Update pageLayout* data models for backend recordPageLayout refactor (#17446)

<img width="814" height="356" alt="Screenshot 2026-01-26 at 16 09 27"
src="https://github.com/user-attachments/assets/91d95a1d-cc33-4bf0-a63e-4d1815030983"
/>

packages/twenty-server/src/engine/metadata-modules/flat-page-layout-tab/utils/from-create-page-layout-tab-input-to-flat-page-layout-tab-to-create.util.ts

@@ -1,3 +1,4 @@
+import { PageLayoutTabLayoutMode } from 'twenty-shared/types';
 import { trimAndRemoveDuplicatedWhitespacesFromObjectStringProperties } from 'twenty-shared/utils';
 import { v4 } from 'uuid';
 
@@ -36,5 +37,7 @@ export const fromCreatePageLayoutTabInputToFlatPageLayoutTabToCreate = ({
     universalIdentifier: pageLayoutTabId,
     applicationId: workspaceCustomApplicationId,
     widgetIds: [],
+    icon: null,
+    layoutMode: PageLayoutTabLayoutMode.GRID,
   };
 };

packages/twenty-server/src/engine/metadata-modules/flat-page-layout-tab/utils/transform-page-layout-tab-entity-to-flat-page-layout-tab.util.ts

@@ -46,6 +46,8 @@ export const transformPageLayoutTabEntityToFlatPageLayoutTab = ({
     universalIdentifier: pageLayoutTabEntity.universalIdentifier,
     applicationId: pageLayoutTabEntity.applicationId,
     widgetIds: pageLayoutTabEntity.widgets.map((widget) => widget.id),
+    icon: pageLayoutTabEntity.icon,
+    layoutMode: pageLayoutTabEntity.layoutMode,
     __universal: {
       universalIdentifier: pageLayoutTabEntity.universalIdentifier,
       applicationUniversalIdentifier,