fix: Remove user.permissions, resolve it from accounts (#9990)

Remove the `user.permissions` field and resolve the permissions directly
from the accounts array in the user. This change ensures that the cache
or previous values from the last active account don't affect the
permissions.

In this PR: 
- Remove user.permissions usage, replace it with getUserPermissions
method.
- Remove json.permissions from user.json.jbuilder

app/javascript/dashboard/helper/specs/permissionsHelper.spec.js

@@ -1,8 +1,31 @@
 import {
   buildPermissionsFromRouter,
+  getCurrentAccount,
+  getUserPermissions,
   hasPermissions,
 } from '../permissionsHelper';
 
+describe('#getCurrentAccount', () => {
+  it('should return the current account', () => {
+    expect(getCurrentAccount({ accounts: [{ id: 1 }] }, 1)).toEqual({ id: 1 });
+    expect(getCurrentAccount({ accounts: [] }, 1)).toEqual(undefined);
+  });
+});
+
+describe('#getUserPermissions', () => {
+  it('should return the correct permissions', () => {
+    const user = {
+      accounts: [
+        { id: 1, permissions: ['conversations_manage'] },
+        { id: 3, permissions: ['contacts_manage'] },
+      ],
+    };
+    expect(getUserPermissions(user, 1)).toEqual(['conversations_manage']);
+    expect(getUserPermissions(user, '3')).toEqual(['contacts_manage']);
+    expect(getUserPermissions(user, 2)).toEqual([]);
+  });
+});
+
 describe('hasPermissions', () => {
   it('returns true if permission is present', () => {
     expect(

app/javascript/dashboard/helper/specs/routeHelpers.spec.js

@@ -1,19 +1,11 @@
 import {
   getConversationDashboardRoute,
-  getCurrentAccount,
   isAConversationRoute,
   routeIsAccessibleFor,
   validateLoggedInRoutes,
   isAInboxViewRoute,
 } from '../routeHelpers';
 
-describe('#getCurrentAccount', () => {
-  it('should return the current account', () => {
-    expect(getCurrentAccount({ accounts: [{ id: 1 }] }, 1)).toEqual({ id: 1 });
-    expect(getCurrentAccount({ accounts: [] }, 1)).toEqual(undefined);
-  });
-});
-
 describe('#routeIsAccessibleFor', () => {
   it('should return the correct access', () => {
     let route = { meta: { permissions: ['administrator'] } };