fix: improve email link styling in terms and privacy pages

- Replace <a> tags with Next.js Link component for email links
- Update translation tags from <a> to <emailLink> in both en and hr
- Add no-underline class to prevent default prose underline
- Add hover:underline to show underline only on hover
- Apply consistent styling across both terms-of-service and privacy-policy pages

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

messages/en.json

@@ -328,7 +328,7 @@
     },
     "section-11": {
       "heading": "11. Contact Us",
-      "content": "If you have any questions about these Terms, please contact us at <a href=\"mail:support@rezije.app\">support@rezije.app</a>."
+      "content": "If you have any questions about these Terms, please contact us at <emailLink>support@rezije.app</emailLink>."
     }
   },
   "privacy-policy-page": {
@@ -373,7 +373,7 @@
     },
     "section-10": {
       "heading": "10. Contact Us",
-      "content": "If you have any questions about this Privacy Policy, please contact us at <a href=\"mail:support@rezije.app\">support@rezije.app</a>."
+      "content": "If you have any questions about this Privacy Policy, please contact us at <emailLink>support@rezije.app</emailLink>."
     },
     "section-11": {
       "heading": "11. Consent",