feat: organizers, meetups UI, Plausible analytics, and migration tooling

- Add organizer model/API, admin and public organizer pages, meetup cards
- Refresh events/home/contact; add calendar dialog and carousel components
- Optional Plausible via NEXT_PUBLIC_PLAUSIBLE_* env vars in root layout
- Prisma migration, seed updates, baseline-and-migrate script

Made-with: Cursor

frontend/components/public/Footer.tsx

@@ -37,6 +37,23 @@ export function Footer() {
         <p className="text-white opacity-50 text-xs sm:text-sm tracking-widest uppercase max-w-[min(100%,22rem)] sm:max-w-md leading-relaxed text-balance">
           &copy; Belgian Bitcoin Embassy.
         </p>
+
+        <div className="max-w-3xl text-white/65 text-xs sm:text-sm leading-relaxed text-left">
+          <h2 className="text-white/75 font-semibold mb-2">Disclaimer</h2>
+          <p>
+            The Belgian Bitcoin Embassy provides information for educational purposes only and
+            does not offer financial, investment, or legal advice. Bitcoin and other
+            cryptocurrencies are subject to high volatility and potential risks. Always conduct
+            your own research and consult a qualified professional before making any financial
+            decisions. The Embassy is not responsible for any losses or damages resulting from the
+            use of this information.
+          </p>
+          <p className="mt-3">
+            Cryptocurrencies may be subject to regulatory changes; ensure compliance with local
+            laws. Remember to practice safe security measures, including the use of secure wallets
+            and private key protection.
+          </p>
+        </div>
       </div>
     </footer>
   );