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.

doc/3-API.md

@@ -55,6 +55,8 @@ http://localhost:1999
 |----------|--------|-------------|------------|
 | `/?lang={en\|es}` | GET | Full HTML page with CV content | Initial page load |
 | `/cv?lang={en\|es}` | GET | HTML partial for HTMX swaps | Language switching |
+| `/text?lang={en\|es}` | GET | Plain text CV for terminal/AI | curl, text browsers |
+| `/api/cmd-k?lang={en\|es}` | GET | CMD+K command palette data (JSON) | ninja-keys integration |
 | `/export/pdf?lang={en\|es}&length={short\|long}&icons={show\|hide}&version={extended\|clean}` | GET | Download PDF resume with parameters | Export functionality |
 | `/health` | GET | Health check (JSON) | Monitoring |
 | `/static/{path}` | GET | Static files (CSS, JS, images) | Assets |
@@ -77,6 +79,12 @@ curl "http://localhost:1999/cv?lang=en"
 # Export PDF (short, clean version)
 curl -O -J "http://localhost:1999/export/pdf?lang=en&length=short&version=clean"
 
+# CMD+K command palette data (JSON)
+curl -s http://localhost:1999/api/cmd-k | jq '.experiences | length'
+
+# Plain text CV
+curl http://localhost:1999/text?lang=en
+
 # Static file with headers
 curl -I http://localhost:1999/static/css/main.css
 ```