visual testing

frontend/vite.config.ts

@@ -1,8 +1,17 @@
 import { defineConfig } from 'vite'
+import { resolve } from 'path'
 import vue from '@vitejs/plugin-vue'
 
 export default defineConfig({
   plugins: [vue()],
+  build: {
+    rollupOptions: {
+      input: {
+        main: resolve(__dirname, 'index.html'),
+        'render-test': resolve(__dirname, 'render-test.html'),
+      },
+    },
+  },
   resolve: {
     dedupe: [
       '@codemirror/state',