Refactor dev-0 panel header with deploy and delete buttons
- Created Dev0Header component with integrated deploy and delete buttons
- Moved deploy functionality from Dev0Panel to Dev0Header
- Added delete project functionality with confirmation dialog
- Simplified Dev0Panel to only render iframe
- Styled buttons to match Next.js devtools design system
- Shows deployment URL in header when deployed
- Refreshes project list after deletion
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
