Implemented comprehensive VR onboarding experience for Quest users:
- Add demo database template with pre-built architecture diagram
- Implement automatic demo template loading on first visit
- Create VREntryPrompt component for seamless VR mode entry
- Add device detection utilities for Quest/VR headset identification
- Integrate export/import functionality for diagram templates
- Add About page with device-aware CTA and VR benefits
- Remove legacy tutorial and FirstVisitVr modal for demo flow
- Add upgrade prompts and tiered feature configuration
Quest users now see prominent VR entry prompt when navigating to /db/** paths,
providing one-tap entry into immersive mode after scene initialization.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
