docs: add MIT License

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 wuwenfengmi1998
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -19,6 +19,7 @@
 - [目录说明](#目录说明)
 - [常见问题排查](#常见问题排查)
 - [相关文档](#相关文档)
+- [许可证](#许可证)
 
 ---
 
@@ -378,3 +379,11 @@ sudo bash install_linux.sh
 - `/api/login` 与 WebSocket 密码认证均限制每 IP 5 次/分钟
 - WebSocket `/ws` 支持 JWT（`?token=xxx`）与用户名/密码两种认证
 - 生产环境务必经反向代理启用 HTTPS/WSS
+
+---
+
+## 许可证
+
+本项目基于 [MIT License](LICENSE) 开源。
+
+Copyright (c) 2026 wuwenfengmi1998