refactor: useAuthFetch-hook för automatisk JWT-header i klientanrop

frontend/app/recipes/write/WriteRecipePage.tsx

@@ -2,7 +2,7 @@
 
 import { useState, useEffect } from 'react';
 import { useRouter } from 'next/navigation';
-import { useSession } from 'next-auth/react';
+import { useAuthFetch } from '../../../lib/use-auth-fetch';
 import { fetchJson } from '../../../lib/api';
 import { parseErrorResponse } from '../../../lib/error-handler';
 import type { Product } from '../../../features/inventory/types';
@@ -37,7 +37,7 @@ type Step = 'input' | 'review' | 'saving' | 'saved';
 
 export default function WriteRecipePage() {
   const router = useRouter();
-  const { data: session } = useSession();
+  const authFetch = useAuthFetch();
   const [step, setStep] = useState<Step>('input');
   const [markdown, setMarkdown] = useState('');
   const [parsed, setParsed] = useState<ParseResult | null>(null);
@@ -193,9 +193,8 @@ export default function WriteRecipePage() {
     };
 
     try {
-      const res = await fetch('/api/recipes', {
+      const res = await authFetch('/api/recipes', {
         method: 'POST',
-        headers: { 'Content-Type': 'application/json', Authorization: `Bearer ${session?.accessToken}` },
         body: JSON.stringify(body),
       });