Restructure assets to top-level package and add Reset Map button

- Move assets from internal/assets to top-level assets/ package for clean embed directive
- Consolidate all static files in single location (assets/static/)
- Remove duplicate static file locations to maintain single source of truth
- Add Reset Map button to map controls with full functionality
- Implement resetMap() method to return map to calculated origin position
- Store origin in this.mapOrigin for reset functionality
- Fix go:embed pattern to work without parent directory references

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

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

internal/client/dump1090.go

@@ -52,7 +52,7 @@ func (c *Dump1090Client) startDataStream(ctx context.Context) {
 
 func (c *Dump1090Client) connectAndRead(ctx context.Context) error {
 	address := fmt.Sprintf("%s:%d", c.config.Dump1090.Host, c.config.Dump1090.DataPort)
-	
+
 	conn, err := net.Dial("tcp", address)
 	if err != nil {
 		return fmt.Errorf("failed to connect to %s: %w", address, err)
@@ -109,7 +109,7 @@ func (c *Dump1090Client) updateExistingAircraft(existing, update *parser.Aircraf
 	if update.Latitude != 0 && update.Longitude != 0 {
 		existing.Latitude = update.Latitude
 		existing.Longitude = update.Longitude
-		
+
 		// Add to track history if position changed significantly
 		if c.shouldAddTrackPoint(existing, update) {
 			trackPoint := parser.TrackPoint{
@@ -120,9 +120,9 @@ func (c *Dump1090Client) updateExistingAircraft(existing, update *parser.Aircraf
 				Speed:     update.GroundSpeed,
 				Track:     update.Track,
 			}
-			
+
 			existing.TrackHistory = append(existing.TrackHistory, trackPoint)
-			
+
 			// Keep only last 200 points (about 3-4 hours at 1 point/minute)
 			if len(existing.TrackHistory) > 200 {
 				existing.TrackHistory = existing.TrackHistory[1:]
@@ -136,7 +136,7 @@ func (c *Dump1090Client) updateExistingAircraft(existing, update *parser.Aircraf
 		existing.Squawk = update.Squawk
 	}
 	existing.OnGround = update.OnGround
-	
+
 	// Preserve country and registration
 	if update.Country != "" && update.Country != "Unknown" {
 		existing.Country = update.Country
@@ -152,19 +152,19 @@ func (c *Dump1090Client) shouldAddTrackPoint(existing, update *parser.Aircraft)
 	if len(existing.TrackHistory) == 0 {
 		return true
 	}
-	
+
 	lastPoint := existing.TrackHistory[len(existing.TrackHistory)-1]
-	
+
 	// 2. At least 30 seconds since last point
 	if time.Since(lastPoint.Timestamp) < 30*time.Second {
 		return false
 	}
-	
+
 	// 3. Position changed by at least 0.001 degrees (~100m)
 	latDiff := existing.Latitude - lastPoint.Latitude
 	lonDiff := existing.Longitude - lastPoint.Longitude
 	distanceChange := latDiff*latDiff + lonDiff*lonDiff
-	
+
 	return distanceChange > 0.000001 // ~0.001 degrees squared
 }
 
@@ -249,7 +249,7 @@ func (c *Dump1090Client) cleanupStaleAircraft() {
 
 	cutoff := time.Now().Add(-2 * time.Minute)
 	trackCutoff := time.Now().Add(-24 * time.Hour)
-	
+
 	for hex, aircraft := range c.aircraftMap {
 		if aircraft.LastSeen.Before(cutoff) {
 			delete(c.aircraftMap, hex)
@@ -264,4 +264,4 @@ func (c *Dump1090Client) cleanupStaleAircraft() {
 			aircraft.TrackHistory = validTracks
 		}
 	}
-}
+}