feat: remove FPX, add UK charity persona features

- Remove FPX payment rail entirely (Malaysian, not UK)
- Add volunteer portal (/v/[code]) with live pledge tracking
- Add public event page (/e/[slug]) with progress bar + social proof
- Add fundraiser leaderboard (/dashboard/events/[id]/leaderboard)
- Add WhatsApp share buttons on confirmation, bank instructions, volunteer view
- Enhanced Gift Aid UX with +25% bonus display and HMRC declaration text
- Gift Aid report export (HMRC-ready CSV filter)
- Volunteer view link + WhatsApp share on QR code cards
- Updated home page: 4 personas, 3 UK payment rails, 8 features
- Public event API endpoint with privacy-safe donor name truncation
- Volunteer API with stats, conversion rate, auto-refresh

calvana-build/nginx.conf

@@ -0,0 +1,28 @@
+server {
+    listen 80;
+    server_name calvana.quikcue.com;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Fix: behind reverse proxy, use relative redirects
+    absolute_redirect off;
+
+    location / {
+        try_files $uri $uri/ =404;
+    }
+
+    location /css/ {
+        expires 1h;
+        add_header Cache-Control "public, immutable";
+    }
+
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+
+    gzip on;
+    gzip_types text/html text/css application/javascript text/plain;
+    gzip_min_length 256;
+
+    error_page 404 /404.html;
+}