for consistency
+                        minHeight: '120px',
+                        width: '100%'
                       }}
                     >
                       <BabyChangingStation sx={{ fontSize: 32, color: 'warning.main', mb: 1 }} aria-hidden="true" />
@@ -287,8 +295,10 @@ export default function HomePage() {
                         display: 'flex',
                         flexDirection: 'column',
                         alignItems: 'center',
-                        height: '100%',
-                        minHeight: '120px'
+                        justifyContent: 'center',
+                        height: '120px', // Fixed height for consistency
+                        minHeight: '120px',
+                        width: '100%'
                       }}
                     >
                       <MedicalServices sx={{ fontSize: 32, color: 'error.main', mb: 1 }} aria-hidden="true" />