feat(auth): implement user authentication with JWT and NextAuth

- Added user registration and login functionality with JWT authentication.
- Created auth controller, service, and module in the backend.
- Implemented user model and user products management.
- Integrated NextAuth for session management on the frontend.
- Added middleware for protecting routes and handling public access.
- Updated frontend API routes to include authorization headers.
- Enhanced recipe and user product models to support ownership and visibility.
- Created registration and login pages in the frontend.
- Added necessary types for NextAuth session management.

frontend/app/baslager/actions.ts

@@ -2,11 +2,12 @@
 
 import { revalidatePath } from 'next/cache';
 import { API_BASE } from '../../lib/api';
+import { getAuthHeaders } from '../../lib/auth-headers';
 
 export async function addPantryItem(productId: number) {
   const res = await fetch(`${API_BASE}/api/pantry`, {
     method: 'POST',
-    headers: { 'Content-Type': 'application/json' },
+    headers: { 'Content-Type': 'application/json', ...(await getAuthHeaders()) },
     body: JSON.stringify({ productId }),
     cache: 'no-store',
   });
@@ -22,6 +23,7 @@ export async function addPantryItem(productId: number) {
 export async function removePantryItem(id: number) {
   const res = await fetch(`${API_BASE}/api/pantry/${id}`, {
     method: 'DELETE',
+    headers: { ...(await getAuthHeaders()) },
     cache: 'no-store',
   });