fix(ui): keep dashboard configuration exit available and align heading help

Verified with the coordinated workspace changes by devkit full run
2026-09-08T225814-186389-0000-3e3ed7cd (all seven phases passed).
This shared UI pass does not mark the individual module reviews complete.

webui/src/features/dashboard/DashboardGrid.tsx

@@ -15,6 +15,7 @@ import {
 } from "lucide-react";
 import {
   Card,
+  DocumentationHelpLink,
   IconButton,
   type ApiSettings,
   type AuthInfo,
@@ -154,7 +155,7 @@ export default function DashboardGrid({
               onDragOver={(event) => event.preventDefault()}
               onDrop={onDropPreview}
             >
-              <Card title={widget.title}>
+              <Card title={widget.title} titleHelp={widget.documentation && <DocumentationHelpLink reference={widget.documentation} />}>
                 <DashboardWidgetContent
                   widget={widget}
                   placement={placement}
@@ -186,6 +187,7 @@ export default function DashboardGrid({
           >
             <Card
               title={widget.title}
+              titleHelp={widget.documentation && <DocumentationHelpLink reference={widget.documentation} />}
               collapsible={!configuring}
               collapseKey={`dashboard-widget:${placement.instanceId}`}
               actions={