feat: add public listing detail web flow

apps/web/src/services/catalog-service.js

@@ -1,4 +1,4 @@
-const apiBaseUrl = import.meta.env.VITE_API_BASE_URL ?? 'http://localhost:3000/api/v1';
+const apiBaseUrl = import.meta.env?.VITE_API_BASE_URL ?? 'http://localhost:3000/api/v1';
 
 export async function searchCatalog({ query = '', page = 1, limit = 20 } = {}) {
   const params = new URLSearchParams({ query, page: String(page), limit: String(limit) });
@@ -8,6 +8,17 @@ export async function searchCatalog({ query = '', page = 1, limit = 20 } = {}) {
     throw new Error('Catalog search is unavailable.');
   }
 
+  const payload = await response.json();
+  return payload.data;
+}
+
+export async function getPublicListing(id) {
+  const response = await fetch(`${apiBaseUrl}/public/listings/${encodeURIComponent(id)}`);
+
+  if (!response.ok) {
+    throw new Error(response.status === 404 ? 'Listing not found.' : 'Listing is unavailable.');
+  }
+
   const payload = await response.json();
   return payload.data;
 }