17042 followups (#17122)

Followups after @Weiko review on
https://github.com/twentyhq/twenty/pull/17042

packages/twenty-server/src/engine/metadata-modules/page-layout/services/page-layout.service.ts

@@ -350,6 +350,57 @@ export class PageLayoutService {
     return true;
   }
 
+  async destroyMany({
+    ids,
+    workspaceId,
+  }: {
+    ids: string[];
+    workspaceId: string;
+  }): Promise<boolean> {
+    if (ids.length === 0) {
+      return true;
+    }
+
+    const { flatPageLayoutMaps: existingFlatPageLayoutMaps } =
+      await this.workspaceManyOrAllFlatEntityMapsCacheService.getOrRecomputeManyOrAllFlatEntityMaps(
+        {
+          workspaceId,
+          flatMapsKeys: ['flatPageLayoutMaps'],
+        },
+      );
+
+    const flatPageLayoutsToDestroy = ids.map((id) =>
+      fromDestroyPageLayoutInputToFlatPageLayoutOrThrow({
+        destroyPageLayoutInput: { id },
+        flatPageLayoutMaps: existingFlatPageLayoutMaps,
+      }),
+    );
+
+    const validateAndBuildResult =
+      await this.workspaceMigrationValidateBuildAndRunService.validateBuildAndRunWorkspaceMigration(
+        {
+          allFlatEntityOperationByMetadataName: {
+            pageLayout: {
+              flatEntityToCreate: [],
+              flatEntityToDelete: flatPageLayoutsToDestroy,
+              flatEntityToUpdate: [],
+            },
+          },
+          workspaceId,
+          isSystemBuild: false,
+        },
+      );
+
+    if (isDefined(validateAndBuildResult)) {
+      throw new WorkspaceMigrationBuilderException(
+        validateAndBuildResult,
+        'Multiple validation errors occurred while destroying page layouts',
+      );
+    }
+
+    return true;
+  }
+
   private async destroyAssociatedDashboards({
     pageLayoutId,
     workspaceId,