添加服务端运行警告

astro.config.mjs

@@ -1,5 +1,5 @@
 // @ts-check
-import { defineConfig } from 'astro/config'
+import { defineConfig, envField } from 'astro/config'
 
 import node from '@astrojs/node'
 import svelte from '@astrojs/svelte'
@@ -29,4 +29,15 @@ export default defineConfig({
       },
     },
   },
+
+  // 环境变量管理
+  env: {
+    schema: {
+      LEGACY_BACKEND_URL_SSR: envField.string({
+        context: 'server',
+        access: 'secret',
+        default: 'https://legacy.passthem.top/api',
+      }),
+    },
+  },
 })