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/css/style.css

@@ -857,4 +857,60 @@ body {
 
 .squawk-standard:hover {
     background: #218838;
+}
+
+/* 3D Radar Styles */
+#radar3d-view {
+    position: relative;
+}
+
+#radar3d-container {
+    flex: 1;
+    min-height: 500px;
+    width: 100%;
+    background: #0a0a0a;
+    position: relative;
+}
+
+.radar3d-controls {
+    display: flex;
+    gap: 1rem;
+    padding: 1rem;
+    background: #2d2d2d;
+    border-bottom: 1px solid #404040;
+    align-items: center;
+}
+
+.radar3d-controls button {
+    padding: 0.5rem 1rem;
+    background: #404040;
+    color: white;
+    border: 1px solid #666;
+    border-radius: 4px;
+    cursor: pointer;
+}
+
+.radar3d-controls button:hover:not(:disabled) {
+    background: #505050;
+}
+
+.radar3d-controls button:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+}
+
+.radar3d-controls button.active {
+    background: #00a8ff;
+    border-color: #0088cc;
+}
+
+.radar3d-controls label {
+    display: flex;
+    gap: 0.5rem;
+    align-items: center;
+    color: #ccc;
+}
+
+.radar3d-controls input[type="range"] {
+    width: 150px;
 }