fix: Make agent codenames prettier

frontend/src/app/agent/agent-list.component.html

@@ -40,7 +40,11 @@
   <mat-action-list>
     <mat-list-item *ngFor="let agent of agents" [routerLink]="['/auth/agent/', agent.id]">
       <h2 mat-line> {{agent.name}} </h2>
-      <p mat-line>A.K.A. <span *ngFor="let codeName of agent.codeNames"> {{codeName.codeName}}, </span></p>
+      <p mat-line>
+        <span *ngFor="let codeName of agent.codeNames; let isLast = last" class="italic">
+          {{codeName.codeName}}{{isLast ? '' : ', '}}
+        </span>
+      </p>
       <mat-divider></mat-divider>
     </mat-list-item>
   </mat-action-list>