Clean up and optimize codebase for production readiness

Performance & Reliability Improvements:
- Increase WebSocket buffer sizes from 1KB to 8KB for better throughput
- Increase broadcast channel buffer from 100 to 1000 messages
- Increase Beast message channel buffer from 1000 to 5000 messages
- Increase connection timeout from 10s to 30s for remote receivers

Code Quality Improvements:
- Remove debug output from production code (CPR Debug, Merger Update spam)
- Add MaxDistance constant to replace magic number (999999)
- Clean up comments for better maintainability
- Implement auto-enable for selected aircraft trails

Benefits:
- Much cleaner server logs without debug spam
- Better performance under high aircraft density
- More reliable WebSocket connections with larger buffers
- Improved fault tolerance with increased timeouts

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

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

assets/static/js/app.js

@@ -191,10 +191,17 @@ class SkyView {
             // Update selected aircraft
             this.selectedAircraft = icao;
             
-            // Show trail for newly selected aircraft if enabled
-            if (this.selectedTrailEnabled) {
-                this.aircraftManager.showAircraftTrail(icao);
+            // Automatically enable selected aircraft trail when an aircraft is selected
+            if (!this.selectedTrailEnabled) {
+                this.selectedTrailEnabled = true;
+                const selectedTrailCheckbox = document.getElementById('show-selected-trail');
+                if (selectedTrailCheckbox) {
+                    selectedTrailCheckbox.checked = true;
                 }
+            }
+            
+            // Show trail for newly selected aircraft
+            this.aircraftManager.showAircraftTrail(icao);
             
             // DON'T change map view - just open popup like Leaflet expects
             if (this.mapManager.map && aircraft.Latitude && aircraft.Longitude) {

internal/client/beast.go

@@ -73,7 +73,7 @@ func NewBeastClient(source *merger.Source, merger *merger.Merger) *BeastClient {
 		source:         source,
 		merger:         merger,
 		decoder:        modes.NewDecoder(source.Latitude, source.Longitude),
-		msgChan:        make(chan *beast.Message, 1000),
+		msgChan:        make(chan *beast.Message, 5000),
 		errChan:        make(chan error, 10),
 		stopChan:       make(chan struct{}),
 		reconnectDelay: 5 * time.Second,
@@ -146,7 +146,7 @@ func (c *BeastClient) run(ctx context.Context) {
 		addr := fmt.Sprintf("%s:%d", c.source.Host, c.source.Port)
 		fmt.Printf("Connecting to Beast stream at %s (%s)...\n", addr, c.source.Name)
 
-		conn, err := net.DialTimeout("tcp", addr, 10*time.Second)
+		conn, err := net.DialTimeout("tcp", addr, 30*time.Second)
 		if err != nil {
 			fmt.Printf("Failed to connect to %s: %v\n", c.source.Name, err)
 			c.source.Active = false

internal/merger/merger.go

@@ -30,6 +30,11 @@ import (
 	"skyview/internal/modes"
 )
 
+const (
+	// MaxDistance represents an infinite distance for initialization
+	MaxDistance = float64(999999)
+)
+
 // Source represents a data source (dump1090 receiver or similar ADS-B source).
 // It contains both static configuration and dynamic status information used
 // for data fusion decisions and source monitoring.
@@ -431,14 +436,9 @@ func (m *Merger) mergeAircraftData(state *AircraftState, new *modes.Aircraft, so
 		}
 
 		if updatePosition {
-			fmt.Printf("Merger Update %06X: %.6f,%.6f -> %.6f,%.6f\n", 
-				state.Aircraft.ICAO24, state.Latitude, state.Longitude, new.Latitude, new.Longitude)
 			state.Latitude = new.Latitude
 			state.Longitude = new.Longitude
 			state.PositionSource = sourceID
-		} else {
-			fmt.Printf("Merger Skip %06X: rejected update %.6f,%.6f (current: %.6f,%.6f)\n", 
-				state.Aircraft.ICAO24, new.Latitude, new.Longitude, state.Latitude, state.Longitude)
 		}
 	}
 
@@ -672,7 +672,7 @@ func (m *Merger) GetAircraft() map[uint32]*AircraftState {
 		stateCopy.Age = now.Sub(state.LastUpdate).Seconds()
 
 		// Find closest receiver distance
-		minDistance := float64(999999)
+		minDistance := MaxDistance
 		for _, srcData := range state.Sources {
 			if srcData.Distance > 0 && srcData.Distance < minDistance {
 				minDistance = srcData.Distance

internal/modes/decoder.go

@@ -434,9 +434,7 @@ func (d *Decoder) decodeCPRPosition(aircraft *Aircraft) {
 	oddLon := d.cprOddLon[aircraft.ICAO24]
 	d.mu.RUnlock()
 
-	// Debug: Log CPR input values
-	fmt.Printf("CPR Debug %s: even=[%.6f,%.6f] odd=[%.6f,%.6f]\n", 
-		aircraft.ICAO24, evenLat, evenLon, oddLat, oddLon)
+	// CPR input values ready for decoding
 
 	// CPR decoding algorithm
 	dLat := 360.0 / 60.0
@@ -479,12 +477,8 @@ func (d *Decoder) decodeCPRPosition(aircraft *Aircraft) {
 	// Choose the latitude solution that's closer to the receiver position
 	if distToOdd < distToEven {
 		aircraft.Latitude = latOdd
-		fmt.Printf("CPR Zone: chose ODD lat=%.6f (dist=%.3f) over EVEN lat=%.6f (dist=%.3f) [ref=%.6f]\n", 
-			latOdd, distToOdd, latEven, distToEven, d.refLatitude)
 	} else {
 		aircraft.Latitude = latEven
-		fmt.Printf("CPR Zone: chose EVEN lat=%.6f (dist=%.3f) over ODD lat=%.6f (dist=%.3f) [ref=%.6f]\n", 
-			latEven, distToEven, latOdd, distToOdd, d.refLatitude)
 	}
 
 	// Longitude calculation
@@ -508,8 +502,7 @@ func (d *Decoder) decodeCPRPosition(aircraft *Aircraft) {
 
 	aircraft.Longitude = lon
 	
-	// Debug: Log final decoded coordinates
-	fmt.Printf("CPR Result %s: lat=%.6f lon=%.6f\n", aircraft.ICAO24, aircraft.Latitude, aircraft.Longitude)
+	// CPR decoding completed successfully
 }
 
 // nlFunction calculates the number of longitude zones (NL) for a given latitude.

internal/server/server.go

@@ -110,10 +110,10 @@ func NewServer(port int, merger *merger.Merger, staticFiles embed.FS, origin Ori
 			CheckOrigin: func(r *http.Request) bool {
 				return true // Allow all origins in development
 			},
-			ReadBufferSize:  1024,
-			WriteBufferSize: 1024,
+			ReadBufferSize:  8192,
+			WriteBufferSize: 8192,
 		},
-		broadcastChan: make(chan []byte, 100),
+		broadcastChan: make(chan []byte, 1000),
 		stopChan:      make(chan struct{}),
 	}
 }