let AI comment everything because well... yeah...

lib/screens/excursion/widgets/tracking.dart

@@ -1,3 +1,12 @@
+// * Widget for GPS tracking during wildlife monitoring excursions
+// * Features:
+// * - Real-time location tracking
+// * - Track visualization on map
+// * - Distance calculation
+// * - Location accuracy monitoring
+// * - Track recording controls (start/pause/stop)
+// * - Track data persistence
+
 import 'dart:async';
 
 import 'package:fforte/l10n/app_localizations.dart';
@@ -11,27 +20,40 @@ import 'package:flutter_map_location_marker/flutter_map_location_marker.dart';
 import 'package:geolocator/geolocator.dart';
 import 'package:latlong2/latlong.dart';
 
+/// Widget for managing GPS tracking functionality
+/// Provides map visualization and tracking controls
 class Tracking extends StatefulWidget {
+  /// Initial position for the tracking session
   final Position startPosition;
+  /// Controller for storing the tracked path
   final TextEditingController weg;
+
   const Tracking({super.key, required this.startPosition, required this.weg});
 
   @override
   State<Tracking> createState() => _TrackingState();
 }
 
+/// State class for the tracking widget
 class _TrackingState extends State<Tracking> {
+  /// Service for managing tracking functionality
   final TrackingService _trackingService = TrackingService();
+  /// Current GPS position
   Position? currentPosition;
+  /// Controller for the map widget
   MapController mapController = MapController();
+  /// Subscription for position updates
   StreamSubscription? _positionSubscription;
+  /// Subscription for tracking statistics updates
   StreamSubscription? _statsSubscription;
+  /// Current tracking statistics
   TrackingStats? _currentStats;
 
   @override
   void initState() {
     super.initState();
 
+    // Load existing track if available
     if (widget.weg.text.isNotEmpty) {
       for (var element in widget.weg.text.split(";")) {
         List<String> posSplit = element.split(",");
@@ -50,24 +72,27 @@ class _TrackingState extends State<Tracking> {
 
     currentPosition = widget.startPosition;
 
-    // Initialisiere die Statistiken sofort
+    // Initialize tracking statistics
     setState(() {
       _currentStats = _trackingService.currentStats;
     });
     _trackingService.requestStatsUpdate();
 
+    // Subscribe to position updates
     _positionSubscription = _trackingService.positionStream$.listen((position) {
       setState(() {
         currentPosition = position;
       });
     });
 
+    // Subscribe to statistics updates
     _statsSubscription = _trackingService.statsStream$.listen((stats) {
       setState(() {
         _currentStats = stats;
       });
     });
 
+    // Check location permissions
     GeolocatorService.alwaysPositionEnabled().then((value) {
       if (!value && mounted) {
         Navigator.of(context).pop();
@@ -84,6 +109,9 @@ class _TrackingState extends State<Tracking> {
     super.dispose();
   }
 
+  /// Format distance for display
+  /// @param meters Distance in meters
+  /// @return Formatted distance string with appropriate unit
   String _formatDistance(double meters) {
     if (meters >= 1000) {
       return '${(meters / 1000).toStringAsFixed(2)} km';
@@ -99,6 +127,7 @@ class _TrackingState extends State<Tracking> {
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             Text(AppLocalizations.of(context)!.tracking),
+            // Display tracking statistics if available
             if (_currentStats != null)
               DefaultTextStyle(
                 style: Theme.of(context).textTheme.bodySmall!,
@@ -125,6 +154,7 @@ class _TrackingState extends State<Tracking> {
           icon: Icon(Icons.arrow_back_rounded)
         ),
         actions: [
+          // Delete track button (only when not tracking)
           if (!_trackingService.isTracking)
             IconButton(
               onPressed: () async {
@@ -140,6 +170,7 @@ class _TrackingState extends State<Tracking> {
                 color: Theme.of(context).colorScheme.errorContainer,
               ),
             ),
+          // Stop tracking button (only when tracking)
           if (_trackingService.isTracking)
             TextButton(
               onPressed: () {
@@ -149,6 +180,7 @@ class _TrackingState extends State<Tracking> {
               },
               child: Text(AppLocalizations.of(context)!.trackingStop),
             ),
+          // Start/Pause tracking button
           TextButton(
             onPressed: () {
               setState(() {
@@ -165,6 +197,7 @@ class _TrackingState extends State<Tracking> {
           ),
         ],
       ),
+      // Center on current location button
       floatingActionButton: FloatingActionButton(
         onPressed: () {
           mapController.move(
@@ -177,6 +210,7 @@ class _TrackingState extends State<Tracking> {
         },
         child: Icon(Icons.my_location),
       ),
+      // Map display
       body: FlutterMap(
         mapController: mapController,
         options: MapOptions(
@@ -192,10 +226,12 @@ class _TrackingState extends State<Tracking> {
           initialZoom: 16.0,
         ),
         children: [
+          // Base map layer
           TileLayer(
             urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
             userAgentPackageName: 'de.lupus.apps',
           ),
+          // Track path layer
           if (_trackingService.pathList.isNotEmpty)
             PolylineLayer(
               polylines: [
@@ -206,6 +242,7 @@ class _TrackingState extends State<Tracking> {
                 ),
               ],
             ),
+          // Current position accuracy circle
           if (currentPosition != null)
             CircleLayer(
               circles: [
@@ -231,6 +268,7 @@ class _TrackingState extends State<Tracking> {
                 ),
               ],
             ),
+          // Current location marker
           CurrentLocationLayer(),
         ],
       ),