Suspected location exclusion zone, drawn under real nodes, and update progress bar

lib/state/settings_state.dart

@@ -27,6 +27,7 @@ class SettingsState extends ChangeNotifier {
   static const String _proximityAlertsEnabledPrefsKey = 'proximity_alerts_enabled';
   static const String _proximityAlertDistancePrefsKey = 'proximity_alert_distance';
   static const String _networkStatusIndicatorEnabledPrefsKey = 'network_status_indicator_enabled';
+  static const String _suspectedLocationMinDistancePrefsKey = 'suspected_location_min_distance';
 
   bool _offlineMode = false;
   int _maxCameras = 250;
@@ -35,6 +36,7 @@ class SettingsState extends ChangeNotifier {
   bool _proximityAlertsEnabled = false;
   int _proximityAlertDistance = kProximityAlertDefaultDistance;
   bool _networkStatusIndicatorEnabled = false;
+  int _suspectedLocationMinDistance = 100; // meters
   List<TileProvider> _tileProviders = [];
   String _selectedTileTypeId = '';
 
@@ -46,6 +48,7 @@ class SettingsState extends ChangeNotifier {
   bool get proximityAlertsEnabled => _proximityAlertsEnabled;
   int get proximityAlertDistance => _proximityAlertDistance;
   bool get networkStatusIndicatorEnabled => _networkStatusIndicatorEnabled;
+  int get suspectedLocationMinDistance => _suspectedLocationMinDistance;
   List<TileProvider> get tileProviders => List.unmodifiable(_tileProviders);
   String get selectedTileTypeId => _selectedTileTypeId;
   
@@ -101,6 +104,9 @@ class SettingsState extends ChangeNotifier {
     // Load network status indicator setting
     _networkStatusIndicatorEnabled = prefs.getBool(_networkStatusIndicatorEnabledPrefsKey) ?? false;
     
+    // Load suspected location minimum distance
+    _suspectedLocationMinDistance = prefs.getInt(_suspectedLocationMinDistancePrefsKey) ?? 100;
+    
     // Load upload mode (including migration from old test_mode bool)
     if (prefs.containsKey(_uploadModePrefsKey)) {
       final idx = prefs.getInt(_uploadModePrefsKey) ?? 0;
@@ -323,4 +329,14 @@ class SettingsState extends ChangeNotifier {
     }
   }
 
+  /// Set suspected location minimum distance from real nodes
+  Future<void> setSuspectedLocationMinDistance(int distance) async {
+    if (_suspectedLocationMinDistance != distance) {
+      _suspectedLocationMinDistance = distance;
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setInt(_suspectedLocationMinDistancePrefsKey, distance);
+      notifyListeners();
+    }
+  }
+
 }

lib/state/suspected_location_state.dart

@@ -49,12 +49,14 @@ class SuspectedLocationState extends ChangeNotifier {
   }
 
   /// Manually refresh the data
-  Future<bool> refreshData() async {
+  Future<bool> refreshData({
+    void Function(String message, double? progress)? onProgress,
+  }) async {
     _isLoading = true;
     notifyListeners();
     
     try {
-      final success = await _service.refreshData();
+      final success = await _service.refreshData(onProgress: onProgress);
       return success;
     } finally {
       _isLoading = false;