Fix clipboard copy on HTTP — use execCommand fallback

navigator.clipboard requires HTTPS (secure context). Fall back to
textarea + execCommand('copy') for the View in CARD button.

frontend/src/components/CardActionModal.js

@@ -155,7 +155,16 @@ export default function CardActionModal({ isOpen, onClose, item, initialAction,
                 {item?.host_id && (
                   <button
                     onClick={() => {
-                      navigator.clipboard.writeText(String(item.host_id));
+                      try {
+                        const ta = document.createElement('textarea');
+                        ta.value = String(item.host_id);
+                        ta.style.position = 'fixed';
+                        ta.style.opacity = '0';
+                        document.body.appendChild(ta);
+                        ta.select();
+                        document.execCommand('copy');
+                        document.body.removeChild(ta);
+                      } catch (_) { /* best effort */ }
                       window.open('https://card.charter.com/ipn-search', '_blank');
                     }}
                     title={`Copy Host ID ${item.host_id} and open CARD`}