feat: Implement 3D Radar View Controls - resolves #9

- Add Reset View button functionality to reset camera to default position
- Implement Auto Rotate toggle with visual feedback and button text updates
- Add Range slider (10-500km) with real-time aircraft distance filtering
- Use server-provided origin coordinates via /api/origin API endpoint
- Implement Haversine formula for accurate geographic distance calculations
- Add deferred initialization to prevent black screen issue
- Enhanced lighting and ground plane visibility for better 3D orientation
- Add comprehensive debugging and error handling for WebGL/Three.js
- Style 3D radar controls with proper CSS for consistent UI
- Remove construction notice as controls are now fully functional

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

assets/static/index.html

@@ -411,7 +411,6 @@
             <!-- 3D Radar View -->
             <div id="radar3d-view" class="view">
                 <div class="radar3d-controls">
-                    <div class="construction-notice">🚧 3D Controls Under Construction</div>
                     <button id="radar3d-reset" disabled>Reset View</button>
                     <button id="radar3d-auto-rotate" disabled>Auto Rotate</button>
                     <label>