doc: update user config

README.md

@@ -83,7 +83,9 @@ npm install
 npm run dev
 ```
 
-打开浏览器并访问 `http://localhost:5173`。搞定！🎉 你现在可以开始和你的数据愉快的聊天了。
+
+### 3. 初始账号配置 👤
+系统首次注册的用户将自动成为管理员。您可以在登录页面直接点击“注册”按钮创建您的管理员账号（例如：用户名 `admin`，密码 `admin`），随后即可登录并管理项目、数据源和用户。
 
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README_en.md

@@ -83,7 +83,8 @@ npm install
 npm run dev
 ```
 
-Open your browser and navigate to `http://localhost:5173`. Boom! 🎉 You're ready to chat with your data.
+### 3. Initial Account Setup 👤
+The first user to register in the system will automatically be granted admin privileges. You can simply click the "Register" button on the login page to create your admin account (e.g., Username: `admin`, Password: `admin`), and then log in to manage projects, data sources, and users.
 
 ***