highlight selected node

lib/screens/home_screen.dart

@@ -37,6 +37,9 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
   
   // Flag to prevent map bounce when transitioning from tag sheet to edit sheet
   bool _transitioningToEdit = false;
+  
+  // Track selected node for highlighting
+  int? _selectedNodeId;
 
   @override
   void initState() {
@@ -139,6 +142,7 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
               if (height > 0 && _transitioningToEdit) {
                 _transitioningToEdit = false;
                 _tagSheetHeight = 0.0; // Now safe to reset
+                _selectedNodeId = null; // Clear selection when moving to edit
               }
             });
           },
@@ -157,6 +161,10 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
   }
 
   void openNodeTagSheet(OsmNode node) {
+    setState(() {
+      _selectedNodeId = node.id; // Track selected node for highlighting
+    });
+    
     final controller = _scaffoldKey.currentState!.showBottomSheet(
       (ctx) => MeasuredSheet(
         onHeightChanged: (height) {
@@ -175,11 +183,12 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
       ),
     );
     
-    // Reset height when sheet is dismissed (unless transitioning to edit)
+    // Reset height and selection when sheet is dismissed (unless transitioning to edit)
     controller.closed.then((_) {
       if (!_transitioningToEdit) {
         setState(() {
           _tagSheetHeight = 0.0;
+          _selectedNodeId = null; // Clear selection
         });
       }
       // If transitioning to edit, keep the height until edit sheet takes over
@@ -249,6 +258,7 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
               controller: _mapController,
               followMeMode: appState.followMeMode,
               sheetHeight: activeSheetHeight,
+              selectedNodeId: _selectedNodeId,
               onNodeTap: openNodeTagSheet,
               onUserGesture: () {
                 if (appState.followMeMode != FollowMeMode.off) {

lib/widgets/map/camera_markers.dart

@@ -95,22 +95,32 @@ class CameraMarkersBuilder {
     required List<OsmNode> cameras,
     required MapController mapController,
     LatLng? userLocation,
+    int? selectedNodeId,
     void Function(OsmNode)? onNodeTap,
   }) {
     final markers = <Marker>[
       // Camera markers
       ...cameras
         .where(_isValidCameraCoordinate)
-        .map((n) => Marker(
-          point: n.coord,
-          width: kCameraIconDiameter,
-          height: kCameraIconDiameter,
-          child: CameraMapMarker(
-            node: n, 
-            mapController: mapController,
-            onNodeTap: onNodeTap,
-          ),
-        )),
+        .map((n) {
+          // Check if this node should be highlighted (selected) or dimmed
+          final isSelected = selectedNodeId == n.id;
+          final shouldDim = selectedNodeId != null && !isSelected;
+          
+          return Marker(
+            point: n.coord,
+            width: kCameraIconDiameter,
+            height: kCameraIconDiameter,
+            child: Opacity(
+              opacity: shouldDim ? 0.5 : 1.0,
+              child: CameraMapMarker(
+                node: n, 
+                mapController: mapController,
+                onNodeTap: onNodeTap,
+              ),
+            ),
+          );
+        }),
       
       // User location marker
       if (userLocation != null)

lib/widgets/map_view.dart

@@ -35,12 +35,14 @@ class MapView extends StatefulWidget {
     required this.followMeMode,
     required this.onUserGesture,
     this.sheetHeight = 0.0,
+    this.selectedNodeId,
     this.onNodeTap,
   });
 
   final FollowMeMode followMeMode;
   final VoidCallback onUserGesture;
   final double sheetHeight;
+  final int? selectedNodeId;
   final void Function(OsmNode)? onNodeTap;
 
   @override
@@ -330,6 +332,7 @@ class MapViewState extends State<MapView> {
           cameras: cameras,
           mapController: _controller.mapController,
           userLocation: _gpsController.currentLocation,
+          selectedNodeId: widget.selectedNodeId,
           onNodeTap: widget.onNodeTap,
         );