feat: use PUBLIC_API_URL as api base url in production

Author: tknkaa

packages/web/src/lib/api.ts

@@ -1,4 +1,8 @@
 import { edenTreaty } from "@elysiajs/eden";
 import type { App } from "@packages/server";
 
-export const api = edenTreaty<App>(window.location.origin, {}).api;
+// In production, PUBLIC_API_URL should be set to the backend URL.
+// In development, falls back to window.location.origin and use Vite's proxy to forward API requests to the backend.
+const baseUrl = import.meta.env.PUBLIC_API_URL ?? window.location.origin;
+
+export const api = edenTreaty<App>(baseUrl, {}).api;