fix(gateway): align session mocks and persist normalized push provider

src/gateway/server.ts

@@ -430,9 +430,17 @@ export class GatewayServer {
         if (!existing) {
           return;
         }
+        const provider = pushToken.provider === 'fcm' ? 'fcm' : 'apns';
+        const normalizedPushToken = {
+          provider,
+          token: pushToken.token,
+          topic: pushToken.topic,
+          environment: provider === 'apns' ? pushToken.environment : undefined,
+          registeredAt: pushToken.registeredAt,
+        };
         this.connectionStateMap.set(connectionId, {
           ...existing,
-          pushToken,
+          pushToken: normalizedPushToken,
         });
       },
     });