Fix value, value highlighting in editor

src/app/editor/editor.component.html

@@ -1,12 +1,13 @@
 <h2>{{ selectedMessage().name }}</h2>
 <div>
-  @for (item of selectedMessage().values; track $index) {
+  @if(values()) { @for (item of selectedMessage().values; track $index) {
   <app-proto-field
     [label]="item.name"
     [configuration]="item.configuration"
-    [(value)]="values()[$index]"
+    [value]="values()[item.name]"
+    (valueChange)="updateValue(item.name, $event)"
   ></app-proto-field>
-  }
+  } }
 </div>
 
-<pre><code class="language-json" #code>{{fileContents()}}</code></pre>
+<pre><code #code></code></pre>