Refactor Footer component: implement openCookieSettings function to replace placeholder logic for cookie settings button.

lawfirm-demos/demo-2/components/Footer.tsx

@@ -3,6 +3,10 @@
 import Link from "next/link";
 
 export default function Footer() {
+    const openCookieSettings = () => {
+        window.dispatchEvent(new Event('show-cookie-banner'));
+    };
+
     return (
         <footer className="bg-white dark:bg-gray-950 border-t border-gray-200 dark:border-gray-800 px-4 py-8 text-sm">
             <div className="max-w-6xl mx-auto flex flex-col md:flex-row items-center justify-between gap-4">
@@ -17,13 +21,7 @@ export default function Footer() {
                     <Link href="/datenschutz" className="hover:underline">
                         Datenschutz
                     </Link>
-                    <button
-                        onClick={() => {
-                            // TODO: Cookie Modal öffnen
-                            alert("Cookie-Einstellungen öffnen (noch nicht implementiert)");
-                        }}
-                        className="hover:underline"
-                    >
+                    <button onClick={openCookieSettings} className="hover:underline">
                         Cookie-Einstellungen
                     </button>
                 </div>