feat: Add scraper version selector to frontend

- Add version selector dropdown in scrape confirmation modal
- Default to v1.1.0 (Multi-Sort) which bypasses ~1000 review limit
- Pass scraper_version through API proxy to backend
- Update /new page fallback to show v1.1.0 as available
- Show version description explaining multi-sort benefits

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

web/app/api/scrape/route.ts

@@ -5,23 +5,25 @@ const API_BASE_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000';
 export async function POST(request: NextRequest) {
   try {
     const body = await request.json();
-    const { url, business_name, business_address, rating_snapshot, total_reviews_snapshot } = body;
+    const { url, business_name, business_address, rating_snapshot, total_reviews_snapshot, scraper_version } = body;
 
     if (!url) {
       return NextResponse.json({ error: 'URL is required' }, { status: 400 });
     }
 
-    // Call the containerized scraper API with business metadata
+    // Call the containerized scraper API with business metadata and version
     const response = await fetch(`${API_BASE_URL}/scrape`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({
         url,
+        scraper_version,  // Pass version to backend for routing
         metadata: {
           business_name,
           business_address,
           rating_snapshot,
           total_reviews_snapshot,
+          scraper_version,  // Also store in metadata for job tracking
         },
       }),
     });