Checkout: forward only the checkout fields, show clear errors, fix the contact form (#16)

Co-authored-by: Michael Czechowski <mail@librete.ch>

server/api/orders/[uuid].get.ts

@@ -1,4 +1,4 @@
-import { fetchCms } from "~/server/utils/cmsApi";
+import { forwardToCms } from "~/server/utils/cmsApi";
 
 export default defineEventHandler(async (event) => {
 	const uuid = getRouterParam(event, "uuid");
@@ -6,5 +6,5 @@ export default defineEventHandler(async (event) => {
 		throw createError({ statusCode: 400, statusMessage: "Missing order UUID" });
 	}
 
-	return await fetchCms(`/orders/${uuid}/cart`);
+	return await forwardToCms(`/orders/${uuid}/cart`);
 });