Session 28: Parlay builder, line movement tracker, book comparison — 3 features, zero credits (1623 tests)

web/src/app/api/books/[...path]/route.ts

@@ -0,0 +1,25 @@
+import { NextRequest, NextResponse } from 'next/server';
+
+export const dynamic = 'force-dynamic';
+
+const BACKEND_URL = process.env.BACKEND_URL || 'http://localhost:3000';
+
+/**
+ * Book-comparison proxy (Session 28). Forwards /api/books/* to Express
+ * (best lines + per-prop book grid). Read-only, zero-credit.
+ */
+export async function GET(req: NextRequest, { params }: { params: Promise<{ path: string[] }> }) {
+  const { path } = await params;
+  const segments = (path || []).map(encodeURIComponent).join('/');
+  const qs = req.nextUrl.search;
+  try {
+    const upstream = await fetch(`${BACKEND_URL}/api/books/${segments}${qs}`, {
+      method: 'GET',
+      headers: { Accept: 'application/json' },
+    });
+    const data = await upstream.json().catch(() => ({}));
+    return NextResponse.json(data, { status: upstream.status });
+  } catch {
+    return NextResponse.json({ bestLines: [], books: [] }, { status: 200 });
+  }
+}