append part attributes

Author: nielslyngsoe

src/packages/block/block-grid/components/block-grid-areas-container/block-grid-areas-container.element.ts

@@ -62,6 +62,7 @@ export class UmbBlockGridAreasContainerElement extends UmbLitElement {
 			? html` ${this._styleElement}
 					<div
 						class="umb-block-grid__area-container"
+						part="area-container"
 						style="--umb-block-grid--area-grid-columns: ${this._areaGridColumns}">
 						${repeat(
 							this._areas,

src/packages/block/block-grid/property-editors/block-grid-areas-config/property-editor-ui-block-grid-areas-config.element.ts

@@ -117,6 +117,7 @@ export class UmbPropertyEditorUIBlockGridAreasConfigElement
 			? html`${this._styleElement}
 					<div
 						class="umb-block-grid__area-container"
+						part="area-container"
 						style="--umb-block-grid--area-grid-columns: ${this._areaGridColumns}">
 						${repeat(
 							this.value,