Add federated room detail page and improve address parsing in invites

server/routes/federation.js

@@ -77,7 +77,7 @@ router.post('/invite', authenticateToken, async (req, res) => {
         const inviteId = uuidv4();
         const payload = {
             invite_id: inviteId,
-            from_user: `${req.user.name}@${getFederationDomain()}`,
+            from_user: `@${req.user.name}@${getFederationDomain()}`,
             to_user: to,
             room_name: room.name,
             room_uid: room.uid,
@@ -195,7 +195,7 @@ router.post('/receive', async (req, res) => {
 
         // Send notification email (truly fire-and-forget – never blocks the response)
         if (targetUser.email) {
-          const appUrl = process.env.APP_URL || '';
+          const appUrl = process.env.APP_URL || `${req.protocol}://${req.get('host')}`;
           const inboxUrl = `${appUrl}/federation/inbox`;
           const appName = process.env.APP_NAME || 'Redlight';
           sendFederationInviteEmail(