优化证书生成与正式部署配置

frontend/vite.config.ts

@@ -1,13 +1,15 @@
 import { defineConfig } from "vite";
 import vue from "@vitejs/plugin-vue";
 
+const apiProxyTarget = process.env.VITE_API_PROXY_TARGET || "http://localhost:8000";
+
 export default defineConfig({
   plugins: [vue()],
   server: {
     port: 5173,
     proxy: {
       "/api": {
-        target: "http://localhost:8000",
+        target: apiProxyTarget,
         changeOrigin: true,
         rewrite: (path) => path.replace(/^\/api/, "")
       }