refactor(frontend): modernise la mise en page du tableau de bord

- ligne d'état « Actualisé à HH:mm:ss · N sites suivis » avec un point animé,
  figé sous prefers-reduced-motion
- indicateurs en cartes : libellé en capitales, grand nombre en chiffres
  tabulaires, filet supérieur, ombre au survol ; la barre de charge moyenne
  passe au jaune à 70 % et au rouge à 90 %, avec un texte d'aide
- grille à deux colonnes : graphique de charge et prévisions à gauche, flux
  d'alertes en colonne collante à droite, une colonne sous 900 px
- prévisions présentées en tableau (site, prévision, échéance, lien détail)
- liens de navigation de l'en-tête restylés en pastilles, par SCSS seulement :
  le bloc HTML de navigation est inchangé octet pour octet
- styles de tableau sortis dans _tables.scss (.ev-table, .ev-table-card), la
  liste des sites les adopte au lieu de sa copie locale

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

@@ -32,69 +32,115 @@
   }
 
   @if (stats(); as s) {
-    <section class="overview">
+    <p class="dashboard__status">
-      <ev-card class="card card--gauge">
+      <span class="dashboard__pulse" aria-hidden="true"></span>
-        <span class="card__label">Consommation vs capacité</span>
+      Actualisé à {{ s.timestamp | date: 'HH:mm:ss' }} · {{ s.total_sites }} sites suivis
+    </p>
+
+    <section class="overview" aria-label="Indicateurs du parc">
+      <ev-card class="kpi kpi--gauge">
+        <span class="kpi__label">Consommation vs capacité</span>
         <app-consumption-gauge
           [consumption]="s.total_consumption_kw"
           [capacity]="s.total_capacity_kw"
         />
-        <span class="card__value"
+        <span class="kpi__value">
-          >{{ s.total_consumption_kw | number: '1.0-1' }} /
+          {{ s.total_consumption_kw | number: '1.0-1' }}
-          {{ s.total_capacity_kw | number }} kW</span
+          <small>/ {{ s.total_capacity_kw | number }} kW</small>
+        </span>
+      </ev-card>
+
+      <ev-card class="kpi">
+        <span class="kpi__label">Charge moyenne du parc</span>
+        <span class="kpi__value"
+          >{{ s.average_load_percent | number: '1.0-0' }} <small>%</small></span
         >
-      </ev-card>
+        <div
-
+          class="progress-bar"
-      <ev-card class="card">
+          role="progressbar"
-        <span class="card__label">Charge moyenne du parc</span>
+          aria-valuemin="0"
-        <span class="card__value">{{ s.average_load_percent }} %</span>
+          aria-valuemax="100"
-        <div class="progress-bar">
+          [attr.aria-valuenow]="s.average_load_percent"
-          <div class="progress-bar__fill" [style.width.%]="s.average_load_percent"></div>
+        >
+          <div
+            class="progress-bar__fill"
+            [class]="'progress-bar__fill--' + loadTone(s.average_load_percent)"
+            [style.width.%]="s.average_load_percent"
+          ></div>
         </div>
+        <span class="kpi__hint">{{ loadHint(s.average_load_percent) }}</span>
       </ev-card>
 
-      <ev-card class="card">
+      <ev-card class="kpi">
-        <span class="card__label">Sites suivis</span>
+        <span class="kpi__label">Sites suivis</span>
-        <span class="card__value">{{ s.total_sites }}</span>
+        <span class="kpi__value">{{ s.total_sites }}</span>
+        <a routerLink="/sites" class="ev-link kpi__link">Voir la liste des sites</a>
       </ev-card>
     </section>
-
-    <section class="chart-section">
-      <h2>Charge et alerte visuelle par site</h2>
-      <app-site-load-chart [sites]="s.sites" />
-    </section>
   }
 
-  <section class="alerts-section">
+  <div class="dashboard__grid">
-    <app-alert-feed />
+    <div class="dashboard__main">
-  </section>
+      @if (stats(); as s) {
+        <section class="chart-section">
+          <h2>Charge par site</h2>
+          <ev-card class="chart-card">
+            <app-site-load-chart [sites]="s.sites" />
+          </ev-card>
+        </section>
+      }
 
-  @if (predictions().length > 0) {
+      <section class="predictions-section">
-    <section class="predictions-section">
+        <h2>Prévisions de consommation</h2>
-      <h2>Prévisions de consommation</h2>
+        @if (predictions().length > 0) {
-      <ul class="predictions-list">
+          <ev-card class="ev-table-card">
-        @for (site of predictions(); track site.site_id) {
+            <table class="ev-table">
-          <li class="prediction-item">
+              <thead>
-            <span class="prediction-item__site">{{ site.site_name }}</span>
+                <tr>
-            @if (site.prediction; as prediction) {
+                  <th>Site</th>
-              @if (prediction.status === 'available') {
+                  <th>Prévision</th>
-                <span class="prediction-item__value">
+                  <th>Échéance</th>
-                  {{ prediction.predicted_value | number: '1.0-1' }} kWh
+                  <th></th>
-                  <span class="prediction-item__target">{{
+                </tr>
-                    prediction.target_at | date: "dd/MM 'à' HH:mm"
+              </thead>
-                  }}</span>
+              <tbody>
-                </span>
+                @for (site of predictions(); track site.site_id) {
-              } @else {
+                  <tr>
-                <ev-badge [tone]="badgeToneForPredictionStatus(prediction.status)">{{
+                    <td>{{ site.site_name }}</td>
-                  prediction.status === 'insufficient_data' ? 'Historique insuffisant' : 'Erreur'
+                    @if (site.prediction; as prediction) {
-                }}</ev-badge>
+                      @if (prediction.status === 'available') {
-              }
+                        <td class="ev-table__number">
-            } @else {
+                          {{ prediction.predicted_value | number: '1.0-1' }} kWh
-              <ev-badge tone="neutral">Pas encore de prévision</ev-badge>
+                        </td>
-            }
+                        <td>{{ prediction.target_at | date: "dd/MM 'à' HH:mm" }}</td>
-          </li>
+                      } @else {
+                        <td>
+                          <ev-badge [tone]="badgeToneForPredictionStatus(prediction.status)">{{
+                            prediction.status === 'insufficient_data'
+                              ? 'Historique insuffisant'
+                              : 'Erreur'
+                          }}</ev-badge>
+                        </td>
+                        <td class="ev-table__muted">-</td>
+                      }
+                    } @else {
+                      <td><ev-badge tone="neutral">Pas encore de prévision</ev-badge></td>
+                      <td class="ev-table__muted">-</td>
+                    }
+                    <td><a [routerLink]="['/sites', site.site_id]" class="ev-link">Détail</a></td>
+                  </tr>
+                }
+              </tbody>
+            </table>
+          </ev-card>
+        } @else if (!predictionsError()) {
+          <p class="dashboard__empty">Aucune prévision disponible pour le moment.</p>
         }
-      </ul>
+      </section>
-    </section>
+    </div>
-  }
+
+    <aside class="dashboard__side" aria-label="Alertes actives">
+      <app-alert-feed />
+    </aside>
+  </div>
 </div>

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

@@ -8,9 +8,11 @@
 
 .dashboard__header {
   display: flex;
+  flex-wrap: wrap;
   align-items: flex-start;
   justify-content: space-between;
-  margin-bottom: 2rem;
+  gap: var(--space-3);
+  margin-bottom: var(--space-3);
 }
 
 .dashboard__brand {
@@ -20,8 +22,9 @@
 
   h1 {
     margin: 0;
-    font-size: 1.75rem;
+    font-size: var(--font-size-xl);
     font-weight: 700;
+    letter-spacing: -0.01em;
   }
 }
 
@@ -31,19 +34,69 @@
 
 .dashboard__subtitle {
   margin: 0.25rem 0 0;
+  font-size: var(--font-size-sm);
   color: var(--color-text-muted);
 }
 
 .dashboard__actions {
   display: flex;
+  flex-wrap: wrap;
   align-items: center;
-  gap: 1rem;
+  gap: var(--space-2);
+
+  .ev-link {
+    padding: 0.45rem 0.9rem;
+    border-radius: var(--radius-pill);
+    background: var(--color-primary-light);
+    color: var(--color-primary-hover);
+    font-size: var(--font-size-sm);
+    transition: background 0.15s ease;
+
+    &:hover {
+      background: var(--color-primary);
+      color: var(--color-text-inverse);
+      text-decoration: none;
+    }
+  }
+}
+
+.dashboard__status {
+  display: flex;
+  align-items: center;
+  gap: var(--space-2);
+  margin: 0 0 var(--space-4);
+  font-size: var(--font-size-sm);
+  color: var(--color-text-muted);
+}
+
+.dashboard__pulse {
+  width: 0.6rem;
+  height: 0.6rem;
+  border-radius: 50%;
+  background: var(--color-success);
+  animation: pulse 2s ease-out infinite;
+}
+
+@keyframes pulse {
+  0% {
+    box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.45);
+  }
+
+  100% {
+    box-shadow: 0 0 0 8px rgba(22, 163, 74, 0);
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .dashboard__pulse {
+    animation: none;
+  }
 }
 
 h2 {
-  font-size: 1.1rem;
+  margin: 0 0 var(--space-3);
+  font-size: var(--font-size-lg);
   font-weight: 600;
-  margin: 0 0 1rem;
 }
 
 .banner-error {
@@ -54,97 +107,124 @@ h2 {
 .overview {
   display: grid;
   grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
-  gap: 1rem;
+  gap: var(--space-3);
-  margin-bottom: 2.5rem;
+  margin-bottom: var(--space-5);
 }
 
-.card {
+.kpi {
-  padding: 1.25rem;
+  position: relative;
-  gap: 0.35rem;
+  overflow: hidden;
+  padding: var(--space-4);
+  gap: var(--space-1);
+  transition:
+    box-shadow 0.15s ease,
+    transform 0.15s ease;
+
+  &::before {
+    content: '';
+    position: absolute;
+    inset: 0 0 auto 0;
+    height: 3px;
+    background: var(--color-primary);
+  }
+
+  &:hover {
+    box-shadow: var(--shadow-card-hover);
+    transform: translateY(-1px);
+  }
 }
 
-.card--gauge {
+.kpi--gauge {
   align-items: center;
   text-align: center;
 }
 
-.card--link {
+.kpi__label {
-  cursor: pointer;
+  font-size: var(--font-size-xs);
-  transition: border-color 0.15s ease;
+  font-weight: 600;
+  color: var(--color-text-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+}
 
-  &:hover {
+.kpi__value {
-    border-color: var(--color-primary);
+  font-size: var(--font-size-2xl);
+  font-weight: 700;
+  line-height: 1.1;
+  font-variant-numeric: tabular-nums;
+
+  small {
+    font-size: var(--font-size-sm);
+    font-weight: 500;
+    color: var(--color-text-muted);
   }
 }
 
-.card__label {
+.kpi__hint {
-  font-size: 0.8rem;
+  font-size: var(--font-size-xs);
   color: var(--color-text-muted);
-  text-transform: uppercase;
-  letter-spacing: 0.02em;
 }
 
-.card__value {
+.kpi__link {
-  font-size: 1.6rem;
+  margin-top: auto;
-  font-weight: 700;
+  font-size: var(--font-size-sm);
 }
 
 .progress-bar {
-  height: 6px;
+  height: 8px;
+  margin: var(--space-1) 0;
   background: var(--color-border-light);
   border-radius: var(--radius-pill);
   overflow: hidden;
-  margin-top: 0.25rem;
 }
 
 .progress-bar__fill {
   height: 100%;
-  background: var(--color-primary);
   border-radius: var(--radius-pill);
+  background: var(--color-success);
   transition: width 0.3s ease;
 }
 
+.progress-bar__fill--warning {
+  background: var(--color-warning);
+}
+
+.progress-bar__fill--danger {
+  background: var(--color-danger);
+}
+
+.dashboard__grid {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) minmax(320px, 380px);
+  gap: var(--space-4);
+  align-items: start;
+}
+
+.dashboard__side {
+  position: sticky;
+  top: var(--space-3);
+}
+
 .chart-section {
-  margin-bottom: 2.5rem;
+  margin-bottom: var(--space-5);
 }
 
-.alerts-section {
+.chart-card {
-  margin-bottom: 2.5rem;
+  padding: var(--space-3);
 }
 
-.predictions-list {
+.dashboard__empty {
-  list-style: none;
   margin: 0;
-  padding: 0;
+  font-size: var(--font-size-sm);
-  display: flex;
-  flex-direction: column;
-  gap: 0.5rem;
-}
-
-.prediction-item {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  gap: 0.75rem;
-  padding: 0.7rem 1rem;
-  border-radius: var(--radius-md);
-  background: var(--color-surface);
-  border: 1px solid var(--color-border-light);
-}
-
-.prediction-item__site {
-  font-size: 0.9rem;
-  font-weight: 600;
-}
-
-.prediction-item__value {
-  font-size: 0.9rem;
-  font-weight: 600;
-}
-
-.prediction-item__target {
-  margin-left: 0.35rem;
-  font-size: 0.8rem;
-  font-weight: 400;
   color: var(--color-text-muted);
 }
+
+@media (max-width: 900px) {
+  .dashboard__grid {
+    grid-template-columns: 1fr;
+  }
+
+  .dashboard__side {
+    position: static;
+  }
+}

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

@@ -161,6 +161,71 @@ describe('Dashboard', () => {
     expect(navigateSpy).toHaveBeenCalledWith(['/login']);
   });
 
+  it('affiche l’heure du dernier relevé et les indicateurs du parc', () => {
+    vi.useFakeTimers();
+    const { fixture } = setup({
+      stats: of({
+        timestamp: '2026-09-18T09:00:00Z',
+        total_sites: 7,
+        total_consumption_kw: 1234.5,
+        total_capacity_kw: 5000,
+        average_load_percent: 24.7,
+        sites: [],
+      }),
+    });
+
+    fixture.detectChanges();
+    vi.advanceTimersByTime(1);
+    fixture.detectChanges();
+
+    const texte = fixture.nativeElement.textContent as string;
+    expect(texte).toContain('Actualisé à');
+    expect(texte).toContain('7 sites suivis');
+    expect(texte).toContain('Marge confortable');
+    expect(fixture.nativeElement.querySelector('.progress-bar__fill--success')).not.toBeNull();
+  });
+
+  it('présente les prévisions en tableau avec un lien vers chaque site', () => {
+    const { fixture } = setup({
+      predictions: predictionsMock([
+        {
+          site_id: 'SITE001',
+          site_name: 'Usine Nantes',
+          prediction: {
+            target_at: '2026-09-18T10:00:00Z',
+            target_metric: 'consumption_kwh',
+            period_minutes: 60,
+            predicted_value: 118.4,
+            status: 'available',
+            failure_reason: null,
+            model_reference: 'lightgbm-v1',
+            created_at: '2026-09-18T09:00:00Z',
+          },
+        },
+        { site_id: 'SITE002', site_name: 'Bureau Lille', prediction: null },
+      ]),
+    });
+
+    fixture.detectChanges();
+
+    const table = fixture.nativeElement.querySelector('table.ev-table');
+    expect(table).not.toBeNull();
+    expect(table.textContent).toContain('118.4 kWh');
+    expect(table.textContent).toContain('Pas encore de prévision');
+    expect(fixture.nativeElement.querySelector('a[href="/sites/SITE001"]')).not.toBeNull();
+  });
+
+  it('colore la charge moyenne selon les seuils 70 % et 90 %', () => {
+    const { fixture } = setup();
+    const dashboard = fixture.componentInstance;
+
+    expect(dashboard.loadTone(69.9)).toBe('success');
+    expect(dashboard.loadTone(70)).toBe('warning');
+    expect(dashboard.loadTone(89.9)).toBe('warning');
+    expect(dashboard.loadTone(90)).toBe('danger');
+    expect(dashboard.loadHint(95)).toBe('Proche de la capacité du parc');
+  });
+
   it('distingue le ton des statuts de prévision', () => {
     const { fixture } = setup();
     const dashboard = fixture.componentInstance;

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

@@ -30,6 +30,11 @@ const TON_PAR_STATUT_PREDICTION: Record<PredictionStatus, BadgeTone> = {
   error: 'danger',
 };
 
+const SEUIL_CHARGE_SOUTENUE = 70;
+const SEUIL_CHARGE_CRITIQUE = 90;
+
+export type LoadTone = 'success' | 'warning' | 'danger';
+
 @Component({
   selector: 'app-dashboard',
   standalone: true,
@@ -97,6 +102,24 @@ export class Dashboard implements OnInit {
     return TON_PAR_STATUT_PREDICTION[status];
   }
 
+  loadTone(percent: number): LoadTone {
+    if (percent >= SEUIL_CHARGE_CRITIQUE) {
+      return 'danger';
+    }
+    return percent >= SEUIL_CHARGE_SOUTENUE ? 'warning' : 'success';
+  }
+
+  loadHint(percent: number): string {
+    switch (this.loadTone(percent)) {
+      case 'danger':
+        return 'Proche de la capacité du parc';
+      case 'warning':
+        return 'Charge soutenue';
+      default:
+        return 'Marge confortable';
+    }
+  }
+
   onLogout(): void {
     this.auth.logout().subscribe({
       next: () => this.router.navigate(['/login']),

apps/frontend/src/app/features/sites/site-list/site-list.html

@@ -17,8 +17,8 @@
     <ev-alert severity="danger" class="banner-error">{{ message }}</ev-alert>
   }
 
-  <ev-card class="table-card">
+  <ev-card class="ev-table-card">
-    <table class="sites-table">
+    <table class="ev-table">
       <thead>
         <tr>
           <th>Nom</th>
@@ -36,7 +36,9 @@
             <td>{{ site.site_type }}</td>
             <td>{{ site.location || '-' }}</td>
             <td>{{ site.capacity_kw ?? '-' }}</td>
-            <td><ev-badge [tone]="badgeToneForStatus(site.status)">{{ site.status ?? '-' }}</ev-badge></td>
+            <td>
+              <ev-badge [tone]="badgeToneForStatus(site.status)">{{ site.status ?? '-' }}</ev-badge>
+            </td>
             <td><a [routerLink]="['/sites', site.site_id]" class="ev-link">Détail</a></td>
           </tr>
         }

apps/frontend/src/app/features/sites/site-list/site-list.scss

@@ -32,32 +32,3 @@
   display: block;
   margin: 0 0 1.5rem;
 }
-
-.table-card {
-  padding: 0;
-  overflow: hidden;
-}
-
-.sites-table {
-  width: 100%;
-  border-collapse: collapse;
-
-  th,
-  td {
-    padding: 0.85rem 1.25rem;
-    text-align: left;
-    border-bottom: 1px solid var(--color-border-light);
-  }
-
-  th {
-    font-size: 0.8rem;
-    color: var(--color-text-muted);
-    text-transform: uppercase;
-    letter-spacing: 0.02em;
-    font-weight: 600;
-  }
-
-  tr:last-child td {
-    border-bottom: none;
-  }
-}

apps/frontend/src/styles.scss

@@ -2,6 +2,7 @@
 @use 'styles/forms';
 @use 'styles/auth-page';
 @use 'styles/links';
+@use 'styles/tables';
 
 body {
   margin: 0;

apps/frontend/src/styles/_tables.scss

@@ -0,0 +1,41 @@
+.ev-table-card {
+  padding: 0;
+  overflow: hidden;
+}
+
+.ev-table {
+  width: 100%;
+  border-collapse: collapse;
+
+  th,
+  td {
+    padding: 0.85rem 1.25rem;
+    text-align: left;
+    border-bottom: 1px solid var(--color-border-light);
+  }
+
+  th {
+    font-size: var(--font-size-xs);
+    font-weight: 600;
+    color: var(--color-text-muted);
+    text-transform: uppercase;
+    letter-spacing: 0.04em;
+  }
+
+  tbody tr:last-child td {
+    border-bottom: none;
+  }
+
+  tbody tr:hover td {
+    background: var(--color-bg);
+  }
+}
+
+.ev-table__number {
+  font-weight: 600;
+  font-variant-numeric: tabular-nums;
+}
+
+.ev-table__muted {
+  color: var(--color-text-muted);
+}