use one-line-summary version of TextSummary and adds an <hr>

Fixes #19157 where we notice that the description could be full width instead of truncated half way, as well as the need for a visual distinction between the run form and the header annotation.

client/src/components/Workflow/WorkflowAnnotation.vue

@@ -92,8 +92,9 @@ const workflowTags = computed(() => {
             </div>
         </div>
         <div v-if="props.showDetails">
-            <TextSummary v-if="description" class="my-1" :description="description" />
+            <TextSummary v-if="description" class="my-1" :description="description" one-line-summary component="span" />
             <StatelessTags v-if="workflowTags.length" :value="workflowTags" :disabled="true" />
+            <hr class="mb-0 mt-2" />
         </div>
     </div>
 </template>