More webapp changes+fixes

webapp/src/app/core/services/settings.service.ts

@@ -0,0 +1,32 @@
+import { Injectable, signal } from '@angular/core';
+
+const EXPERT_MODE_KEY = 'scn_expert_mode';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SettingsService {
+  private _expertMode = signal(false);
+
+  expertMode = this._expertMode.asReadonly();
+
+  constructor() {
+    this.loadFromStorage();
+  }
+
+  private loadFromStorage(): void {
+    const stored = localStorage.getItem(EXPERT_MODE_KEY);
+    if (stored === 'true') {
+      this._expertMode.set(true);
+    }
+  }
+
+  setExpertMode(enabled: boolean): void {
+    localStorage.setItem(EXPERT_MODE_KEY, String(enabled));
+    this._expertMode.set(enabled);
+  }
+
+  toggleExpertMode(): void {
+    this.setExpertMode(!this._expertMode());
+  }
+}