MM-53467 Unrevert changes that update current user object (#23928)

* Revert "Revert "[MM-52547] Include current user profile in every redux action (#23219)""

This reverts commit 8f96888b1a06716d41e27e7f5e76fa193b0ac86d.

* Revert "Revert "[MM-52546] webapp/channels : Update current user and status on WebSocket reconnect (#23071)""

This reverts commit 69ee162a6e3d08f23f14628785b1e4f554259ea4.

* MM-53647 Fix overwriting the current user with sanitized data

e2e-tests/cypress/tests/integration/channels/account_settings/profile/mm_53377_regression_test_spec.js

@@ -0,0 +1,94 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+// ***************************************************************
+// - [#] indicates a test step (e.g. #. Go to a page)
+// - [*] indicates an assertion (e.g. * Check the title)
+// - Use element ID when selecting an element. Create one if none.
+// ***************************************************************
+
+// Group: @channels
+
+describe('MM-53377 Regression tests', () => {
+    let testTeam;
+    let testUser;
+    let testUser2;
+
+    before(() => {
+        cy.apiUpdateConfig({
+            PrivacySettings: {
+                ShowEmailAddress: false,
+                ShowFullName: false,
+            },
+        });
+
+        cy.apiInitSetup().then(({team, user, offTopicUrl}) => {
+            testTeam = team;
+            testUser = user;
+
+            cy.apiCreateUser().then((payload) => {
+                testUser2 = payload.user;
+                cy.apiAddUserToTeam(testTeam.id, payload.user.id);
+            });
+
+            cy.visit(offTopicUrl);
+        });
+    });
+
+    beforeEach(() => {
+        // # Login as testUser
+        cy.apiLogin(testUser);
+    });
+
+    it('should still have your email loaded after using the at-mention autocomplete', () => {
+        // * Ensure that this user is not an admin
+        cy.wrap(testUser).its('roles').should('equal', 'system_user');
+
+        // # Send a couple at mentions, quickly enough that the at mention autocomplete won't appear
+        cy.uiPostMessageQuickly(`@${testUser.username} @${testUser2.username}`);
+
+        // # Open the profile popover for the current user
+        cy.contains('.mention-link', `@${testUser.username}`).click();
+
+        // * Ensure that all fields are visible for the current user
+        cy.get('#user-profile-popover').within(() => {
+            cy.findByText(`@${testUser.username}`).should('exist');
+            cy.findByText(`${testUser.first_name} ${testUser.last_name}`).should('exist');
+            cy.findByText(testUser.email).should('exist');
+        });
+
+        // # Click anywhere to close profile popover
+        cy.get('#channelHeaderInfo').click();
+
+        // # Open the profile popover for another user
+        cy.contains('.mention-link', `@${testUser2.username}`).click();
+
+        // * Ensure that only the username is visible for another user
+        cy.get('#user-profile-popover').within(() => {
+            cy.findByText(`@${testUser2.username}`).should('exist');
+            cy.findByText(`${testUser2.first_name} ${testUser2.last_name}`).should('not.exist');
+            cy.findByText(testUser2.email).should('not.exist');
+        });
+
+        // # Start to type another at mention so that the autocomplete loads
+        cy.get('#post_textbox').type(`@${testUser.username}`);
+
+        // # Wait for the autocomplete to appear with the current user in it
+        cy.get('.suggestion-list').within(() => {
+            cy.findByText(`@${testUser.username}`);
+        });
+
+        // # Clear the post textbox to hide the autocomplete
+        cy.get('#post_textbox').clear();
+
+        // # Open the profile popover for the current user again
+        cy.contains('.mention-link', `@${testUser.username}`).click();
+
+        // * Ensure that all fields are still visible for the current user
+        cy.get('#user-profile-popover').within(() => {
+            cy.findByText(`@${testUser.username}`).should('exist');
+            cy.findByText(`${testUser.first_name} ${testUser.last_name}`).should('exist');
+            cy.findByText(testUser.email).should('exist');
+        });
+    });
+});