feat: 导航收藏网站 v1.0

功能:
- 网站收藏管理（添加/编辑/删除/收藏）
- 分类管理（支持自定义图标和颜色）
- 搜索功能
- 点击统计
- 现代暗色主题 UI

技术栈:
- 后端: Python Flask + MySQL
- 前端: React + Vite + Tailwind CSS
- 数据库: MySQL (192.168.8.160)
- 端口: 后端 5003, 前端 5173

frontend/node_modules/nanoid/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright 2017 Andrey Sitnik <andrey@sitnik.ru>
+
+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.