feat: 优化会展策划网站UI和添加Duoduo Agent设计流程展示

主要更新:
- 统一所有页面导航栏样式为glass-morphism风格
- 添加Duoduo Agent智能设计系统完整可视化流程
- 展示从CAD到展位概念的5个设计阶段
- 优化页面交互效果和用户体验

详细修改:
- web_frontend/web_result/pages/: 统一6个页面导航栏样式
- operation.html: 新增Duoduo Agent设计流程展示模块
- 添加5张设计阶段图片展示 (CAD/概念/白模/渲染/最终方案)
- 增强视觉效果和动画交互

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

web_frontend/exhibition-demo/node_modules/fsevents/LICENSE

@@ -0,0 +1,22 @@
+MIT License
+-----------
+
+Copyright (C) 2010-2020 by Philipp Dunkel, Ben Noordhuis, Elan Shankar, Paul Miller
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
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