feat(api): implement retry logic for Mistral API calls in receipt import and AI services

frontend/app/api/products/route.ts

@@ -1,19 +1,21 @@
-import { NextResponse } from 'next/server';
-import { auth } from '../../../auth';
+import { NextRequest, NextResponse } from 'next/server';
+import { getAuthHeaders } from '../../../lib/auth-headers';
 
 const API_BASE = process.env.NEXT_PUBLIC_API_URL_INTERNAL || 'http://recipe-api:8080';
 
-export const GET = auth(async function GET(req) {
-  const token = (req.auth as any)?.accessToken as string | undefined;
-  if (!token) return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+export async function GET(req: NextRequest) {
+  const authHeaders = await getAuthHeaders();
+  if (!authHeaders.Authorization) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
 
   const url = new URL(req.url);
   const query = url.searchParams.toString();
   const res = await fetch(`${API_BASE}/api/products${query ? `?${query}` : ''}`, {
-    headers: { Authorization: `Bearer ${token}` },
+    headers: authHeaders,
     cache: 'no-store',
   });
 
   const data = await res.json();
   return NextResponse.json(data, { status: res.status });
-});
+}