fix: add /design prefix to footer Foundations links

- Fix footer Foundations links to include /design prefix for basePath compatibility
- Change /#section to /design/#section for all Foundations links
- Ensures footer Foundations links work correctly in production
- Maintains consistency with other footer links that already use /design prefix
- Resolves issue where footer Foundations links were missing basePath

Author: mmaxence

src/components/layout/Footer.tsx

@@ -11,11 +11,11 @@ const Footer = () => {
 
   const footerLinks = {
     'Foundations': [
-      { name: t('footer.foundations.mission'), href: '/#mission-vision' },
-      { name: t('footer.foundations.philosophy'), href: '/#philosophy' },
-      { name: t('footer.foundations.values'), href: '/#values' },
-      { name: t('footer.foundations.team'), href: '/#team' },
-      { name: t('footer.foundations.tools'), href: '/#tools' },
+      { name: t('footer.foundations.mission'), href: '/design/#mission-vision' },
+      { name: t('footer.foundations.philosophy'), href: '/design/#philosophy' },
+      { name: t('footer.foundations.values'), href: '/design/#values' },
+      { name: t('footer.foundations.team'), href: '/design/#team' },
+      { name: t('footer.foundations.tools'), href: '/design/#tools' },
     ],
     'Brand': [
       { name: t('footer.brand.principles'), href: '/design/brand#principles' },