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/services/workspace-flat-page-layout-map-cache.service.ts

@@ -70,6 +70,8 @@ export class WorkspaceFlatPageLayoutMapCacheService extends WorkspaceCacheProvid
       createIdToUniversalIdentifierMap(applications);
     const objectMetadataIdToUniversalIdentifierMap =
       createIdToUniversalIdentifierMap(objectMetadatas);
+    const pageLayoutTabIdToUniversalIdentifierMap =
+      createIdToUniversalIdentifierMap(pageLayoutTabs);
 
     const flatPageLayoutMaps = createEmptyFlatEntityMaps();
 
@@ -81,6 +83,7 @@ export class WorkspaceFlatPageLayoutMapCacheService extends WorkspaceCacheProvid
         },
         applicationIdToUniversalIdentifierMap,
         objectMetadataIdToUniversalIdentifierMap,
+        pageLayoutTabIdToUniversalIdentifierMap,
       });
 
       addFlatEntityToFlatEntityMapsThroughMutationOrThrow({

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

@@ -37,5 +37,6 @@ export const fromCreatePageLayoutInputToFlatPageLayoutToCreate = ({
     universalIdentifier: pageLayoutId,
     applicationId: workspaceCustomApplicationId,
     tabIds: [],
+    defaultTabToFocusOnMobileAndSidePanelId: null,
   };
 };

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

@@ -11,6 +11,7 @@ export const transformPageLayoutEntityToFlatPageLayout = ({
   entity: pageLayoutEntity,
   applicationIdToUniversalIdentifierMap,
   objectMetadataIdToUniversalIdentifierMap,
+  pageLayoutTabIdToUniversalIdentifierMap,
 }: FromEntityToFlatEntityArgs<'pageLayout'>): FlatPageLayout => {
   const applicationUniversalIdentifier =
     applicationIdToUniversalIdentifierMap.get(pageLayoutEntity.applicationId);
@@ -38,6 +39,23 @@ export const transformPageLayoutEntityToFlatPageLayout = ({
     }
   }
 
+  let defaultTabToFocusOnMobileAndSidePanelUniversalIdentifier: string | null =
+    null;
+
+  if (isDefined(pageLayoutEntity.defaultTabToFocusOnMobileAndSidePanelId)) {
+    defaultTabToFocusOnMobileAndSidePanelUniversalIdentifier =
+      pageLayoutTabIdToUniversalIdentifierMap.get(
+        pageLayoutEntity.defaultTabToFocusOnMobileAndSidePanelId,
+      ) ?? null;
+
+    if (!isDefined(defaultTabToFocusOnMobileAndSidePanelUniversalIdentifier)) {
+      throw new FlatEntityMapsException(
+        `PageLayoutTab with id ${pageLayoutEntity.defaultTabToFocusOnMobileAndSidePanelId} not found for pageLayout ${pageLayoutEntity.id}`,
+        FlatEntityMapsExceptionCode.ENTITY_NOT_FOUND,
+      );
+    }
+  }
+
   return {
     createdAt: pageLayoutEntity.createdAt.toISOString(),
     deletedAt: pageLayoutEntity.deletedAt?.toISOString() ?? null,
@@ -50,6 +68,8 @@ export const transformPageLayoutEntityToFlatPageLayout = ({
     universalIdentifier: pageLayoutEntity.universalIdentifier,
     applicationId: pageLayoutEntity.applicationId,
     tabIds: pageLayoutEntity.tabs.map((tab) => tab.id),
+    defaultTabToFocusOnMobileAndSidePanelId:
+      pageLayoutEntity.defaultTabToFocusOnMobileAndSidePanelId,
     __universal: {
       universalIdentifier: pageLayoutEntity.universalIdentifier,
       applicationUniversalIdentifier,
@@ -57,6 +77,7 @@ export const transformPageLayoutEntityToFlatPageLayout = ({
       tabUniversalIdentifiers: pageLayoutEntity.tabs.map(
         (tab) => tab.universalIdentifier,
       ),
+      defaultTabToFocusOnMobileAndSidePanelUniversalIdentifier,
     },
   };
 };