Add separate color and legend entry for High Vortex Large aircraft

- Added High Vortex Large as distinct category in legend
- Assigned red-orange color (#ff4500) to differentiate from regular Large
- Updated JavaScript to check for high vortex before regular large
- Maintains proper ADS-B category distinctions for wake turbulence

High Vortex Large aircraft (like B757) create stronger wake turbulence
than typical large aircraft, warranting visual distinction for safety.

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

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

assets/static/js/modules/aircraft-manager.js

@@ -297,8 +297,12 @@ export class AircraftManager {
             if (cat.includes('medium')) {
                 return '#00ff88';
             }
+            // High Vortex Large - Red-orange (special wake turbulence category)
+            if (cat.includes('high vortex')) {
+                return '#ff4500';
+            }
             // Large aircraft (34000-136000kg) - Orange
-            if (cat.includes('large') || cat.includes('high vortex')) {
+            if (cat.includes('large')) {
                 return '#ff8c00';
             }
             // Heavy aircraft (> 136000kg) - Red