add a simple log viewer to the front end

src-ui/src/app/components/manage/logs/logs.component.html

@@ -1,2 +1,14 @@
 <app-page-header title="Logs">
-</app-page-header>
+</app-page-header>
+
+<div class="bg-dark p-3 mb-3" infiniteScroll (scrolled)="onScroll()">
+  <p
+    class="text-light text-monospace m-0 p-0 log-entry-{{log.level}}"
+    *ngFor="let log of logs">
+    {{log.group}}
+    {{log.created | date:'short'}}
+    {{getLevelText(log.level)}}
+    {{log.message}}
+    <a *ngIf="log.group" [routerLink]="" (click)="applyGroup(log.group)">(similar items)</a>
+  </p>
+</div>