feat: add Master Admin application functionality

src/app/core/services/user-context.service.ts

@@ -0,0 +1,32 @@
+import { HttpClient } from '@angular/common/http';
+import { Injectable, inject, signal } from '@angular/core';
+import { map, Observable, tap } from 'rxjs';
+import { API_CONFIG } from '../config/api.config';
+import { CurrentUserContext } from '../models/context.model';
+
+@Injectable({ providedIn: 'root' })
+export class UserContextService {
+  private readonly http = inject(HttpClient);
+  readonly currentUserContext = signal<CurrentUserContext | null>(null);
+
+  loadCurrentUserProfile(): Observable<CurrentUserContext> {
+    return this.http.get<Partial<CurrentUserContext>>(`${API_CONFIG.baseUrl}${API_CONFIG.endpoints.currentUserProfile}`).pipe(
+      map((response) => ({
+        id: response.id?.trim() ?? '',
+        email: response.email?.trim() ?? '',
+        displayName: response.displayName?.trim() || undefined,
+        fullName: response.fullName?.trim() || undefined,
+        tenantId: response.tenantId?.trim() || undefined,
+        roles: response.roles ?? [],
+        defaultLandingPage: response.defaultLandingPage?.trim() || undefined,
+      })),
+      tap((profile) => {
+        this.currentUserContext.set(profile);
+      })
+    );
+  }
+
+  clear(): void {
+    this.currentUserContext.set(null);
+  }
+}