feat: replace product search with searchable combobox in banner builder

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

src/app/api/products/search-list/route.ts

@@ -0,0 +1,42 @@
+import { NextRequest, NextResponse } from 'next/server'
+
+const API_VERSION = '2024-01'
+
+// GET /api/products/search-list?q=peinture
+// Retourne jusqu'à 10 produits correspondant à la recherche (titre ou SKU)
+export async function GET(req: NextRequest) {
+  const q = new URL(req.url).searchParams.get('q')?.trim()
+  if (!q || q.length < 2) return NextResponse.json([])
+
+  const domain = process.env.SHOPIFY_STORE_DOMAIN
+  const token = process.env.SHOPIFY_ADMIN_API_TOKEN
+  if (!domain || !token) return NextResponse.json([], { status: 500 })
+
+  const headers = { 'X-Shopify-Access-Token': token }
+  const baseUrl = `https://${domain}/admin/api/${API_VERSION}`
+
+  try {
+    // Recherche par titre
+    const res = await fetch(
+      `${baseUrl}/products.json?title=${encodeURIComponent(q)}&limit=10&fields=id,title,variants`,
+      { headers },
+    )
+    if (!res.ok) return NextResponse.json([])
+    const data = await res.json()
+    const products = (data.products ?? []) as Array<{
+      id: number
+      title: string
+      variants: Array<{ sku: string }>
+    }>
+
+    const results = products.map(p => ({
+      shopifyId: String(p.id),
+      title: p.title,
+      sku: p.variants[0]?.sku ?? '',
+    }))
+
+    return NextResponse.json(results)
+  } catch {
+    return NextResponse.json([])
+  }
+}