[Dashboard] Remove modal for inter app from dashboard (elastic#198619)

## Summary

Closes elastic#184257
This PR removes the modal warning users that unsaved changes would be
lost when navigating away from dashboard to other apps within Kibana.
The modal is not necessary since unsaved changes are saved in session
storage. The benefit is that this removes the unnecessary click for
users.


This does not impact the modal for switching to view mode from edit mode
with unsaved changes as shown below.



https://github.com/user-attachments/assets/c5bdb0ec-b040-40b0-a511-fd16ad084b90


### Checklist

 - [x] Update tests

src/plugins/dashboard/public/dashboard_app/_dashboard_app_strings.ts

@@ -78,21 +78,6 @@ export const unsavedChangesBadgeStrings = {
     }),
 };
 
-export const leaveConfirmStrings = {
-  getLeaveTitle: () =>
-    i18n.translate('dashboard.appLeaveConfirmModal.unsavedChangesTitle', {
-      defaultMessage: 'Unsaved changes',
-    }),
-  getLeaveSubtitle: () =>
-    i18n.translate('dashboard.appLeaveConfirmModal.unsavedChangesSubtitle', {
-      defaultMessage: 'Leave Dashboard with unsaved work?',
-    }),
-  getLeaveCancelButtonText: () =>
-    i18n.translate('dashboard.appLeaveConfirmModal.cancelButtonLabel', {
-      defaultMessage: 'Cancel',
-    }),
-};
-
 export const getCreateVisualizationButtonTitle = () =>
   i18n.translate('dashboard.solutionToolbar.addPanelButtonLabel', {
     defaultMessage: 'Create visualization',

src/plugins/dashboard/public/dashboard_top_nav/internal_dashboard_top_nav.tsx

@@ -33,7 +33,6 @@ import {
   dashboardManagedBadge,
   getDashboardBreadcrumb,
   getDashboardTitle,
-  leaveConfirmStrings,
   unsavedChangesBadgeStrings,
 } from '../dashboard_app/_dashboard_app_strings';
 import { useDashboardMountContext } from '../dashboard_app/hooks/dashboard_mount_context';
@@ -48,7 +47,6 @@ import { getDashboardRecentlyAccessedService } from '../services/dashboard_recen
 import {
   coreServices,
   dataService,
-  embeddableService,
   navigationService,
   serverlessService,
 } from '../services/kibana_services';
@@ -195,16 +193,6 @@ export function InternalDashboardTopNav({
    */
   useEffect(() => {
     onAppLeave((actions) => {
-      if (
-        viewMode === 'edit' &&
-        hasUnsavedChanges &&
-        !embeddableService.getStateTransfer().isTransferInProgress
-      ) {
-        return actions.confirm(
-          leaveConfirmStrings.getLeaveSubtitle(),
-          leaveConfirmStrings.getLeaveTitle()
-        );
-      }
       return actions.default();
     });
     return () => {

test/functional/apps/dashboard/group1/edit_visualizations.js

@@ -10,7 +10,7 @@
 import expect from '@kbn/expect';
 
 export default function ({ getService, getPageObjects }) {
-  const { dashboard, header, visualize, common, visEditor } = getPageObjects([
+  const { dashboard, header, visualize, visEditor } = getPageObjects([
     'dashboard',
     'header',
     'visualize',
@@ -114,7 +114,6 @@ export default function ({ getService, getPageObjects }) {
 
       await header.waitUntilLoadingHasFinished();
       await appsMenu.clickLink('Visualize Library');
-      await common.clickConfirmOnModal();
       expect(await testSubjects.exists('visualizationLandingPage')).to.be(true);
     });
 
@@ -132,7 +131,6 @@ export default function ({ getService, getPageObjects }) {
 
       await header.waitUntilLoadingHasFinished();
       await appsMenu.clickLink('Visualize Library');
-      await common.clickConfirmOnModal();
       expect(await testSubjects.exists('visualizationLandingPage')).to.be(true);
     });
 

x-pack/plugins/translations/translations/fr-FR.json

@@ -1209,9 +1209,6 @@
     "dashboard.actions.toggleExpandPanelMenuItem.notExpandedDisplayName": "Maximiser",
     "dashboard.addPanel.newEmbeddableAddedSuccessMessageTitle": "{savedObjectName} a été ajouté.",
     "dashboard.addPanel.newEmbeddableWithNoTitleAddedSuccessMessageTitle": "Un panneau a été ajouté",
-    "dashboard.appLeaveConfirmModal.cancelButtonLabel": "Annuler",
-    "dashboard.appLeaveConfirmModal.unsavedChangesSubtitle": "Quitter Dashboard sans enregistrer ?",
-    "dashboard.appLeaveConfirmModal.unsavedChangesTitle": "Modifications non enregistrées",
     "dashboard.badge.readOnly.text": "Lecture seule",
     "dashboard.badge.readOnly.tooltip": "Impossible d'enregistrer les tableaux de bord",
     "dashboard.createConfirmModal.cancelButtonLabel": "Annuler",

x-pack/plugins/translations/translations/ja-JP.json

@@ -1209,9 +1209,6 @@
     "dashboard.actions.toggleExpandPanelMenuItem.notExpandedDisplayName": "最大化",
     "dashboard.addPanel.newEmbeddableAddedSuccessMessageTitle": "{savedObjectName} が追加されました",
     "dashboard.addPanel.newEmbeddableWithNoTitleAddedSuccessMessageTitle": "パネルが追加されました",
-    "dashboard.appLeaveConfirmModal.cancelButtonLabel": "キャンセル",
-    "dashboard.appLeaveConfirmModal.unsavedChangesSubtitle": "作業を保存せずにダッシュボードから移動しますか？",
-    "dashboard.appLeaveConfirmModal.unsavedChangesTitle": "保存されていない変更",
     "dashboard.badge.readOnly.text": "読み取り専用",
     "dashboard.badge.readOnly.tooltip": "ダッシュボードを保存できません",
     "dashboard.createConfirmModal.cancelButtonLabel": "キャンセル",

x-pack/plugins/translations/translations/zh-CN.json

@@ -1209,9 +1209,6 @@
     "dashboard.actions.toggleExpandPanelMenuItem.notExpandedDisplayName": "最大化",
     "dashboard.addPanel.newEmbeddableAddedSuccessMessageTitle": "{savedObjectName} 已添加",
     "dashboard.addPanel.newEmbeddableWithNoTitleAddedSuccessMessageTitle": "已添加一个面板",
-    "dashboard.appLeaveConfirmModal.cancelButtonLabel": "取消",
-    "dashboard.appLeaveConfirmModal.unsavedChangesSubtitle": "离开有未保存工作的仪表板？",
-    "dashboard.appLeaveConfirmModal.unsavedChangesTitle": "未保存的更改",
     "dashboard.badge.readOnly.text": "只读",
     "dashboard.badge.readOnly.tooltip": "无法保存仪表板",
     "dashboard.createConfirmModal.cancelButtonLabel": "取消",