fix: put copyright and student notice on same line in footer

Moved "Site étudiant" to the same line as the copyright text instead of
being on a separate line. Both are now displayed inline for a more compact
footer design.

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

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

components/Footer.tsx

@@ -186,12 +186,9 @@ export default function Footer() {
       {/* Bottom Bar */}
       <div className="border-t border-white/10">
         <div className="container mx-auto px-4 py-6">
-          <div className="flex flex-col items-center justify-center gap-2 text-sm">
+          <div className="flex items-center justify-center text-sm">
             <p className="text-white/80">
-              © {currentYear} Thé Tip Top. Tous droits réservés.
-            </p>
-            <p className="text-white/60 text-xs">
-              Site étudiant
+              © {currentYear} Thé Tip Top. Tous droits réservés. <span className="text-white/60 text-xs">Site étudiant</span>
             </p>
           </div>
         </div>