fix: Enable code tab by default (#16018) (CP: 24.0) (#16021)

Author: Artur-

vaadin-dev-server/src/main/java/com/vaadin/base/devserver/DebugWindowConnection.java

@@ -40,7 +40,6 @@
 import com.vaadin.flow.server.startup.ApplicationConfiguration;
 import com.vaadin.pro.licensechecker.BuildType;
 import com.vaadin.pro.licensechecker.LicenseChecker;
-import com.vaadin.pro.licensechecker.LocalProKey;
 import com.vaadin.pro.licensechecker.Product;
 
 import elemental.json.Json;
@@ -136,10 +135,6 @@ public void onConnect(AtmosphereResource resource) {
                 .get(context).getFeatures().stream()
                 .filter(feature -> !feature.equals(FeatureFlags.EXAMPLE))
                 .collect(Collectors.toList())));
-
-        if (LocalProKey.get() != null) {
-            send(resource, "vaadin-dev-tools-code-ok", null);
-        }
     }
 
     private void send(AtmosphereResource resource, String command,

vaadin-dev-server/src/main/resources/META-INF/frontend/vaadin-dev-tools/vaadin-dev-tools.ts

@@ -965,7 +965,8 @@ export class VaadinDevTools extends LitElement {
   private tabs: Tab[] = [
     { id: 'log', title: 'Log', render: this.renderLog, activate: this.activateLog },
     { id: 'info', title: 'Info', render: this.renderInfo },
-    { id: 'features', title: 'Feature Flags', render: this.renderFeatures }
+    { id: 'features', title: 'Feature Flags', render: this.renderFeatures },
+    { id: 'code', title: 'Code', render: this.renderCode }
   ];
 
   @state()
@@ -1056,10 +1057,6 @@ export class VaadinDevTools extends LitElement {
         this.serverInfo = message.data as ServerInfo;
       } else if (message?.command === 'featureFlags') {
         this.features = message.data.features as Feature[];
-      } else if (message?.command === 'vaadin-dev-tools-code-ok') {
-        if ((window as any).Vaadin.Flow) {
-          this.tabs.push({ id: 'code', title: 'Code', render: this.renderCode });
-        }
       } else {
         // eslint-disable-next-line no-console
         console.error('Unknown message from front-end connection:', JSON.stringify(message));