Adopt shared WebUI layout primitives

webui/src/features/workflow/WorkflowRunsDialog.tsx

@@ -15,7 +15,7 @@ import {
   RotateCcw,
   XCircle
 } from "lucide-react";
-import {
+import { ActionToolbar,
   Button,
   ConfirmDialog,
   Dialog,
@@ -299,7 +299,7 @@ export default function WorkflowRunsDialog({
         onClose={close}
         footer={<Button onClick={close}>Close</Button>}
       >
-        <div className="workflow-runs-toolbar">
+        <ActionToolbar className="workflow-runs-toolbar">
           <span>
             <strong>Workflow instances</strong>
             <small>Revision-pinned runs and human handoffs</small>
@@ -325,7 +325,7 @@ export default function WorkflowRunsDialog({
               <Play size={16} /> Start
             </Button>
           </span>
-        </div>
+        </ActionToolbar>
         {error ? (
           <DismissibleAlert tone="danger" resetKey={error}>
             {error}