add customUi props for History and Save to workspace editor bar buttons (#8336)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/lib/components/EditorBar.svelte

@@ -1096,7 +1096,7 @@ JsonNode ${windmillPathToCamelCaseName(path)} = JsonNode.Parse(await client.GetS
 
 	<div class="flex flex-row items-center gap-2 whitespace-nowrap">
 		{@render right?.()}
-		{#if scriptPath && !noHistory}
+		{#if scriptPath && !noHistory && customUi?.history != false}
 			<Button
 				unifiedSize="sm"
 				variant="subtle"
@@ -1120,7 +1120,7 @@ JsonNode ${windmillPathToCamelCaseName(path)} = JsonNode.Parse(await client.GetS
 				Library
 			</Button>
 		{/if}
-		{#if saveToWorkspace}
+		{#if saveToWorkspace && customUi?.saveToWorkspace != false}
 			<Button
 				unifiedSize="sm"
 				variant="subtle"

frontend/src/lib/components/custom_ui.ts

@@ -81,6 +81,8 @@ export type EditorBarUi = {
 	ducklake?: boolean
 	dataTable?: boolean
 	debug?: boolean
+	history?: boolean
+	saveToWorkspace?: boolean
 }
 
 export type EditableSchemaFormUi = {