fix(frontend): build + remove hover tooltips in step links

- Fix Turbopack build: replace raw-loader .md import with inlined about-content.ts; drop raw-loader from next.config and package.json
- Remove all hover tooltips on step-area links (web_fetch, read_file, ls, bash, write_file, web_search) so hidden steps no longer show popups

修复：构建错误与步骤链接悬停提示
- 修复 Turbopack 构建：用内联 about-content.ts 替代 raw-loader 导入 about.md，并移除 next.config 与 package.json 中的 raw-loader
- 移除步骤区域内所有链接的悬停提示（查看网页、读文件、列目录、bash、写文件、网页搜索），隐藏步骤悬停不再弹出内容

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/workspace/settings/about-content.ts

@@ -0,0 +1,57 @@
+/**
+ * About DeerFlow markdown content. Inlined to avoid raw-loader dependency
+ * (Turbopack cannot resolve raw-loader for .md imports).
+ */
+export const aboutMarkdown = `# 🦌 [About DeerFlow 2.0](https://github.com/bytedance/deer-flow)
+
+> **From Open Source, Back to Open Source**
+
+**DeerFlow** (**D**eep **E**xploration and **E**fficient **R**esearch **Flow**) is a community-driven SuperAgent harness that researches, codes, and creates.
+With the help of sandboxes, memories, tools and skills, it handles
+different levels of tasks that could take minutes to hours.
+
+---
+
+## 🌟 GitHub Repository
+
+Explore DeerFlow on GitHub: [github.com/bytedance/deer-flow](https://github.com/bytedance/deer-flow)
+
+## 🌐 Official Website
+
+Visit the official website of DeerFlow: [deerflow.tech](https://deerflow.tech/)
+
+## 📧 Support
+
+If you have any questions or need help, please contact us at [support@deerflow.tech](mailto:support@deerflow.tech).
+
+---
+
+## 📜 License
+
+DeerFlow is proudly open source and distributed under the **MIT License**.
+
+---
+
+## 🙌 Acknowledgments
+
+We extend our heartfelt gratitude to the open source projects and contributors who have made DeerFlow a reality. We truly stand on the shoulders of giants.
+
+### Core Frameworks
+- **[LangChain](https://github.com/langchain-ai/langchain)**: A phenomenal framework that powers our LLM interactions and chains.
+- **[LangGraph](https://github.com/langchain-ai/langgraph)**: Enabling sophisticated multi-agent orchestration.
+- **[Next.js](https://nextjs.org/)**: A cutting-edge framework for building web applications.
+
+### UI Libraries
+- **[Shadcn](https://ui.shadcn.com/)**: Minimalistic components that power our UI.
+- **[SToneX](https://github.com/stonexer)**: For his invaluable contribution to token-by-token visual effects.
+
+These outstanding projects form the backbone of DeerFlow and exemplify the transformative power of open source collaboration.
+
+### Special Thanks
+Finally, we want to express our heartfelt gratitude to the core authors of DeerFlow 1.0 and 2.0:
+
+- **[Daniel Walnut](https://github.com/hetaoBackend/)**
+- **[Henry Li](https://github.com/magiccube/)**
+
+Without their vision, passion and dedication, \`DeerFlow\` would not be what it is today.
+`;