Changement dans la config pour éviter les url en dur + mise en place d'un mode démo

web/src/app/sidebar/sidebar.component.html

@@ -53,11 +53,11 @@
       <lucide-icon [img]="Dices" [size]="16"></lucide-icon>
       <span>Systèmes de JDR</span>
     </button>
-    <button class="tool-btn">
+    <button class="tool-btn" *ngIf="!config.demoMode">
       <lucide-icon [img]="Download" [size]="16"></lucide-icon>
       <span>Export VTT</span>
     </button>
-    <button class="tool-btn" [class.active]="currentRoute.startsWith('/settings')" (click)="navigateTo('/settings')">
+    <button class="tool-btn" *ngIf="!config.demoMode" [class.active]="currentRoute.startsWith('/settings')" (click)="navigateTo('/settings')">
       <lucide-icon [img]="Settings" [size]="16"></lucide-icon>
       <span>Paramètres</span>
     </button>

web/src/app/sidebar/sidebar.component.ts

@@ -4,6 +4,7 @@ import { Router } from '@angular/router';
 import { LucideAngularModule, Search, Download, Settings, ArrowLeft, Dices } from 'lucide-angular';
 import { LayoutService } from '../services/layout.service';
 import { GlobalSearchService } from '../services/global-search.service';
+import { ConfigService } from '../services/config.service';
 // Single source of truth pour la version affichée dans le footer :
 // on lit directement package.json à la compilation (resolveJsonModule).
 import packageJson from '../../../package.json';
@@ -30,7 +31,8 @@ export class SidebarComponent {
   constructor(
     private router: Router,
     private layoutService: LayoutService,
-    private globalSearch: GlobalSearchService
+    private globalSearch: GlobalSearchService,
+    public config: ConfigService
   ) {
     this.router.events.subscribe(() => {
       this.currentRoute = this.router.url;