Add tests and raise coverage on pages (#2180)

* Add tests and raise coverage on pages

* Fix lint

front/src/pages/impersonate/__stories__/ImpersonateEffect.stories.tsx

@@ -0,0 +1,34 @@
+import { Meta, StoryObj } from '@storybook/react';
+
+import { AppPath } from '@/types/AppPath';
+import {
+  PageDecorator,
+  PageDecoratorArgs,
+} from '~/testing/decorators/PageDecorator';
+import { graphqlMocks } from '~/testing/graphqlMocks';
+import { sleep } from '~/testing/sleep';
+
+import { ImpersonateEffect } from '../ImpersonateEffect';
+
+const meta: Meta<PageDecoratorArgs> = {
+  title: 'Pages/Impersonate/Impersonate',
+  component: ImpersonateEffect,
+  decorators: [PageDecorator],
+  args: {
+    routePath: AppPath.Impersonate,
+    routeParams: { ':userId': '1' },
+  },
+  parameters: {
+    msw: graphqlMocks,
+  },
+};
+
+export default meta;
+
+export type Story = StoryObj<typeof ImpersonateEffect>;
+
+export const Default: Story = {
+  play: async ({}) => {
+    await sleep(100);
+  },
+};