refactor(swarm-mgmt): backfill host address from agent's .tgz source IP

decnet_web/src/components/AgentEnrollment.tsx

@@ -14,7 +14,6 @@ interface BundleResult {
 const AgentEnrollment: React.FC = () => {
   const [masterHost, setMasterHost] = useState(window.location.hostname);
   const [agentName, setAgentName] = useState('');
-  const [agentHost, setAgentHost] = useState('');
   const [withUpdater, setWithUpdater] = useState(true);
   const [servicesIni, setServicesIni] = useState<string | null>(null);
   const [servicesIniName, setServicesIniName] = useState<string | null>(null);
@@ -49,7 +48,6 @@ const AgentEnrollment: React.FC = () => {
     setResult(null);
     setError(null);
     setAgentName('');
-    setAgentHost('');
     setWithUpdater(true);
     setServicesIni(null);
     setServicesIniName(null);
@@ -65,7 +63,6 @@ const AgentEnrollment: React.FC = () => {
       const res = await api.post('/swarm/enroll-bundle', {
         master_host: masterHost,
         agent_name: agentName,
-        agent_host: agentHost,
         with_updater: withUpdater,
         services_ini: servicesIni,
       });
@@ -112,16 +109,6 @@ const AgentEnrollment: React.FC = () => {
                 required
               />
             </label>
-            <label>
-              Agent host (IP or DNS of the new worker VM)
-              <input
-                type="text"
-                value={agentHost}
-                onChange={(e) => setAgentHost(e.target.value)}
-                placeholder="e.g. 192.168.1.23"
-                required
-              />
-            </label>
             <label>
               Agent name (lowercase, digits, dashes)
               <input
@@ -152,7 +139,7 @@ const AgentEnrollment: React.FC = () => {
             <button
               type="submit"
               className="control-btn primary"
-              disabled={submitting || !nameOk || !masterHost || !agentHost}
+              disabled={submitting || !nameOk || !masterHost}
             >
               {submitting ? 'Generating…' : 'Generate enrollment bundle'}
             </button>

decnet_web/src/components/SwarmHosts.tsx

@@ -92,7 +92,7 @@ const SwarmHosts: React.FC = () => {
                     {h.status === 'active' ? <Wifi size={16} /> : <WifiOff size={16} />} {h.status}
                   </td>
                   <td>{h.name}</td>
-                  <td>{h.address}:{h.agent_port}</td>
+                  <td>{h.address ? `${h.address}:${h.agent_port}` : <em>pending first connect</em>}</td>
                   <td>{h.last_heartbeat ? new Date(h.last_heartbeat).toLocaleString() : '—'}</td>
                   <td title={h.client_cert_fingerprint}><code>{shortFp(h.client_cert_fingerprint)}</code></td>
                   <td>{new Date(h.enrolled_at).toLocaleString()}</td>