refactor(frontend): lint, one session guard, one request helper, one user context

src/components/DeleteAccountCard.test.jsx

@@ -2,6 +2,7 @@
 import {afterEach, beforeEach, describe, expect, it, vi} from 'vitest';
 import {cleanup, fireEvent, render, screen, waitFor} from '@testing-library/react';
 import {MemoryRouter, Route, Routes} from 'react-router-dom';
+import RequireSession from './RequireSession.jsx';
 import {toast} from 'sonner';
 import DeleteAccountCard from './DeleteAccountCard.jsx';
 
@@ -15,7 +16,7 @@ const answer = (status, headers = {}) => ({ok: status < 300, status, headers: ne
 const renderCard = () => render(
     <MemoryRouter initialEntries={['/settings']}>
         <Routes>
-            <Route path="/settings" element={<DeleteAccountCard email={EMAIL}/>}/>
+            <Route element={<RequireSession/>}><Route path="/settings" element={<DeleteAccountCard email={EMAIL}/>}/></Route>
             <Route path="/" element={<p>landing</p>}/>
             <Route path="/login" element={<p>login</p>}/>
         </Routes>