show loading indicators when actions are pending

includes/admin/admin-backend/routes/domains.js

@@ -56,8 +56,11 @@ async function handleDomainsRoutes(req, res) {
       } catch (err) {
         // Fallback if plugin system not available
       }
+      // Only add internal domains that aren't already in the resolved list
       for (const d of internalDomains) {
-        resolved.push({ domain: d, hash: 'internal', isLocal: true, isOwner: true });
+        if (!resolved.some(r => r.domain === d)) {
+          resolved.push({ domain: d, hash: 'internal', isLocal: true, isOwner: true });
+        }
       }
       res.writeHead(200, { 'Content-Type': 'application/json' });
       res.end(JSON.stringify(resolved.sort((a, b) => a.domain.localeCompare(b.domain))));