feat(frontend): supervision des capteurs par site (admin)

apps/frontend/src/app/features/dashboard/dashboard.html

@@ -10,6 +10,9 @@
       </div>
     </div>
     <div class="dashboard__actions">
+      @if (auth.principal()?.role === 'admin') {
+        <a routerLink="/monitoring/sensors" class="ev-link">Supervision des capteurs</a>
+       }
       <a routerLink="/sites" class="ev-link">Voir les sites</a>
       <ev-button
         class="logout-button"

apps/frontend/src/app/features/dashboard/dashboard.scss

@@ -68,6 +68,15 @@ h2 {
   text-align: center;
 }
 
+.card--link {
+  cursor: pointer;
+  transition: border-color 0.15s ease;
+
+  &:hover {
+    border-color: var(--color-primary);
+  }
+}
+
 .card__label {
   font-size: 0.8rem;
   color: var(--color-text-muted);

apps/frontend/src/app/features/dashboard/dashboard.spec.ts

@@ -101,8 +101,11 @@ describe('Dashboard', () => {
   it('appelle logout et redirige vers /login au clic sur le bouton de déconnexion', () => {
   const statsMock = { getSummary: vi.fn().mockReturnValue(of({ total_sites: 7, sites: [] })) };
   const alertsMock = { getAlerts: vi.fn().mockReturnValue(of([])) };
-  const authMock = { logout: vi.fn().mockReturnValue(of(undefined)), clearSession: vi.fn() };
-
+  const authMock = {
+    logout: vi.fn().mockReturnValue(of(undefined)),
+    clearSession: vi.fn(),
+    principal: vi.fn().mockReturnValue({ role: 'admin' }),
+  };
   TestBed.configureTestingModule({
     imports: [Dashboard],
     providers: [
@@ -128,9 +131,10 @@ describe('Dashboard', () => {
   it('déconnecte localement et redirige vers /login même si logout échoue côté réseau', () => {
   const statsMock = { getSummary: vi.fn().mockReturnValue(of({ total_sites: 7, sites: [] })) };
   const alertsMock = { getAlerts: vi.fn().mockReturnValue(of([])) };
-  const authMock = {
+    const authMock = {
     logout: vi.fn().mockReturnValue(throwError(() => new Error('réseau indisponible'))),
     clearSession: vi.fn(),
+    principal: vi.fn().mockReturnValue({ role: 'admin' }),
   };
   TestBed.configureTestingModule({
     imports: [Dashboard],

apps/frontend/src/app/features/dashboard/dashboard.ts

@@ -47,7 +47,7 @@ const TON_PAR_SEVERITE: Record<AlertSeverity, BadgeTone> = {
 export class Dashboard implements OnInit {
   private statsService = inject(StatsService);
   private alertsService = inject(AlertsService);
-  private auth = inject(AuthService);
+  public auth = inject(AuthService);
   private router = inject(Router);
   private destroyRef = inject(DestroyRef);