fix: Clean up excessive debug logging in JavaScript console

- Add conditional verbose logging controlled by ?verbose URL param or localStorage
- Reduce frequent WebSocket message logging to verbose mode only
- Minimize aircraft position update logging to prevent console spam
- Make 3D radar initialization logging conditional on verbose flag
- Reduce WebSocket message counter frequency from every 10 to every 500 messages
- Preserve important error messages and connection status logging

Users can enable verbose logging with:
- URL parameter: http://localhost:8080?verbose
- localStorage: localStorage.setItem('skyview-verbose', 'true')

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

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

assets/static/js/modules/websocket.js

@@ -53,8 +53,8 @@ export class WebSocketManager {
                     this.lastMessageTime = Date.now();
                     this.messageCount++;
                     
-                    // Log message reception for debugging
-                    if (this.messageCount % 10 === 0) {
+                    // Only log message counts in verbose mode and less frequently
+                    if (window.skyviewVerbose && this.messageCount % 500 === 0) {
                         console.debug(`Received ${this.messageCount} WebSocket messages`);
                     }