feat: sprint 1 — auth + CRUD engagements

Ship the first feature end-to-end on the UI: users log in with JWT,
admins manage user accounts, and any authenticated user (per RBAC)
can create, list, view, edit, and delete engagements.

Backend (Flask + SQLAlchemy + SQLite, 63 pytest)
- User / Engagement models, Alembic 0001 initial schema
- argon2 password hashing, JWT bearer (60-min TTL), @login_required
  and @role_required decorators
- 13 API endpoints under /api/*, including last-admin protection on
  DELETE/PATCH user and JSON 404 on unknown /api/* paths
- `flask create-admin` CLI with duplicate / short-password handling

Frontend (React + Vite + Tailwind + TanStack Query, 20 vitest)
- Inter font bundled locally (no CDN), DESIGN.md tokens in Tailwind
- LoginPage / EngagementsList / EngagementForm / EngagementDetail /
  UsersAdmin pages with role-aware UI
- Layout, ProtectedRoute, StatusBadge, FormField, LoadingState,
  ErrorState, EmptyState, Toast + provider
- Axios client: Bearer interceptor, 401 → purge + /login + "Session
  expirée" toast, 403 → "Accès refusé" toast (declarative <Navigate>
  for already-authed users, Fragment-keyed admin user rows)

Deployment
- Single multistage Dockerfile (node:20-alpine → python:3.12-slim)
- docker/entrypoint.sh runs `flask db upgrade` before `flask run`
- Makefile: build/start/stop/restart/update/logs/create-admin/
  update-mitre/test-{backend,frontend,e2e}/clean
- .env.example documenting MIMIC_JWT_SECRET / MIMIC_DB_PATH / MIMIC_PORT
- SQLite at /data/mimic.sqlite on named volume mimic-data

Acceptance suite (Playwright, 36 tests, all 27 ACs)
- e2e/ scaffold with playwright.config + auth/api fixtures
- One spec per user story (us1-bootstrap through us6-deployment)
- Portable via MIMIC_CONTAINER_CMD / MIMIC_BASE_URL (docker or podman)

Docs
- README.md with quick-start and architecture overview
- CHANGELOG.md updated with Sprint 1 deliverables
- pyrightconfig.json so the Python LSP sees backend/.venv and
  resolves the `backend.app.*` absolute imports

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/tests/UsersAdminPage.test.tsx

@@ -0,0 +1,106 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { screen, waitFor, within } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import MockAdapter from 'axios-mock-adapter';
+import { apiClient } from '@/api/client';
+import { UsersAdminPage } from '@/pages/UsersAdminPage';
+import { renderWithProviders } from './utils';
+import type { User } from '@/api/types';
+
+// Mock useAuth so the page sees a logged-in admin without hydrating from network.
+vi.mock('@/hooks/useAuth', () => ({
+  useAuth: () => ({
+    user: { id: 1, username: 'alice', role: 'admin', created_at: '2026-01-01' } as User,
+    status: 'authenticated',
+    login: vi.fn(),
+    logout: vi.fn(),
+    isAdmin: true,
+    isRedteam: false,
+    isSoc: false,
+    canEditEngagements: true,
+  }),
+}));
+
+const USERS: User[] = [
+  { id: 1, username: 'alice', role: 'admin', created_at: '2026-01-01' },
+  { id: 2, username: 'bob', role: 'redteam', created_at: '2026-02-01' },
+  { id: 3, username: 'carol', role: 'soc', created_at: '2026-03-01' },
+];
+
+describe('UsersAdminPage', () => {
+  let mock: MockAdapter;
+
+  beforeEach(() => {
+    mock = new MockAdapter(apiClient);
+    mock.onGet('/users').reply(200, USERS);
+  });
+
+  afterEach(() => {
+    mock.restore();
+  });
+
+  it('renders the list of users from the API', async () => {
+    renderWithProviders(<UsersAdminPage />);
+    expect(await screen.findByText('alice')).toBeInTheDocument();
+    expect(screen.getByText('bob')).toBeInTheDocument();
+    expect(screen.getByText('carol')).toBeInTheDocument();
+  });
+
+  it('creates a user via POST /users and refreshes the list', async () => {
+    const newUser: User = { id: 4, username: 'dan', role: 'soc', created_at: '2026-04-01' };
+    const postSpy = vi.fn().mockReturnValue([201, newUser]);
+    mock.onPost('/users').reply((config) => postSpy(JSON.parse(config.data)));
+
+    const user = userEvent.setup();
+    renderWithProviders(<UsersAdminPage />);
+
+    await screen.findByText('alice');
+
+    await user.type(screen.getByLabelText(/^username/i), 'dan');
+    await user.type(screen.getByLabelText(/^password/i), 'sup3rs4fe!');
+    // role default is 'redteam'; switch to 'soc' to match newUser
+    await user.selectOptions(screen.getByLabelText(/^role/i), 'soc');
+
+    // After POST, hooks invalidate and the list refetches → return the new list
+    mock.onGet('/users').reply(200, [...USERS, newUser]);
+
+    await user.click(screen.getByRole('button', { name: /^create$/i }));
+
+    await waitFor(() => {
+      expect(postSpy).toHaveBeenCalledWith({
+        username: 'dan',
+        password: 'sup3rs4fe!',
+        role: 'soc',
+      });
+    });
+    expect(await screen.findByText('dan')).toBeInTheDocument();
+  });
+
+  it('opens the password reset form for the row that was clicked (fragment-key regression guard)', async () => {
+    const user = userEvent.setup();
+    renderWithProviders(<UsersAdminPage />);
+
+    await screen.findByText('bob');
+
+    // The "Reset password" button for bob lives in bob's row.
+    const bobRow = screen.getByText('bob').closest('tr');
+    expect(bobRow).not.toBeNull();
+    await user.click(within(bobRow as HTMLElement).getByRole('button', { name: /reset password/i }));
+
+    // The reset form for bob (and bob only) must appear.
+    expect(await screen.findByLabelText(/new password for bob/i)).toBeInTheDocument();
+    expect(screen.queryByLabelText(/new password for carol/i)).toBeNull();
+    expect(screen.queryByLabelText(/new password for alice/i)).toBeNull();
+  });
+
+  it('disables the delete button on the current user own row', async () => {
+    renderWithProviders(<UsersAdminPage />);
+    await screen.findByText('alice');
+
+    const aliceRow = screen.getByText('alice').closest('tr') as HTMLElement;
+    const bobRow = screen.getByText('bob').closest('tr') as HTMLElement;
+
+    expect(within(aliceRow).getByRole('button', { name: /delete/i })).toBeDisabled();
+    expect(within(bobRow).getByRole('button', { name: /delete/i })).toBeEnabled();
+  });
+});