refactor: remove JS vite config in favor of TypeScript version

frontend/vite.config.js

@@ -1,19 +0,0 @@
-import { defineConfig } from 'vite'
-import { svelte } from '@sveltejs/vite-plugin-svelte'
-
-export default defineConfig({
-  plugins: [svelte()],
-  server: {
-    port: 5173,
-    proxy: {
-      '/api': {
-        target: 'http://localhost:3000',
-        changeOrigin: true
-      }
-    }
-  },
-  build: {
-    outDir: 'dist',
-    emptyOutDir: true
-  }
-})