fix(ssid): update portal serverUrl to our server on every SSID set

When reusing an existing portal (or re-linking an SSID), the portal's
externalPortal.serverUrl was left pointing to whatever was set before.
Now patches the URL to mbonea-wifibiz.hf.space/portal/{siteId} every
time an SSID is created or updated.

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

src/routes/devices.routes.js

@@ -631,15 +631,19 @@ router.patch("/:id/ssid", async (req, res) => {
             await omada.updatePortalSSID(siteId, portalId, [ssidId]).catch(err =>
               console.warn(`[devices/ssid] portal link failed:`, err.message)
             );
-            console.log(`[devices/ssid] device=${device.id} portal linked ssid=${ssidId}`);
+            await omada.updatePortalUrl(siteId, portalId).catch(err =>
+              console.warn(`[devices/ssid] portal URL update failed:`, err.message)
+            );
+            console.log(`[devices/ssid] device=${device.id} portal linked+url updated ssid=${ssidId}`);
           } else {
             // Portal was never saved — check if Omada already has one, otherwise create
             try {
               const existingPortals = await omada.getPortals(siteId);
               if (existingPortals.length > 0) {
-                // Reuse the first existing portal and link the SSID to it
+                // Reuse the first existing portal — link the SSID and fix the server URL
                 portalId = existingPortals[0].id;
                 await omada.updatePortalSSID(siteId, portalId, [ssidId]);
+                await omada.updatePortalUrl(siteId, portalId);
                 console.log(`[devices/ssid] device=${device.id} reusing portal=${portalId}`);
               } else {
                 const deviceName = await db.queryOne(`SELECT name FROM devices WHERE id = ?`, [device.id]).then(r => r?.name || `Device ${device.id}`);

src/services/omada.js

@@ -289,6 +289,20 @@ async function updatePortalSSID(siteId, portalId, ssidList) {
   return omadaRequest('PATCH', `/sites/${siteId}/setting/portals/${portalId}`, { ssidList });
 }
 
+async function updatePortalUrl(siteId, portalId) {
+  const scheme    = process.env.PORTAL_SCHEME || 'https';
+  const serverUrl = `${process.env.PORTAL_HOST}/portal/${siteId}`;
+  return omadaRequest('PATCH', `/sites/${siteId}/setting/portals/${portalId}`, {
+    authType: 4,
+    externalPortal: {
+      hostType:        2,
+      serverUrlScheme: scheme,
+      serverUrl,
+      logout:          false,
+    },
+  });
+}
+
 // ── Devices ───────────────────────────────────────────────────────────────────
 
 async function getSiteDevices(siteId) {
@@ -400,6 +414,7 @@ module.exports = {
   getSiteById,
   createPortal,
   getPortals,
+  updatePortalUrl,
   getWlans,
   getOrCreateWlan,
   getSSIDs,