chore: simplify env config

vite.config.js

@@ -0,0 +1,31 @@
+// @ts-check
+import tailwindcss from '@tailwindcss/vite'
+import react from '@vitejs/plugin-react-swc'
+import 'dotenv/config'
+import process from 'node:process'
+import { dirname, resolve } from 'path'
+import { fileURLToPath } from 'url'
+import { defineConfig } from 'vite'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = dirname(__filename)
+
+/** @type {import('vite').UserConfig} */
+const config = {
+	// https://vite.dev/config/
+	base: './',
+	plugins: [react(), tailwindcss()],
+	resolve: {
+		alias: {
+			'@': resolve(__dirname, 'src'),
+			'@pages': resolve(__dirname, 'pages'),
+		},
+	},
+	define: {
+		'import.meta.env.LLM_MODEL_NAME': JSON.stringify(process.env.LLM_MODEL_NAME),
+		'import.meta.env.LLM_API_KEY': JSON.stringify(process.env.LLM_API_KEY),
+		'import.meta.env.LLM_BASE_URL': JSON.stringify(process.env.LLM_BASE_URL),
+	},
+}
+
+export default defineConfig(config)