增加 demo 环境变量

src/pages/login/index.tsx

@@ -18,6 +18,7 @@ import { SharedContext } from '@/layouts';
 
 const FormItem = Form.Item;
 const { Countdown } = Statistic;
+const isDemoEnv = window.__ENV__DeployEnv === 'demo';
 
 const Login = () => {
   const { reloadUser } = useOutletContext<SharedContext>();
@@ -169,10 +170,16 @@ const Login = () => {
         ) : (
           <Form layout="vertical" onFinish={handleOk}>
             <FormItem name="username" label="用户名" hasFeedback>
-              <Input placeholder="用户名" autoFocus />
+              <Input
+                placeholder={`用户名${isDemoEnv ? ': admin' : ''}`}
+                autoFocus
+              />
             </FormItem>
             <FormItem name="password" label="密码" hasFeedback>
-              <Input type="password" placeholder="密码" />
+              <Input
+                type="password"
+                placeholder={`密码${isDemoEnv ? ': 123' : ''}`}
+              />
             </FormItem>
             <Row>
               {waitTime ? (