update base path in vite config

vite.config.ts

@@ -2,7 +2,8 @@ import { defineConfig } from "vitest/config";
 import react from "@vitejs/plugin-react";
 
 export default defineConfig({
-  base: "/OpenXD/",
+  // Keep build assets portable across domain roots and repository subpaths.
+  base: "./",
   plugins: [react()],
   test: {
     environment: "jsdom",