More camera -> node, notifications for approaching

android/app/build.gradle.kts

@@ -17,6 +17,7 @@ android {
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_11
         targetCompatibility = JavaVersion.VERSION_11
+        isCoreLibraryDesugaringEnabled = true
     }
     kotlinOptions {
         jvmTarget = JavaVersion.VERSION_11.toString()
@@ -50,3 +51,7 @@ flutter {
     source = "../.."
 }
 
+dependencies {
+    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.0.4")
+}
+

android/app/src/main/AndroidManifest.xml

@@ -6,6 +6,9 @@
     <!-- Location permissions for blue‑dot positioning -->
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
+    
+    <!-- Notification permission for proximity alerts -->
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
 
     <application
         android:name="${applicationName}"

lib/app_state.dart

@@ -4,7 +4,7 @@ import 'package:latlong2/latlong.dart';
 
 import 'models/node_profile.dart';
 import 'models/operator_profile.dart';
-import 'models/osm_camera_node.dart';
+import 'models/osm_node.dart';
 import 'models/pending_upload.dart';
 import 'models/tile_provider.dart';
 import 'services/offline_area_service.dart';
@@ -79,6 +79,8 @@ class AppState extends ChangeNotifier {
   int get maxCameras => _settingsState.maxCameras;
   UploadMode get uploadMode => _settingsState.uploadMode;
   FollowMeMode get followMeMode => _settingsState.followMeMode;
+  bool get proximityAlertsEnabled => _settingsState.proximityAlertsEnabled;
+  int get proximityAlertDistance => _settingsState.proximityAlertDistance;
   
   // Tile provider state
   List<TileProvider> get tileProviders => _settingsState.tileProviders;
@@ -162,7 +164,7 @@ class AppState extends ChangeNotifier {
     _sessionState.startAddSession(enabledProfiles);
   }
 
-  void startEditSession(OsmCameraNode node) {
+  void startEditSession(OsmNode node) {
     _sessionState.startEditSession(node, enabledProfiles);
   }
 
@@ -218,7 +220,7 @@ class AppState extends ChangeNotifier {
     }
   }
 
-  void deleteNode(OsmCameraNode node) {
+  void deleteNode(OsmNode node) {
     _uploadQueueState.addFromNodeDeletion(node, uploadMode: uploadMode);
     _startUploader();
   }
@@ -270,6 +272,16 @@ class AppState extends ChangeNotifier {
     await _settingsState.setFollowMeMode(mode);
   }
 
+  /// Set proximity alerts enabled/disabled
+  Future<void> setProximityAlertsEnabled(bool enabled) async {
+    await _settingsState.setProximityAlertsEnabled(enabled);
+  }
+
+  /// Set proximity alert distance
+  Future<void> setProximityAlertDistance(int distance) async {
+    await _settingsState.setProximityAlertDistance(distance);
+  }
+
   // ---------- Queue Methods ----------
   void clearQueue() {
     _uploadQueueState.clearQueue();

lib/dev_config.dart

@@ -46,6 +46,12 @@ const Duration kDebounceCameraRefresh = Duration(milliseconds: 500);
 const Duration kFollowMeAnimationDuration = Duration(milliseconds: 600);
 const double kMinSpeedForRotationMps = 1.0; // Minimum speed (m/s) to apply rotation
 
+// Proximity alerts configuration
+const int kProximityAlertDefaultDistance = 200; // meters
+const int kProximityAlertMinDistance = 50; // meters
+const int kProximityAlertMaxDistance = 1000; // meters
+const Duration kProximityAlertCooldown = Duration(minutes: 10); // Cooldown between alerts for same node
+
 // Last map location and settings storage
 const String kLastMapLatKey = 'last_map_latitude';
 const String kLastMapLngKey = 'last_map_longitude';

lib/models/osm_node.dart

@@ -1,11 +1,11 @@
 import 'package:latlong2/latlong.dart';
 
-class OsmCameraNode {
+class OsmNode {
   final int id;
   final LatLng coord;
   final Map<String, String> tags;
 
-  OsmCameraNode({
+  OsmNode({
     required this.id,
     required this.coord,
     required this.tags,
@@ -18,14 +18,14 @@ class OsmCameraNode {
     'tags': tags,
   };
 
-  factory OsmCameraNode.fromJson(Map<String, dynamic> json) {
+  factory OsmNode.fromJson(Map<String, dynamic> json) {
     final tags = <String, String>{};
     if (json['tags'] != null) {
       (json['tags'] as Map<String, dynamic>).forEach((k, v) {
         tags[k.toString()] = v.toString();
       });
     }
-    return OsmCameraNode(
+    return OsmNode(
       id: json['id'] is int ? json['id'] as int : int.tryParse(json['id'].toString()) ?? 0,
       coord: LatLng((json['lat'] as num).toDouble(), (json['lon'] as num).toDouble()),
       tags: tags,
@@ -51,5 +51,4 @@ class OsmCameraNode {
     final normalized = ((val % 360) + 360) % 360;
     return normalized;
   }
-}
+}
-

lib/screens/settings_screen.dart

@@ -8,6 +8,7 @@ import 'settings_screen_sections/offline_areas_section.dart';
 import 'settings_screen_sections/offline_mode_section.dart';
 import 'settings_screen_sections/about_section.dart';
 import 'settings_screen_sections/max_nodes_section.dart';
+import 'settings_screen_sections/proximity_alerts_section.dart';
 import 'settings_screen_sections/tile_provider_section.dart';
 import 'settings_screen_sections/language_section.dart';
 import '../services/localization_service.dart';
@@ -40,6 +41,8 @@ class SettingsScreen extends StatelessWidget {
             const Divider(),
             const MaxNodesSection(),
             const Divider(),
+            const ProximityAlertsSection(),
+            const Divider(),
             const TileProviderSection(),
             const Divider(),
             const OfflineModeSection(),

lib/screens/settings_screen_sections/proximity_alerts_section.dart

@@ -0,0 +1,120 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:provider/provider.dart';
+
+import '../../app_state.dart';
+import '../../services/localization_service.dart';
+import '../../dev_config.dart';
+
+/// Settings section for proximity alerts configuration
+/// Follows brutalist principles: simple, explicit UI that matches existing patterns
+class ProximityAlertsSection extends StatefulWidget {
+  const ProximityAlertsSection({super.key});
+
+  @override
+  State<ProximityAlertsSection> createState() => _ProximityAlertsSectionState();
+}
+
+class _ProximityAlertsSectionState extends State<ProximityAlertsSection> {
+  late final TextEditingController _distanceController;
+
+  @override
+  void initState() {
+    super.initState();
+    final appState = context.read<AppState>();
+    _distanceController = TextEditingController(
+      text: appState.proximityAlertDistance.toString(),
+    );
+  }
+
+  @override
+  void dispose() {
+    _distanceController.dispose();
+    super.dispose();
+  }
+
+  void _updateDistance(AppState appState) {
+    final text = _distanceController.text.trim();
+    final distance = int.tryParse(text);
+    if (distance != null) {
+      appState.setProximityAlertDistance(distance);
+    } else {
+      // Reset to current value if invalid
+      _distanceController.text = appState.proximityAlertDistance.toString();
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Consumer<AppState>(
+      builder: (context, appState, child) {
+        return Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(
+              'Proximity Alerts',
+              style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                fontWeight: FontWeight.bold,
+              ),
+            ),
+            const SizedBox(height: 8),
+            
+            // Enable/disable toggle
+            SwitchListTile(
+              title: const Text('Enable proximity alerts'),
+              subtitle: const Text(
+                'Get notified when approaching surveillance devices\n'
+                'Uses extra battery for continuous location monitoring',
+                style: TextStyle(fontSize: 12),
+              ),
+              value: appState.proximityAlertsEnabled,
+              onChanged: (enabled) {
+                appState.setProximityAlertsEnabled(enabled);
+              },
+              contentPadding: EdgeInsets.zero,
+            ),
+            
+            // Distance setting (only show when enabled)
+            if (appState.proximityAlertsEnabled) ...[
+              const SizedBox(height: 12),
+              Row(
+                children: [
+                  const Text('Alert distance: '),
+                  SizedBox(
+                    width: 80,
+                    child: TextField(
+                      controller: _distanceController,
+                      keyboardType: TextInputType.number,
+                      inputFormatters: [
+                        FilteringTextInputFormatter.digitsOnly,
+                      ],
+                      decoration: const InputDecoration(
+                        isDense: true,
+                        contentPadding: EdgeInsets.symmetric(
+                          horizontal: 8, 
+                          vertical: 8,
+                        ),
+                        border: OutlineInputBorder(),
+                      ),
+                      onSubmitted: (_) => _updateDistance(appState),
+                      onEditingComplete: () => _updateDistance(appState),
+                    ),
+                  ),
+                  const SizedBox(width: 8),
+                  const Text('meters'),
+                ],
+              ),
+              const SizedBox(height: 8),
+              Text(
+                'Range: $kProximityAlertMinDistance-$kProximityAlertMaxDistance meters (default: $kProximityAlertDefaultDistance)',
+                style: Theme.of(context).textTheme.bodySmall?.copyWith(
+                  color: Theme.of(context).textTheme.bodySmall?.color?.withOpacity(0.6),
+                ),
+              ),
+            ],
+          ],
+        );
+      },
+    );
+  }
+}

lib/services/map_data_provider.dart

@@ -3,7 +3,7 @@ import 'package:flutter_map/flutter_map.dart';
 import 'package:flutter/foundation.dart';
 
 import '../models/node_profile.dart';
-import '../models/osm_camera_node.dart';
+import '../models/osm_node.dart';
 import '../app_state.dart';
 import 'map_data_submodules/nodes_from_overpass.dart';
 import 'map_data_submodules/nodes_from_osm_api.dart';
@@ -35,7 +35,7 @@ class MapDataProvider {
 
   /// Fetch surveillance nodes from OSM/Overpass or local storage.
   /// Remote is default. If source is MapSource.auto, remote is tried first unless offline.
-  Future<List<OsmCameraNode>> getNodes({
+  Future<List<OsmNode>> getNodes({
     required LatLngBounds bounds,
     required List<NodeProfile> profiles,
     UploadMode uploadMode = UploadMode.production,
@@ -70,7 +70,7 @@ class MapDataProvider {
       if (uploadMode == UploadMode.sandbox) {
         // Offline + Sandbox = no nodes (local cache is production data)
         debugPrint('[MapDataProvider] Offline + Sandbox mode: returning no nodes (local cache is production data)');
-        return <OsmCameraNode>[];
+        return <OsmNode>[];
       } else {
         // Offline + Production = use local cache
         return fetchLocalNodes(
@@ -90,7 +90,7 @@ class MapDataProvider {
       );
     } else {
       // Production mode: fetch both remote and local, then merge with deduplication
-      final List<Future<List<OsmCameraNode>>> futures = [];
+      final List<Future<List<OsmNode>>> futures = [];
       
       // Always try to get local nodes (fast, cached)
       futures.add(fetchLocalNodes(
@@ -107,7 +107,7 @@ class MapDataProvider {
         maxResults: AppState.instance.maxCameras,
       ).catchError((e) {
         debugPrint('[MapDataProvider] Remote node fetch failed, error: $e. Continuing with local only.');
-        return <OsmCameraNode>[]; // Return empty list on remote failure
+        return <OsmNode>[]; // Return empty list on remote failure
       }));
       
       // Wait for both, then merge with deduplication by node ID
@@ -116,7 +116,7 @@ class MapDataProvider {
       final remoteNodes = results[1];
       
       // Merge with deduplication - prefer remote data over local for same node ID
-      final Map<int, OsmCameraNode> mergedNodes = {};
+      final Map<int, OsmNode> mergedNodes = {};
       
       // Add local nodes first
       for (final node in localNodes) {
@@ -140,7 +140,7 @@ class MapDataProvider {
 
   /// Bulk/paged node fetch for offline downloads (handling paging, dedup, and Overpass retries)
   /// Only use for offline area download, not for map browsing! Ignores maxCameras config.
-  Future<List<OsmCameraNode>> getAllNodesForDownload({
+  Future<List<OsmNode>> getAllNodesForDownload({
     required LatLngBounds bounds,
     required List<NodeProfile> profiles,
     UploadMode uploadMode = UploadMode.production,
@@ -214,7 +214,7 @@ class MapDataProvider {
   }
 
   /// Fetch remote nodes with Overpass first, OSM API fallback
-  Future<List<OsmCameraNode>> _fetchRemoteNodes({
+  Future<List<OsmNode>> _fetchRemoteNodes({
     required LatLngBounds bounds,
     required List<NodeProfile> profiles,
     UploadMode uploadMode = UploadMode.production,

lib/services/map_data_submodules/nodes_from_local.dart

@@ -3,19 +3,19 @@ import 'dart:convert';
 import 'package:flutter/foundation.dart';
 import 'package:latlong2/latlong.dart';
 import 'package:flutter_map/flutter_map.dart' show LatLngBounds;
-import '../../models/osm_camera_node.dart';
+import '../../models/osm_node.dart';
 import '../../models/node_profile.dart';
 import '../offline_area_service.dart';
 import '../offline_areas/offline_area_models.dart';
 
 /// Fetch surveillance nodes from all offline areas intersecting the bounds/profile list.
-Future<List<OsmCameraNode>> fetchLocalNodes({
+Future<List<OsmNode>> fetchLocalNodes({
   required LatLngBounds bounds,
   required List<NodeProfile> profiles,
   int? maxNodes,
 }) async {
   final areas = OfflineAreaService().offlineAreas;
-  final Map<int, OsmCameraNode> deduped = {};
+  final Map<int, OsmNode> deduped = {};
 
   for (final area in areas) {
     if (area.status != OfflineAreaStatus.complete) continue;
@@ -38,7 +38,7 @@ Future<List<OsmCameraNode>> fetchLocalNodes({
 }
 
 // Try in-memory first, else load from disk
-Future<List<OsmCameraNode>> _loadAreaNodes(OfflineArea area) async {
+Future<List<OsmNode>> _loadAreaNodes(OfflineArea area) async {
   if (area.nodes.isNotEmpty) {
     return area.nodes;
   }
@@ -58,7 +58,7 @@ Future<List<OsmCameraNode>> _loadAreaNodes(OfflineArea area) async {
     try {
       final str = await fileToLoad.readAsString();
       final jsonList = jsonDecode(str) as List;
-      return jsonList.map((e) => OsmCameraNode.fromJson(e)).toList();
+      return jsonList.map((e) => OsmNode.fromJson(e)).toList();
     } catch (e) {
       debugPrint('[_loadAreaNodes] Error loading nodes from ${fileToLoad.path}: $e');
     }
@@ -74,14 +74,14 @@ bool _pointInBounds(LatLng pt, LatLngBounds bounds) {
          pt.longitude <= bounds.northEast.longitude;
 }
 
-bool _matchesAnyProfile(OsmCameraNode node, List<NodeProfile> profiles) {
+bool _matchesAnyProfile(OsmNode node, List<NodeProfile> profiles) {
   for (final prof in profiles) {
     if (_nodeMatchesProfile(node, prof)) return true;
   }
   return false;
 }
 
-bool _nodeMatchesProfile(OsmCameraNode node, NodeProfile profile) {
+bool _nodeMatchesProfile(OsmNode node, NodeProfile profile) {
   for (final e in profile.tags.entries) {
     if (node.tags[e.key] != e.value) return false; // All profile tags must match
   }

lib/services/map_data_submodules/nodes_from_osm_api.dart

@@ -6,13 +6,13 @@ import 'package:flutter_map/flutter_map.dart';
 import 'package:xml/xml.dart';
 
 import '../../models/node_profile.dart';
-import '../../models/osm_camera_node.dart';
+import '../../models/osm_node.dart';
 import '../../app_state.dart';
 import '../network_status.dart';
 
 /// Fetches surveillance nodes from the direct OSM API using bbox query.
 /// This is a fallback for when Overpass is not available (e.g., sandbox mode).
-Future<List<OsmCameraNode>> fetchOsmApiNodes({
+Future<List<OsmNode>> fetchOsmApiNodes({
   required LatLngBounds bounds,
   required List<NodeProfile> profiles,
   UploadMode uploadMode = UploadMode.production,
@@ -47,7 +47,7 @@ Future<List<OsmCameraNode>> fetchOsmApiNodes({
     
     // Parse XML response
     final document = XmlDocument.parse(response.body);
-    final nodes = <OsmCameraNode>[];
+    final nodes = <OsmNode>[];
     
     // Find all node elements
     for (final nodeElement in document.findAllElements('node')) {
@@ -73,7 +73,7 @@ Future<List<OsmCameraNode>> fetchOsmApiNodes({
       
       // Check if this node matches any of our profiles
       if (_nodeMatchesProfiles(tags, profiles)) {
-        nodes.add(OsmCameraNode(
+        nodes.add(OsmNode(
           id: id,
           coord: LatLng(lat, lon),
           tags: tags,

lib/services/map_data_submodules/nodes_from_overpass.dart

@@ -5,13 +5,13 @@ import 'package:latlong2/latlong.dart';
 import 'package:flutter_map/flutter_map.dart';
 
 import '../../models/node_profile.dart';
-import '../../models/osm_camera_node.dart';
+import '../../models/osm_node.dart';
 import '../../models/pending_upload.dart';
 import '../../app_state.dart';
 import '../network_status.dart';
 
 /// Fetches surveillance nodes from the Overpass OSM API for the given bounds and profiles.
-Future<List<OsmCameraNode>> fetchOverpassNodes({
+Future<List<OsmNode>> fetchOverpassNodes({
   required LatLngBounds bounds,
   required List<NodeProfile> profiles,
   UploadMode uploadMode = UploadMode.production,
@@ -49,7 +49,7 @@ Future<List<OsmCameraNode>> fetchOverpassNodes({
     NetworkStatus.instance.reportOverpassSuccess();
     
     final nodes = elements.whereType<Map<String, dynamic>>().map((element) {
-      return OsmCameraNode(
+      return OsmNode(
         id: element['id'],
         coord: LatLng(element['lat'], element['lon']),
         tags: Map<String, String>.from(element['tags'] ?? {}),
@@ -101,7 +101,7 @@ $outputClause
 }
 
 /// Clean up pending uploads that now appear in Overpass results
-void _cleanupCompletedUploads(List<OsmCameraNode> overpassNodes) {
+void _cleanupCompletedUploads(List<OsmNode> overpassNodes) {
   try {
     final appState = AppState.instance;
     final pendingUploads = appState.pendingUploads;

lib/services/node_cache.dart

@@ -1,5 +1,5 @@
 import 'package:latlong2/latlong.dart';
-import '../models/osm_camera_node.dart';
+import '../models/osm_node.dart';
 import 'package:flutter_map/flutter_map.dart' show LatLngBounds;
 
 class NodeCache {
@@ -8,10 +8,10 @@ class NodeCache {
   factory NodeCache() => instance;
   NodeCache._internal();
 
-  final Map<int, OsmCameraNode> _nodes = {};
+  final Map<int, OsmNode> _nodes = {};
 
   /// Add or update a batch of nodes in the cache.
-  void addOrUpdate(List<OsmCameraNode> nodes) {
+  void addOrUpdate(List<OsmNode> nodes) {
     for (var node in nodes) {
       final existing = _nodes[node.id];
       if (existing != null) {
@@ -22,7 +22,7 @@ class NodeCache {
             mergedTags[entry.key] = entry.value;
           }
         }
-        _nodes[node.id] = OsmCameraNode(
+        _nodes[node.id] = OsmNode(
           id: node.id,
           coord: node.coord,
           tags: mergedTags,
@@ -34,14 +34,14 @@ class NodeCache {
   }
 
   /// Query for all cached nodes currently within the given LatLngBounds.
-  List<OsmCameraNode> queryByBounds(LatLngBounds bounds) {
+  List<OsmNode> queryByBounds(LatLngBounds bounds) {
     return _nodes.values
         .where((node) => _inBounds(node.coord, bounds))
         .toList();
   }
 
   /// Retrieve all cached nodes.
-  List<OsmCameraNode> getAll() => _nodes.values.toList();
+  List<OsmNode> getAll() => _nodes.values.toList();
 
   /// Optionally clear the cache (rarely needed)
   void clear() => _nodes.clear();
@@ -53,7 +53,7 @@ class NodeCache {
       final cleanTags = Map<String, String>.from(node.tags);
       cleanTags.remove('_pending_edit');
       
-      _nodes[nodeId] = OsmCameraNode(
+      _nodes[nodeId] = OsmNode(
         id: node.id,
         coord: node.coord,
         tags: cleanTags,

lib/services/offline_area_service.dart

@@ -8,7 +8,7 @@ import 'offline_areas/offline_area_models.dart';
 import 'offline_areas/offline_tile_utils.dart';
 import 'offline_areas/offline_area_downloader.dart';
 
-import '../models/osm_camera_node.dart';
+import '../models/osm_node.dart';
 import '../app_state.dart';
 import 'map_data_provider.dart';
 import 'package:deflockapp/dev_config.dart';

lib/services/offline_areas/offline_area_downloader.dart

@@ -6,7 +6,7 @@ import 'package:latlong2/latlong.dart';
 import 'package:flutter_map/flutter_map.dart' show LatLngBounds;
 
 import '../../app_state.dart';
-import '../../models/osm_camera_node.dart';
+import '../../models/osm_node.dart';
 import '../map_data_provider.dart';
 import 'offline_area_models.dart';
 import 'offline_tile_utils.dart';
@@ -182,7 +182,7 @@ class OfflineAreaDownloader {
   }
 
   /// Save nodes to disk as JSON
-  static Future<void> saveNodes(List<OsmCameraNode> nodes, String dir) async {
+  static Future<void> saveNodes(List<OsmNode> nodes, String dir) async {
     final file = File('$dir/nodes.json');
     await file.writeAsString(jsonEncode(nodes.map((n) => n.toJson()).toList()));
   }

lib/services/offline_areas/offline_area_models.dart

@@ -1,6 +1,6 @@
 import 'package:latlong2/latlong.dart';
 import 'package:flutter_map/flutter_map.dart' show LatLngBounds;
-import '../../models/osm_camera_node.dart';
+import '../../models/osm_node.dart';
 
 /// Status of an offline area
 enum OfflineAreaStatus { downloading, complete, error, cancelled }
@@ -17,7 +17,7 @@ class OfflineArea {
   double progress; // 0.0 - 1.0
   int tilesDownloaded;
   int tilesTotal;
-  List<OsmCameraNode> nodes;
+  List<OsmNode> nodes;
   int sizeBytes; // Disk size in bytes
   final bool isPermanent; // Not user-deletable if true
   
@@ -88,7 +88,7 @@ class OfflineArea {
       tilesDownloaded: json['tilesDownloaded'] ?? 0,
       tilesTotal: json['tilesTotal'] ?? 0,
       nodes: (json['nodes'] as List? ?? json['cameras'] as List? ?? [])
-          .map((e) => OsmCameraNode.fromJson(e)).toList(),
+          .map((e) => OsmNode.fromJson(e)).toList(),
       sizeBytes: json['sizeBytes'] ?? 0,
       isPermanent: json['isPermanent'] ?? false,
       tileProviderId: json['tileProviderId'],

lib/services/proximity_alert_service.dart

@@ -0,0 +1,199 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+import 'package:geolocator/geolocator.dart';
+import 'package:latlong2/latlong.dart';
+
+import '../models/osm_node.dart';
+import '../models/node_profile.dart';
+import '../dev_config.dart';
+
+/// Simple data class for tracking recent proximity alerts to prevent spam
+class RecentAlert {
+  final int nodeId;
+  final DateTime alertTime;
+  
+  RecentAlert({required this.nodeId, required this.alertTime});
+}
+
+/// Service for handling proximity alerts when approaching surveillance nodes
+/// Follows brutalist principles: simple, explicit, easy to understand
+class ProximityAlertService {
+  static final ProximityAlertService _instance = ProximityAlertService._internal();
+  factory ProximityAlertService() => _instance;
+  ProximityAlertService._internal();
+
+  FlutterLocalNotificationsPlugin? _notifications;
+  bool _isInitialized = false;
+  
+  // Simple in-memory tracking of recent alerts to prevent spam
+  final List<RecentAlert> _recentAlerts = [];
+  static const Duration _alertCooldown = kProximityAlertCooldown;
+  
+  // Callback for showing in-app visual alerts
+  VoidCallback? _onVisualAlert;
+  
+  /// Initialize the notification plugin
+  Future<void> initialize({VoidCallback? onVisualAlert}) async {
+    _onVisualAlert = onVisualAlert;
+    
+    _notifications = FlutterLocalNotificationsPlugin();
+    
+    const androidSettings = AndroidInitializationSettings('@mipmap/ic_launcher');
+    const iosSettings = DarwinInitializationSettings(
+      requestAlertPermission: true,
+      requestBadgePermission: true,
+      requestSoundPermission: true,
+    );
+    
+    const initSettings = InitializationSettings(
+      android: androidSettings,
+      iOS: iosSettings,
+    );
+    
+    try {
+      final initialized = await _notifications!.initialize(initSettings);
+      _isInitialized = initialized ?? false;
+      debugPrint('[ProximityAlertService] Initialized: $_isInitialized');
+    } catch (e) {
+      debugPrint('[ProximityAlertService] Failed to initialize: $e');
+      _isInitialized = false;
+    }
+  }
+  
+  /// Check proximity to nodes and trigger alerts if needed
+  /// This should be called on GPS position updates
+  Future<void> checkProximity({
+    required LatLng userLocation,
+    required List<OsmNode> nodes,
+    required List<NodeProfile> enabledProfiles,
+    required int alertDistance,
+  }) async {
+    if (!_isInitialized || nodes.isEmpty) return;
+    
+    // Clean up old alerts (anything older than cooldown period)
+    final cutoffTime = DateTime.now().subtract(_alertCooldown);
+    _recentAlerts.removeWhere((alert) => alert.alertTime.isBefore(cutoffTime));
+    
+    // Check each node for proximity
+    for (final node in nodes) {
+      // Skip if we recently alerted for this node
+      if (_recentAlerts.any((alert) => alert.nodeId == node.id)) {
+        continue;
+      }
+      
+      // Calculate distance using Geolocator's distanceBetween
+      final distance = Geolocator.distanceBetween(
+        userLocation.latitude,
+        userLocation.longitude,
+        node.coord.latitude,
+        node.coord.longitude,
+      );
+      
+      // Check if within alert distance
+      if (distance <= alertDistance) {
+        // Determine node type for alert message
+        final nodeType = _getNodeTypeDescription(node, enabledProfiles);
+        
+        // Trigger both push notification and visual alert
+        await _showNotification(node, nodeType, distance.round());
+        _showVisualAlert();
+        
+        // Track this alert to prevent spam
+        _recentAlerts.add(RecentAlert(
+          nodeId: node.id,
+          alertTime: DateTime.now(),
+        ));
+        
+        debugPrint('[ProximityAlertService] Alert triggered for node ${node.id} ($nodeType) at ${distance.round()}m');
+      }
+    }
+  }
+  
+  /// Show push notification for proximity alert
+  Future<void> _showNotification(OsmNode node, String nodeType, int distance) async {
+    if (!_isInitialized || _notifications == null) return;
+    
+    const androidDetails = AndroidNotificationDetails(
+      'proximity_alerts',
+      'Proximity Alerts',
+      channelDescription: 'Notifications when approaching surveillance devices',
+      importance: Importance.high,
+      priority: Priority.high,
+      enableVibration: true,
+      playSound: true,
+    );
+    
+    const iosDetails = DarwinNotificationDetails(
+      presentAlert: true,
+      presentBadge: false,
+      presentSound: true,
+    );
+    
+    const notificationDetails = NotificationDetails(
+      android: androidDetails,
+      iOS: iosDetails,
+    );
+    
+    final title = 'Surveillance Device Nearby';
+    final body = '$nodeType detected ${distance}m ahead';
+    
+    try {
+      await _notifications!.show(
+        node.id, // Use node ID as notification ID
+        title,
+        body,
+        notificationDetails,
+      );
+    } catch (e) {
+      debugPrint('[ProximityAlertService] Failed to show notification: $e');
+    }
+  }
+  
+  /// Trigger visual alert in the app UI
+  void _showVisualAlert() {
+    _onVisualAlert?.call();
+  }
+  
+  /// Get a user-friendly description of the node type
+  String _getNodeTypeDescription(OsmNode node, List<NodeProfile> enabledProfiles) {
+    final tags = node.tags;
+    
+    // Check for specific surveillance types
+    if (tags.containsKey('man_made') && tags['man_made'] == 'surveillance') {
+      final surveillanceType = tags['surveillance:type'] ?? 'surveillance device';
+      if (surveillanceType == 'camera') return 'Camera';
+      if (surveillanceType == 'ALPR') return 'License plate reader';
+      return 'Surveillance device';
+    }
+    
+    // Check for emergency devices
+    if (tags.containsKey('emergency') && tags['emergency'] == 'siren') {
+      return 'Emergency siren';
+    }
+    
+    // Fall back to checking enabled profiles to see what type this might be
+    for (final profile in enabledProfiles) {
+      bool matches = true;
+      for (final entry in profile.tags.entries) {
+        if (node.tags[entry.key] != entry.value) {
+          matches = false;
+          break;
+        }
+      }
+      if (matches) {
+        return profile.name;
+      }
+    }
+    
+    return 'Surveillance device';
+  }
+  
+  /// Get count of recent alerts (for debugging/testing)
+  int get recentAlertCount => _recentAlerts.length;
+  
+  /// Clear recent alerts (for testing)
+  void clearRecentAlerts() {
+    _recentAlerts.clear();
+  }
+}

lib/state/session_state.dart

@@ -3,7 +3,7 @@ import 'package:latlong2/latlong.dart';
 
 import '../models/node_profile.dart';
 import '../models/operator_profile.dart';
-import '../models/osm_camera_node.dart';
+import '../models/osm_node.dart';
 
 // ------------------ AddNodeSession ------------------
 class AddNodeSession {
@@ -23,7 +23,7 @@ class EditNodeSession {
     required this.target,
   });
   
-  final OsmCameraNode originalNode; // The original node being edited
+  final OsmNode originalNode; // The original node being edited
   NodeProfile profile;
   OperatorProfile? operatorProfile;
   double directionDegrees;
@@ -48,7 +48,7 @@ class SessionState extends ChangeNotifier {
     notifyListeners();
   }
 
-  void startEditSession(OsmCameraNode node, List<NodeProfile> enabledProfiles) {
+  void startEditSession(OsmNode node, List<NodeProfile> enabledProfiles) {
     final submittableProfiles = enabledProfiles.where((p) => p.isSubmittable).toList();
     
     // Try to find a matching profile based on the node's tags

lib/state/settings_state.dart

@@ -24,11 +24,15 @@ class SettingsState extends ChangeNotifier {
   static const String _selectedTileTypePrefsKey = 'selected_tile_type';
   static const String _legacyTestModePrefsKey = 'test_mode';
   static const String _followMeModePrefsKey = 'follow_me_mode';
+  static const String _proximityAlertsEnabledPrefsKey = 'proximity_alerts_enabled';
+  static const String _proximityAlertDistancePrefsKey = 'proximity_alert_distance';
 
   bool _offlineMode = false;
   int _maxCameras = 250;
   UploadMode _uploadMode = kEnableDevelopmentModes ? UploadMode.simulate : UploadMode.production;
   FollowMeMode _followMeMode = FollowMeMode.northUp;
+  bool _proximityAlertsEnabled = false;
+  int _proximityAlertDistance = kProximityAlertDefaultDistance;
   List<TileProvider> _tileProviders = [];
   String _selectedTileTypeId = '';
 
@@ -37,6 +41,8 @@ class SettingsState extends ChangeNotifier {
   int get maxCameras => _maxCameras;
   UploadMode get uploadMode => _uploadMode;
   FollowMeMode get followMeMode => _followMeMode;
+  bool get proximityAlertsEnabled => _proximityAlertsEnabled;
+  int get proximityAlertDistance => _proximityAlertDistance;
   List<TileProvider> get tileProviders => List.unmodifiable(_tileProviders);
   String get selectedTileTypeId => _selectedTileTypeId;
   
@@ -85,6 +91,10 @@ class SettingsState extends ChangeNotifier {
       _maxCameras = prefs.getInt(_maxCamerasPrefsKey) ?? 250;
     }
     
+    // Load proximity alerts settings
+    _proximityAlertsEnabled = prefs.getBool(_proximityAlertsEnabledPrefsKey) ?? false;
+    _proximityAlertDistance = prefs.getInt(_proximityAlertDistancePrefsKey) ?? kProximityAlertDefaultDistance;
+    
     // Load upload mode (including migration from old test_mode bool)
     if (prefs.containsKey(_uploadModePrefsKey)) {
       final idx = prefs.getInt(_uploadModePrefsKey) ?? 0;
@@ -253,4 +263,26 @@ class SettingsState extends ChangeNotifier {
     }
   }
 
+  /// Set proximity alerts enabled/disabled
+  Future<void> setProximityAlertsEnabled(bool enabled) async {
+    if (_proximityAlertsEnabled != enabled) {
+      _proximityAlertsEnabled = enabled;
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setBool(_proximityAlertsEnabledPrefsKey, enabled);
+      notifyListeners();
+    }
+  }
+
+  /// Set proximity alert distance in meters
+  Future<void> setProximityAlertDistance(int distance) async {
+    if (distance < kProximityAlertMinDistance) distance = kProximityAlertMinDistance;
+    if (distance > kProximityAlertMaxDistance) distance = kProximityAlertMaxDistance;
+    if (_proximityAlertDistance != distance) {
+      _proximityAlertDistance = distance;
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setInt(_proximityAlertDistancePrefsKey, distance);
+      notifyListeners();
+    }
+  }
+
 }

lib/state/upload_queue_state.dart

@@ -4,7 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 import '../models/pending_upload.dart';
-import '../models/osm_camera_node.dart';
+import '../models/osm_node.dart';
 import '../models/node_profile.dart';
 import '../services/node_cache.dart';
 import '../services/uploader.dart';
@@ -46,7 +46,7 @@ class UploadQueueState extends ChangeNotifier {
     final tags = upload.getCombinedTags();
     tags['_pending_upload'] = 'true'; // Mark as pending for potential UI distinction
     
-    final tempNode = OsmCameraNode(
+    final tempNode = OsmNode(
       id: tempId,
       coord: upload.coord,
       tags: tags,
@@ -80,7 +80,7 @@ class UploadQueueState extends ChangeNotifier {
     final originalTags = Map<String, String>.from(session.originalNode.tags);
     originalTags['_pending_edit'] = 'true'; // Mark original as having pending edit
     
-    final originalNode = OsmCameraNode(
+    final originalNode = OsmNode(
       id: session.originalNode.id,
       coord: session.originalNode.coord, // Keep at original location
       tags: originalTags,
@@ -92,7 +92,7 @@ class UploadQueueState extends ChangeNotifier {
     editedTags['_pending_upload'] = 'true'; // Mark as pending upload
     editedTags['_original_node_id'] = session.originalNode.id.toString(); // Track original for line drawing
     
-    final editedNode = OsmCameraNode(
+    final editedNode = OsmNode(
       id: tempId,
       coord: upload.coord, // At new location
       tags: editedTags,
@@ -106,7 +106,7 @@ class UploadQueueState extends ChangeNotifier {
   }
 
   // Add a node deletion to the upload queue
-  void addFromNodeDeletion(OsmCameraNode node, {required UploadMode uploadMode}) {
+  void addFromNodeDeletion(OsmNode node, {required UploadMode uploadMode}) {
     final upload = PendingUpload(
       coord: node.coord,
       direction: node.directionDeg ?? 0, // Use existing direction or default to 0
@@ -123,7 +123,7 @@ class UploadQueueState extends ChangeNotifier {
     final deletionTags = Map<String, String>.from(node.tags);
     deletionTags['_pending_deletion'] = 'true';
     
-    final nodeWithDeletionTag = OsmCameraNode(
+    final nodeWithDeletionTag = OsmNode(
       id: node.id,
       coord: node.coord,
       tags: deletionTags,
@@ -259,7 +259,7 @@ class UploadQueueState extends ChangeNotifier {
     // Create the node with real ID and clean tags (remove temp markers)
     final tags = item.getCombinedTags();
     
-    final realNode = OsmCameraNode(
+    final realNode = OsmNode(
       id: realNodeId,
       coord: item.coord,
       tags: tags, // Clean tags without _pending_upload markers

lib/widgets/camera_provider_with_cache.dart

@@ -7,7 +7,7 @@ import '../services/map_data_provider.dart';
 import '../services/node_cache.dart';
 import '../services/network_status.dart';
 import '../models/node_profile.dart';
-import '../models/osm_camera_node.dart';
+import '../models/osm_node.dart';
 import '../app_state.dart';
 
 /// Provides surveillance nodes for a map view, using an in-memory cache and optionally
@@ -21,7 +21,7 @@ class CameraProviderWithCache extends ChangeNotifier {
 
   /// Call this to get (quickly) all cached overlays for the given view.
   /// Filters by currently enabled profiles.
-  List<OsmCameraNode> getCachedNodesForBounds(LatLngBounds bounds) {
+  List<OsmNode> getCachedNodesForBounds(LatLngBounds bounds) {
     final allNodes = NodeCache.instance.queryByBounds(bounds);
     final enabledProfiles = AppState.instance.enabledProfiles;
     
@@ -79,7 +79,7 @@ class CameraProviderWithCache extends ChangeNotifier {
   }
 
   /// Check if a node matches any of the provided profiles
-  bool _matchesAnyProfile(OsmCameraNode node, List<NodeProfile> profiles) {
+  bool _matchesAnyProfile(OsmNode node, List<NodeProfile> profiles) {
     for (final profile in profiles) {
       if (_nodeMatchesProfile(node, profile)) return true;
     }
@@ -87,7 +87,7 @@ class CameraProviderWithCache extends ChangeNotifier {
   }
 
   /// Check if a node matches a specific profile (all profile tags must match)
-  bool _nodeMatchesProfile(OsmCameraNode node, NodeProfile profile) {
+  bool _nodeMatchesProfile(OsmNode node, NodeProfile profile) {
     for (final entry in profile.tags.entries) {
       if (node.tags[entry.key] != entry.value) return false;
     }

lib/widgets/map/camera_markers.dart

@@ -4,13 +4,13 @@ import 'package:flutter_map/flutter_map.dart';
 import 'package:latlong2/latlong.dart';
 
 import '../../dev_config.dart';
-import '../../models/osm_camera_node.dart';
+import '../../models/osm_node.dart';
 import '../node_tag_sheet.dart';
 import '../camera_icon.dart';
 
 /// Smart marker widget for camera with single/double tap distinction
 class CameraMapMarker extends StatefulWidget {
-  final OsmCameraNode node;
+  final OsmNode node;
   final MapController mapController;
   const CameraMapMarker({required this.node, required this.mapController, Key? key}) : super(key: key);
 
@@ -76,7 +76,7 @@ class _CameraMapMarkerState extends State<CameraMapMarker> {
 /// Helper class to build marker layers for cameras and user location
 class CameraMarkersBuilder {
   static List<Marker> buildCameraMarkers({
-    required List<OsmCameraNode> cameras,
+    required List<OsmNode> cameras,
     required MapController mapController,
     LatLng? userLocation,
   }) {
@@ -104,7 +104,7 @@ class CameraMarkersBuilder {
     return markers;
   }
 
-  static bool _isValidCameraCoordinate(OsmCameraNode node) {
+  static bool _isValidCameraCoordinate(OsmNode node) {
     return (node.coord.latitude != 0 || node.coord.longitude != 0) &&
            node.coord.latitude.abs() <= 90 && 
            node.coord.longitude.abs() <= 180;

lib/widgets/map/direction_cones.dart

@@ -5,12 +5,12 @@ import 'package:latlong2/latlong.dart';
 
 import '../../app_state.dart';
 import '../../dev_config.dart';
-import '../../models/osm_camera_node.dart';
+import '../../models/osm_node.dart';
 
 /// Helper class to build direction cone polygons for cameras
 class DirectionConesBuilder {
   static List<Polygon> buildDirectionCones({
-    required List<OsmCameraNode> cameras,
+    required List<OsmNode> cameras,
     required double zoom,
     AddNodeSession? session,
     EditNodeSession? editSession,
@@ -52,7 +52,7 @@ class DirectionConesBuilder {
     return overlays;
   }
 
-  static bool _isValidCameraWithDirection(OsmCameraNode node) {
+  static bool _isValidCameraWithDirection(OsmNode node) {
     return node.hasDirection && 
            node.directionDeg != null &&
            (node.coord.latitude != 0 || node.coord.longitude != 0) &&
@@ -60,7 +60,7 @@ class DirectionConesBuilder {
            node.coord.longitude.abs() <= 180;
   }
 
-  static bool _isPendingUpload(OsmCameraNode node) {
+  static bool _isPendingUpload(OsmNode node) {
     return node.tags.containsKey('_pending_upload') && 
            node.tags['_pending_upload'] == 'true';
   }

lib/widgets/map/gps_controller.dart

@@ -6,6 +6,9 @@ import 'package:latlong2/latlong.dart';
 
 import '../../dev_config.dart';
 import '../../app_state.dart' show FollowMeMode;
+import '../../services/proximity_alert_service.dart';
+import '../../models/osm_node.dart';
+import '../../models/node_profile.dart';
 
 /// Manages GPS location tracking, follow-me modes, and location-based map animations.
 /// Handles GPS permissions, position streams, and follow-me behavior.
@@ -81,6 +84,11 @@ class GpsController {
     required FollowMeMode followMeMode,
     required AnimatedMapController controller,
     required VoidCallback onLocationUpdated,
+    // Optional parameters for proximity alerts
+    bool proximityAlertsEnabled = false,
+    int proximityAlertDistance = 200,
+    List<OsmNode> nearbyNodes = const [],
+    List<NodeProfile> enabledProfiles = const [],
   }) {
     final latLng = LatLng(position.latitude, position.longitude);
     _currentLatLng = latLng;
@@ -88,6 +96,16 @@ class GpsController {
     // Notify that location was updated (for setState, etc.)
     onLocationUpdated();
     
+    // Check proximity alerts if enabled
+    if (proximityAlertsEnabled && nearbyNodes.isNotEmpty) {
+      ProximityAlertService().checkProximity(
+        userLocation: latLng,
+        nodes: nearbyNodes,
+        enabledProfiles: enabledProfiles,
+        alertDistance: proximityAlertDistance,
+      );
+    }
+    
     // Handle follow-me animations if enabled - use current mode from app state
     if (followMeMode != FollowMeMode.off) {
       debugPrint('[GpsController] GPS position update: ${latLng.latitude}, ${latLng.longitude}, follow-me: $followMeMode');
@@ -131,6 +149,10 @@ class GpsController {
     required AnimatedMapController controller,
     required VoidCallback onLocationUpdated,
     required FollowMeMode Function() getCurrentFollowMeMode,
+    required bool Function() getProximityAlertsEnabled,
+    required int Function() getProximityAlertDistance,
+    required List<OsmNode> Function() getNearbyNodes,
+    required List<NodeProfile> Function() getEnabledProfiles,
   }) async {
     final perm = await Geolocator.requestPermission();
     if (perm == LocationPermission.denied ||
@@ -142,11 +164,20 @@ class GpsController {
     _positionSub = Geolocator.getPositionStream().listen((Position position) {
       // Get the current follow-me mode from the app state each time
       final currentFollowMeMode = getCurrentFollowMeMode();
+      final proximityAlertsEnabled = getProximityAlertsEnabled();
+      final proximityAlertDistance = getProximityAlertDistance();
+      final nearbyNodes = getNearbyNodes();
+      final enabledProfiles = getEnabledProfiles();
+      
       processPositionUpdate(
         position: position,
         followMeMode: currentFollowMeMode,
         controller: controller,
         onLocationUpdated: onLocationUpdated,
+        proximityAlertsEnabled: proximityAlertsEnabled,
+        proximityAlertDistance: proximityAlertDistance,
+        nearbyNodes: nearbyNodes,
+        enabledProfiles: enabledProfiles,
       );
     });
   }

lib/widgets/map_view.dart

@@ -7,7 +7,7 @@ import 'package:provider/provider.dart';
 import '../app_state.dart';
 import '../services/offline_area_service.dart';
 import '../services/network_status.dart';
-import '../models/osm_camera_node.dart';
+import '../models/osm_node.dart';
 import '../models/node_profile.dart';
 import '../models/tile_provider.dart';
 import 'debouncer.dart';
@@ -21,8 +21,10 @@ import 'map/tile_layer_manager.dart';
 import 'map/camera_refresh_controller.dart';
 import 'map/gps_controller.dart';
 import 'network_status_indicator.dart';
+import 'proximity_alert_banner.dart';
 import '../dev_config.dart';
 import '../app_state.dart' show FollowMeMode;
+import '../services/proximity_alert_service.dart';
 
 class MapView extends StatefulWidget {
   final AnimatedMapController controller;
@@ -55,6 +57,9 @@ class MapViewState extends State<MapView> {
   
   // Track zoom to clear queue on zoom changes
   double? _lastZoom;
+  
+  // State for proximity alert banner
+  bool _showProximityBanner = false;
 
   @override
   void initState() {
@@ -68,6 +73,17 @@ class MapViewState extends State<MapView> {
     _cameraController.initialize(onCamerasUpdated: _onCamerasUpdated);
     _gpsController = GpsController();
     
+    // Initialize proximity alert service
+    ProximityAlertService().initialize(
+      onVisualAlert: () {
+        if (mounted) {
+          setState(() {
+            _showProximityBanner = true;
+          });
+        }
+      },
+    );
+    
     // Load last map position before initializing GPS
     _positionManager.loadLastMapPosition().then((_) {
       // Move to last known position after loading and widget is built
@@ -93,6 +109,59 @@ class MapViewState extends State<MapView> {
         }
         return FollowMeMode.off;
       },
+      getProximityAlertsEnabled: () {
+        if (mounted) {
+          try {
+            return context.read<AppState>().proximityAlertsEnabled;
+          } catch (e) {
+            debugPrint('[MapView] Could not read proximity alerts enabled: $e');
+            return false;
+          }
+        }
+        return false;
+      },
+      getProximityAlertDistance: () {
+        if (mounted) {
+          try {
+            return context.read<AppState>().proximityAlertDistance;
+          } catch (e) {
+            debugPrint('[MapView] Could not read proximity alert distance: $e');
+            return 200;
+          }
+        }
+        return 200;
+      },
+      getNearbyNodes: () {
+        if (mounted) {
+          try {
+            final cameraProvider = context.read<CameraProviderWithCache>();
+            LatLngBounds? mapBounds;
+            try {
+              mapBounds = _controller.mapController.camera.visibleBounds;
+            } catch (_) {
+              return [];
+            }
+            return mapBounds != null 
+                ? cameraProvider.getCachedNodesForBounds(mapBounds)
+                : [];
+          } catch (e) {
+            debugPrint('[MapView] Could not get nearby nodes: $e');
+            return [];
+          }
+        }
+        return [];
+      },
+      getEnabledProfiles: () {
+        if (mounted) {
+          try {
+            return context.read<AppState>().enabledProfiles;
+          } catch (e) {
+            debugPrint('[MapView] Could not read enabled profiles: $e');
+            return [];
+          }
+        }
+        return [];
+      },
     );
 
     // Fetch initial cameras
@@ -265,7 +334,7 @@ class MapViewState extends State<MapView> {
         }
         final cameras = (mapBounds != null)
             ? cameraProvider.getCachedNodesForBounds(mapBounds)
-            : <OsmCameraNode>[];
+            : <OsmNode>[];
         
         final markers = CameraMarkersBuilder.buildCameraMarkers(
           cameras: cameras,
@@ -402,12 +471,22 @@ class MapViewState extends State<MapView> {
 
         // Network status indicator (top-left)
         const NetworkStatusIndicator(),
+        
+        // Proximity alert banner (top)
+        ProximityAlertBanner(
+          isVisible: _showProximityBanner,
+          onDismiss: () {
+            setState(() {
+              _showProximityBanner = false;
+            });
+          },
+        ),
       ],
     );
   }
 
   /// Build polylines connecting original cameras to their edited positions
-  List<Polyline> _buildEditLines(List<OsmCameraNode> cameras) {
+  List<Polyline> _buildEditLines(List<OsmNode> cameras) {
     final lines = <Polyline>[];
     
     // Create a lookup map of original node IDs to their coordinates

lib/widgets/node_tag_sheet.dart

@@ -1,11 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import '../models/osm_camera_node.dart';
+import '../models/osm_node.dart';
 import '../app_state.dart';
 import '../services/localization_service.dart';
 
 class NodeTagSheet extends StatelessWidget {
-  final OsmCameraNode node;
+  final OsmNode node;
 
   const NodeTagSheet({super.key, required this.node});
 

lib/widgets/proximity_alert_banner.dart

@@ -0,0 +1,135 @@
+import 'package:flutter/material.dart';
+
+/// Simple red banner that flashes briefly when proximity alert is triggered
+/// Follows brutalist principles: simple, explicit functionality
+class ProximityAlertBanner extends StatefulWidget {
+  final bool isVisible;
+  final VoidCallback? onDismiss;
+  
+  const ProximityAlertBanner({
+    super.key,
+    required this.isVisible,
+    this.onDismiss,
+  });
+
+  @override
+  State<ProximityAlertBanner> createState() => _ProximityAlertBannerState();
+}
+
+class _ProximityAlertBannerState extends State<ProximityAlertBanner>
+    with SingleTickerProviderStateMixin {
+  late AnimationController _controller;
+  late Animation<double> _animation;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = AnimationController(
+      duration: const Duration(milliseconds: 300),
+      vsync: this,
+    );
+    _animation = CurvedAnimation(
+      parent: _controller,
+      curve: Curves.easeOut,
+    );
+  }
+
+  @override
+  void didUpdateWidget(ProximityAlertBanner oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    
+    if (widget.isVisible != oldWidget.isVisible) {
+      if (widget.isVisible) {
+        _controller.forward();
+        // Auto-hide after 3 seconds
+        Future.delayed(const Duration(seconds: 3), () {
+          if (mounted) {
+            _controller.reverse().then((_) {
+              widget.onDismiss?.call();
+            });
+          }
+        });
+      } else {
+        _controller.reverse();
+      }
+    }
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AnimatedBuilder(
+      animation: _animation,
+      builder: (context, child) {
+        if (_animation.value == 0.0) {
+          return const SizedBox.shrink();
+        }
+        
+        return Positioned(
+          top: MediaQuery.of(context).padding.top,
+          left: 0,
+          right: 0,
+          child: Transform.translate(
+            offset: Offset(0, -60 * (1 - _animation.value)),
+            child: Container(
+              height: 60,
+              decoration: BoxDecoration(
+                color: Colors.red.shade600,
+                boxShadow: [
+                  BoxShadow(
+                    color: Colors.black.withOpacity(0.3),
+                    blurRadius: 10,
+                    offset: const Offset(0, 2),
+                  ),
+                ],
+              ),
+              child: Material(
+                color: Colors.transparent,
+                child: InkWell(
+                  onTap: () {
+                    _controller.reverse().then((_) {
+                      widget.onDismiss?.call();
+                    });
+                  },
+                  child: Padding(
+                    padding: const EdgeInsets.symmetric(horizontal: 16),
+                    child: Row(
+                      children: [
+                        const Icon(
+                          Icons.warning,
+                          color: Colors.white,
+                          size: 24,
+                        ),
+                        const SizedBox(width: 12),
+                        const Expanded(
+                          child: Text(
+                            'Surveillance device nearby',
+                            style: TextStyle(
+                              color: Colors.white,
+                              fontSize: 16,
+                              fontWeight: FontWeight.w600,
+                            ),
+                          ),
+                        ),
+                        const Icon(
+                          Icons.close,
+                          color: Colors.white,
+                          size: 20,
+                        ),
+                      ],
+                    ),
+                  ),
+                ),
+              ),
+            ),
+          ),
+        );
+      },
+    );
+  }
+}

pubspec.lock

@@ -105,6 +105,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
+  dbus:
+    dependency: transitive
+    description:
+      name: dbus
+      sha256: "79e0c23480ff85dc68de79e2cd6334add97e48f7f4865d17686dd6ea81a47e8c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.11"
   desktop_webview_window:
     dependency: transitive
     description:
@@ -150,6 +158,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.14.4"
+  flutter_local_notifications:
+    dependency: "direct main"
+    description:
+      name: flutter_local_notifications
+      sha256: "674173fd3c9eda9d4c8528da2ce0ea69f161577495a9cc835a2a4ecd7eadeb35"
+      url: "https://pub.dev"
+    source: hosted
+    version: "17.2.4"
+  flutter_local_notifications_linux:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_linux
+      sha256: c49bd06165cad9beeb79090b18cd1eb0296f4bf4b23b84426e37dd7c027fc3af
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.1"
+  flutter_local_notifications_platform_interface:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_platform_interface
+      sha256: "85f8d07fe708c1bdcf45037f2c0109753b26ae077e9d9e899d55971711a4ea66"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.2.0"
   flutter_map:
     dependency: "direct main"
     description:
@@ -624,6 +656,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.2.2"
+  timezone:
+    dependency: transitive
+    description:
+      name: timezone
+      sha256: "2236ec079a174ce07434e89fcd3fcda430025eb7692244139a9cf54fdcf1fc7d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.4"
   typed_data:
     dependency: transitive
     description:

pubspec.yaml

@@ -19,6 +19,7 @@ dependencies:
   http: ^1.2.1
   flutter_svg: ^2.0.10
   xml: ^6.4.2
+  flutter_local_notifications: ^17.2.2
 
   # Auth, storage, prefs
   oauth2_client: ^4.2.0