feat: Add CMD+K command palette with ninja-keys integration

Implement a command palette accessible via CMD+K/Ctrl+K using the ninja-keys
web component. Features include:

- New /api/cmd-k endpoint serving dynamic CV entries (experiences, projects, courses)
- Language-aware responses with 1-hour cache headers
- Scroll-to-section functionality for quick navigation
- Enhanced keyboard shortcuts modal with CMD+K documentation
- Comprehensive test coverage for API and UI interactions

Also includes cleanup of deprecated debug test files and various UI polish
improvements to contact form, themes, and action bar components.

README.md

@@ -14,7 +14,7 @@ A professional, bilingual CV site with server-side PDF generation, HTMX interact
 
 **Open Source:** The code is MIT licensed and available for educational purposes. You're welcome to use it as a template or reference for your own projects. This repository is maintained as my personal CV site and may be modified without notice.
 
-**Contributions:** This is a personal CV project and is feature-complete. I'm not seeking contributions, but you're welcome to use it as a template! If you find a critical security vulnerability, please follow the [responsible disclosure process](docs/HACK-CHALLENGE.md#-responsible-disclosure).
+**Contributions:** This is a personal CV project and is feature-complete. I'm not seeking contributions, but you're welcome to use it as a template! If you find a critical security vulnerability, please report it via email.
 
 ## 📑 Table of Contents
 
@@ -81,24 +81,7 @@ This project demonstrates **production-grade security** practices with multiple
 
 **Security Rating: A- (Very Good)**
 
-### Try to Hack Me Challenge! 🎯
-
-Think you can break through these defenses? **I welcome ethical hackers and security researchers to test this site.**
-
-**Challenge Categories:**
-1. **Browser-Only Bypass** - Submit a contact form using curl or Postman (Hard ⭐⭐⭐)
-2. **Rate Limit Bypass** - Exceed the rate limits without detection (Medium ⭐⭐)
-3. **Injection Challenge** - Execute code via XSS, command injection, or email header injection (Hard ⭐⭐⭐)
-4. **Bot Detection Bypass** - Submit as a bot without getting caught (Medium ⭐⭐)
-5. **CSRF Challenge** - Submit without a valid token (Hard ⭐⭐⭐)
-
-**Documentation:**
-- **[SECURITY.md](docs/SECURITY.md)** - Complete security architecture and implementation details
-- **[HACK-CHALLENGE.md](docs/HACK-CHALLENGE.md)** - Full hacking challenge rules and guidelines
-
-**Found a vulnerability?** Follow the [responsible disclosure process](docs/HACK-CHALLENGE.md#-responsible-disclosure).
-
-**Hall of Fame:** Valid findings will be acknowledged publicly (with your permission).
+**Documentation:** See [SECURITY.md](docs/SECURITY.md) for complete security architecture and implementation details.
 
 ---
 
@@ -197,7 +180,6 @@ This project includes comprehensive documentation organized by purpose:
 
 ### 📋 Policies & Standards
 - **[SECURITY.md](docs/SECURITY.md)** - Complete security architecture, implementation, and testing guide
-- **[HACK-CHALLENGE.md](docs/HACK-CHALLENGE.md)** - "Try to Hack Me!" challenge for security researchers
 - **[PRIVACY.md](doc/PRIVACY.md)** - Privacy policy template and analytics guidance
 - **[CODE_OF_CONDUCT.md](CODE_OF_CONDUCT.md)** - Community standards (Contributor Covenant)
 - **[CONTRIBUTING.md](CONTRIBUTING.md)** - Contribution policy (personal project notice)
@@ -244,7 +226,7 @@ Deployment guides available for:
 - `GO_ENV` - Environment (development/production)
 - `TEMPLATE_HOT_RELOAD` - Enable template hot-reload in development
 
-**Security:** See [SECURITY.md](docs/SECURITY.md) for production deployment best practices and [HACK-CHALLENGE.md](docs/HACK-CHALLENGE.md) for penetration testing guidelines.
+**Security:** See [SECURITY.md](docs/SECURITY.md) for production deployment best practices.
 
 ## 🎨 Customization
 
@@ -306,8 +288,7 @@ This project is licensed under the **MIT License** - see the [LICENSE](LICENSE)
 ## 💬 Questions or Issues?
 
 - **Questions:** Feel free to fork and modify - this is a template!
-- **Security Issues:** See [HACK-CHALLENGE.md](docs/HACK-CHALLENGE.md) for reporting security vulnerabilities
-- **Security Research:** Read the [Try to Hack Me Challenge](docs/HACK-CHALLENGE.md) if you want to test the security
+- **Security Issues:** Report vulnerabilities via email
 - **Documentation:** Check [CUSTOMIZATION.md](doc/CUSTOMIZATION.md) and [DEPLOYMENT.md](doc/DEPLOYMENT.md)
 
 ## 🙏 Acknowledgments