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/page-layout/entities/page-layout.entity.ts

@@ -59,6 +59,16 @@ export class PageLayoutEntity
   })
   tabs: Relation<PageLayoutTabEntity[]>;
 
+  @Column({ nullable: true, type: 'uuid' })
+  defaultTabToFocusOnMobileAndSidePanelId: string | null;
+
+  @ManyToOne(() => PageLayoutTabEntity, {
+    onDelete: 'SET NULL',
+    nullable: true,
+  })
+  @JoinColumn({ name: 'defaultTabToFocusOnMobileAndSidePanelId' })
+  defaultTabToFocusOnMobileAndSidePanel: Relation<PageLayoutTabEntity> | null;
+
   @CreateDateColumn({ type: 'timestamptz' })
   createdAt: Date;