Fix iSCSI portal create: remove port from listen entries

The TrueNAS API rejects port inside listen array items
(iscsi_portal_create.listen.0.port: Extra inputs are not permitted).
Port is a global iSCSI setting, not per-listen-IP.

- _iscsi_portal_payload(): strip port from each listen entry,
  keeping only {"ip": "..."}
- _prompt_iscsi_portals(): remove port prompt from wizard; show
  source IPs without port in the display

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

truenas_migrate/cli.py

@@ -197,8 +197,7 @@ def _prompt_iscsi_portals(iscsi: dict) -> None:
     for portal in portals:
         comment      = portal.get("comment", "")
         listen       = portal.get("listen", [])
-        src_ips      = "  ".join(f"{l['ip']}:{l['port']}" for l in listen)
-        default_port = listen[0]["port"] if listen else 3260
+        src_ips = "  ".join(f"{l['ip']}" for l in listen)
 
         label = f"Portal {portal['id']}" + (f" ({comment!r})" if comment else "")
         print(f"\n  {_bold(label)}")
@@ -209,11 +208,9 @@ def _prompt_iscsi_portals(iscsi: dict) -> None:
             print(f"  {_yellow('⚠')} No IPs entered — keeping source IPs.")
             continue
 
-        port_raw = _prompt("  Port", default=str(default_port))
-        port = int(port_raw) if port_raw.isdigit() else default_port
         dest_ips = raw.split()
-        portal["listen"] = [{"ip": ip, "port": port} for ip in dest_ips]
-        print(f"  {_green('✓')} Portal: {', '.join(f'{ip}:{port}' for ip in dest_ips)}")
+        portal["listen"] = [{"ip": ip} for ip in dest_ips]
+        print(f"  {_green('✓')} Portal: {', '.join(dest_ips)}")
     print()
 
 

truenas_migrate/migrate.py

@@ -179,7 +179,10 @@ def _iscsi_initiator_payload(initiator: dict) -> dict:
 
 
 def _iscsi_portal_payload(portal: dict) -> dict:
-    return {k: v for k, v in portal.items() if k not in _ISCSI_PORTAL_READONLY}
+    payload = {k: v for k, v in portal.items() if k not in _ISCSI_PORTAL_READONLY}
+    # The API only accepts {"ip": "..."} in listen entries — port is a global setting
+    payload["listen"] = [{"ip": l["ip"]} for l in payload.get("listen", [])]
+    return payload
 
 
 def _iscsi_target_payload(