fix(ui): align contextual documentation with headings

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/datasources/DatasourcesPage.tsx

@@ -376,11 +376,12 @@ export default function DatasourcesPage({
   return (
     <WorkspaceFrame as="main" height="viewport" surface="plain" className="datasources-page" label="Datasource workspace">
       <WorkspaceActionBar
+        title="Data"
+        titleHelp={<DocumentationHelpLink reference={DATASOURCES_DOCUMENTATION} />}
         scope="workspace"
         variant="collection"
         refreshable
         reloadAction={{ onReload: () => void reload(selectedDatasourceRef), loading: loading || working }}
-        contextActions={<strong>Data</strong>}
         createAction={<IconButton
           label="Add datasource or stage"
           icon={<Plus size={17} />}
@@ -500,7 +501,6 @@ export default function DatasourcesPage({
                 </small>
               </span>
             </span>}
-            helpAction={<DocumentationHelpLink reference={DATASOURCES_DOCUMENTATION} />}
             primaryActions={<>
               {view === "catalogue" && selectedDatasource?.mode === "cached" ? (
                 <Button onClick={() => void refreshSelected()} disabled={!canManage || working} disabledReason={working ? DATASOURCES_I18N.working : !canManage ? DATASOURCES_I18N.manageReason : undefined}>