Migration Angular 20 -> 21 : fin de la migration securite (0 vulnerabilite npm)

- ng update @angular/core@21 @angular/cli@21 (corrige GHSA-jrmj-c5cx-3cw6, XSS SVG)
- Migration automatique des templates vers le control flow natif (@if/@for, 138 fichiers)
- Correction des 5 `track` invalides generes par la migration (trackBy a 1 argument
  -> track $index) + suppression des fonctions trackBy mortes
- TypeScript 5.9, zone.js 0.15 ; npm audit : 0 vulnerabilite

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/src/app/shared/quest-status-badge/quest-status-badge.component.html

@@ -1,4 +1,6 @@
 <span [class]="cssClass" [attr.aria-label]="label" [title]="label">
   <lucide-icon [img]="icon" [size]="14"></lucide-icon>
-  <span class="status-label" *ngIf="!compact">{{ label }}</span>
+  @if (!compact) {
+    <span class="status-label">{{ label }}</span>
+  }
 </span>

web/src/app/shared/quest-status-badge/quest-status-badge.component.ts

@@ -1,5 +1,5 @@
 import { Component, Input } from '@angular/core';
-import { CommonModule } from '@angular/common';
+
 import { LucideAngularModule, Lock, Circle, Play, CheckCircle2, LucideIconData } from 'lucide-angular';
 import { QuestStatus } from '../../services/campaign.model';
 
@@ -9,7 +9,7 @@ import { QuestStatus } from '../../services/campaign.model';
  */
 @Component({
     selector: 'app-quest-status-badge',
-    imports: [CommonModule, LucideAngularModule],
+    imports: [LucideAngularModule],
     templateUrl: './quest-status-badge.component.html',
     styleUrls: ['./quest-status-badge.component.scss']
 })