Fix store images: remove search restriction from localPatterns

The `search: ''` setting in localPatterns was blocking image URLs
that include query parameters (width, quality, format). Removing
this restriction allows the /api/assets proxy URLs to pass through
Next.js image optimization.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/next.config.ts

@@ -6,7 +6,6 @@ const nextConfig: NextConfig = {
     localPatterns: [
       {
         pathname: '/api/assets/**',
-        search: '',
       },
     ],
     remotePatterns: [