ui: Auto display grades to admin when work is over

ui/src/routes/works/[wid]/+page.svelte

@@ -52,8 +52,10 @@
     <SurveyBadge class="ms-2" survey={w} />
 </div>
 
-{#if $user && $user.is_admin && edit}
-    <WorkAdmin work={w} on:saved={() => edit = false} />
+{#if $user && $user.is_admin && (edit || w.endAvailability() < Date.now())}
+    {#if edit}
+        <WorkAdmin work={w} on:saved={() => edit = false} />
+    {/if}
 
     {#if w.description}
         <hr>