enable dev|prod envs with simpler env vars system

frontend/vite.config.ts

@@ -2,7 +2,6 @@ import tailwindcss from '@tailwindcss/vite';
 import { defineConfig } from 'vite';
 import adapter from '@sveltejs/adapter-node';
 import { sveltekit } from '@sveltejs/kit/vite';
-import { SERVER_IP, FRONTEND_PORT, PROXY_PORT } from '../config.ts';
 
 export default defineConfig(() => {
 	return {
@@ -25,11 +24,13 @@ export default defineConfig(() => {
 			fs: {
 				allow: ['.', './node_modules', '../node_modules']
 			},
-			allowedHosts: [SERVER_IP],
-			port: FRONTEND_PORT,
+			// Dev only: allow access via any host/LAN IP without hardcoding it.
+			allowedHosts: true,
+			port: 2080,
 			proxy: {
 				'/api': {
-					target: `http://${SERVER_IP}:${PROXY_PORT}`,
+					// The vite dev server and Hono proxy run on the same host.
+					target: `http://127.0.0.1:3456`,
 					changeOrigin: true
 				}
 			}