chore: add MIT license

- Add MIT License file
- Add license field to package.json
- Update README files with license information
- Rename license directory to certificates
- Update .gitignore to exclude certificates directory

Author: lsustc

.gitignore

@@ -14,7 +14,7 @@
 /.claude
 .npmrc
 CLAUDE.md
-/license
+/certificates
 .env.local
 .env.production
 package-mac-signed.sh

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024-2025 DeepFundAI
+
+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

@@ -197,4 +197,8 @@ Special thanks to [Eko](https://github.com/FellouAI/eko) - A production-ready ag
 
 ## Contributing
 
-Please ensure all API keys are properly configured in development environment files only. Never commit actual API keys to the repository.
+Please ensure all API keys are properly configured in development environment files only. Never commit actual API keys to the repository.
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.

README.zh-CN.md

@@ -192,3 +192,7 @@ pnpm run build
 ## 贡献
 
 请确保所有 API 密钥仅在开发环境文件中配置。永远不要将实际的 API 密钥提交到仓库中。
+
+## 开源协议
+
+本项目采用 MIT 协议开源 - 详见 [LICENSE](LICENSE) 文件。

package.json

@@ -3,7 +3,7 @@
   "version": "0.0.11",
   "description": "DeepFundAI Browser - AI-Powered Intelligent Browser",
   "author": "Shuai Liu <lsustc@mail.ustc.edu.cn>",
-  "private": true,
+  "license": "MIT",
   "scripts": {
     "postinstall": "electron-builder install-app-deps",
     "dev": "concurrently \"next dev -p 5173\" \"npm run build:deps:watch\" \"nodemon --exec electron ./dist/electron/main/index.mjs --watch electron\"",