Fix nothing logged in frontend when log_level warn is set. https://github.com/Koenkk/zigbee2mqtt/issues/5812

lib/extension/bridge.js

@@ -68,7 +68,7 @@ class Bridge extends Extension {
             }
         }
 
-        logger.add(new EventTransport({level: logger.getLevel()}));
+        logger.addTransport(new EventTransport());
     }
 
     permitJoinChanged(data) {

lib/util/logger.js

@@ -133,6 +133,10 @@ function logOutput() {
     }
 }
 
+logger.addTransport = (transport) => {
+    transport.level = transportsToUse[0].level;
+    logger.add(transport);
+};
 logger.cleanup = cleanup;
 logger.logOutput = logOutput;
 logger.getLevel = () => winstonToZ2mLevel(transportsToUse[0].level);