Disable reset to default when custom tab or widget (#19814)

## Context
"Reset to default" action is rejected by the backend for custom entities
because there is no "default" concept for them

## Implementation
Grey out the Reset to default action on record page-layout tabs and
widgets when the entity either has no applicationId yet (unsaved draft —
previously slipped through the existing check), or belongs to the
workspace custom application.

<img width="926" height="370" alt="Screenshot 2026-04-17 at 18 50 31"
src="https://github.com/user-attachments/assets/c7c163f4-17a6-4b69-a66d-90f9085d27a2"
/>

packages/twenty-front/src/modules/page-layout/utils/__tests__/addWidgetToTab.test.ts

@@ -11,6 +11,7 @@ describe('addWidgetToTab', () => {
   const mockWidget: PageLayoutWidget = {
     __typename: 'PageLayoutWidget',
     id: 'widget-1',
+    applicationId: '',
     isActive: true,
     pageLayoutTabId: 'tab-1',
     title: 'Test Widget',

packages/twenty-front/src/modules/page-layout/utils/__tests__/convertLayoutsToWidgets.test.ts

@@ -12,6 +12,7 @@ describe('convertLayoutsToWidgets', () => {
   const mockWidgets: PageLayoutWidget[] = [
     {
       id: 'widget-1',
+      applicationId: '',
       isActive: true,
       pageLayoutTabId: 'tab-1',
       title: 'Widget 1',
@@ -35,6 +36,7 @@ describe('convertLayoutsToWidgets', () => {
     },
     {
       id: 'widget-2',
+      applicationId: '',
       isActive: true,
       pageLayoutTabId: 'tab-1',
       title: 'Widget 2',

packages/twenty-front/src/modules/page-layout/utils/__tests__/convertPageLayoutToTabLayouts.test.ts

@@ -28,6 +28,7 @@ describe('convertPageLayoutToTabLayouts', () => {
             {
               __typename: 'PageLayoutWidget',
               id: 'widget-1',
+              applicationId: '',
               isActive: true,
               pageLayoutTabId: 'tab-1',
               title: 'Widget 1',
@@ -47,6 +48,7 @@ describe('convertPageLayoutToTabLayouts', () => {
             {
               __typename: 'PageLayoutWidget',
               id: 'widget-2',
+              applicationId: '',
               isActive: true,
               pageLayoutTabId: 'tab-1',
               title: 'Widget 2',
@@ -110,6 +112,7 @@ describe('convertPageLayoutToTabLayouts', () => {
             {
               __typename: 'PageLayoutWidget',
               id: 'rich-text-widget',
+              applicationId: '',
               isActive: true,
               pageLayoutTabId: 'tab-1',
               title: 'Rich Text',

packages/twenty-front/src/modules/page-layout/utils/__tests__/extractFieldMetadataIdsFromWidget.test.ts

@@ -23,6 +23,7 @@ const createMockWidget = (
   },
 ): PageLayoutWidget => ({
   id: 'widget-1',
+  applicationId: '',
   isActive: true,
   type: WidgetType.GRAPH,
   title: 'Test',

packages/twenty-front/src/modules/page-layout/utils/__tests__/filterVisibleWidgets.test.ts

@@ -12,6 +12,7 @@ describe('filterVisibleWidgets', () => {
   ): PageLayoutTab['widgets'][0] => ({
     __typename: 'PageLayoutWidget',
     id,
+    applicationId: '',
     isActive: true,
     pageLayoutTabId: 'tab-1',
     title: `Widget ${id}`,

packages/twenty-front/src/modules/page-layout/utils/__tests__/getTabsWithVisibleWidgets.test.ts

@@ -12,6 +12,7 @@ describe('getTabsWithVisibleWidgets', () => {
   ): PageLayoutTab['widgets'][0] => ({
     __typename: 'PageLayoutWidget',
     id,
+    applicationId: '',
     isActive: true,
     pageLayoutTabId: 'tab-1',
     title: `Widget ${id}`,

packages/twenty-front/src/modules/page-layout/utils/__tests__/prepareGridLayoutItemsWithPlaceholders.test.ts

@@ -10,6 +10,7 @@ import {
 describe('prepareGridLayoutItemsWithPlaceholders', () => {
   const createMockWidget = (id: string): PageLayoutWidget => ({
     id,
+    applicationId: '',
     isActive: true,
     pageLayoutTabId: 'tab-1',
     title: `Test Widget ${id}`,

packages/twenty-front/src/modules/page-layout/utils/__tests__/removeWidgetFromTab.test.ts

@@ -20,6 +20,7 @@ describe('removeWidgetFromTab', () => {
         {
           __typename: 'PageLayoutWidget' as const,
           id: 'widget-1',
+          applicationId: '',
           isActive: true,
           pageLayoutTabId: 'tab-1',
           title: 'Widget 1',
@@ -39,6 +40,7 @@ describe('removeWidgetFromTab', () => {
         {
           __typename: 'PageLayoutWidget' as const,
           id: 'widget-2',
+          applicationId: '',
           isActive: true,
           pageLayoutTabId: 'tab-1',
           title: 'Widget 2',
@@ -73,6 +75,7 @@ describe('removeWidgetFromTab', () => {
         {
           __typename: 'PageLayoutWidget' as const,
           id: 'widget-3',
+          applicationId: '',
           isActive: true,
           pageLayoutTabId: 'tab-2',
           title: 'Widget 3',

packages/twenty-front/src/modules/page-layout/utils/createDefaultFieldWidget.ts

@@ -26,6 +26,7 @@ export const createDefaultFieldWidget = ({
   return {
     __typename: 'PageLayoutWidget',
     id,
+    applicationId: '',
     pageLayoutTabId,
     title,
     isActive: true,

packages/twenty-front/src/modules/page-layout/utils/createDefaultFieldsWidget.ts

@@ -21,6 +21,7 @@ export const createDefaultFieldsWidget = ({
   return {
     __typename: 'PageLayoutWidget',
     id,
+    applicationId: '',
     pageLayoutTabId,
     title: 'Fields',
     isActive: true,

packages/twenty-front/src/modules/page-layout/utils/createDefaultFrontComponentWidget.ts

@@ -16,6 +16,7 @@ export const createDefaultFrontComponentWidget = (
   return {
     __typename: 'PageLayoutWidget',
     id,
+    applicationId: '',
     pageLayoutTabId,
     title,
     isActive: true,

packages/twenty-front/src/modules/page-layout/utils/createDefaultGraphWidget.ts

@@ -70,6 +70,7 @@ export const createDefaultGraphWidget = ({
   return {
     __typename: 'PageLayoutWidget',
     id,
+    applicationId: '',
     pageLayoutTabId,
     title,
     isActive: true,

packages/twenty-front/src/modules/page-layout/utils/createDefaultIframeWidget.ts

@@ -17,6 +17,7 @@ export const createDefaultIframeWidget = (
   return {
     __typename: 'PageLayoutWidget',
     id,
+    applicationId: '',
     pageLayoutTabId,
     title,
     isActive: true,

packages/twenty-front/src/modules/page-layout/utils/createDefaultRecordTableWidget.ts

@@ -22,6 +22,7 @@ export const createDefaultRecordTableWidget = ({
   return {
     __typename: 'PageLayoutWidget',
     id,
+    applicationId: '',
     pageLayoutTabId,
     title,
     isActive: true,

packages/twenty-front/src/modules/page-layout/utils/createDefaultStandaloneRichTextWidget.ts

@@ -17,6 +17,7 @@ export const createDefaultStandaloneRichTextWidget = (
   return {
     __typename: 'PageLayoutWidget',
     id,
+    applicationId: '',
     pageLayoutTabId,
     title: 'Untitled Rich Text',
     isActive: true,

packages/twenty-front/src/modules/page-layout/utils/injectRelationWidgetsIntoLayout.ts

@@ -16,6 +16,7 @@ const getRelationFieldWidgetToInsert = (
 ): PageLayoutWidget => ({
   __typename: 'PageLayoutWidget' as const,
   id: `${DYNAMIC_RELATION_WIDGET_ID_PREFIX}${field.id}-${field.label}`,
+  applicationId: '',
   pageLayoutTabId: tabId,
   title: field.label,
   isActive: true,