Remove special "existing tags" profile case; existing tags profile now empty.

lib/models/node_profile.dart

@@ -270,6 +270,19 @@ class NodeProfile {
   /// Used as the default "<Existing tags>" option when editing nodes
   /// All existing tags will flow through as additionalExistingTags
   static NodeProfile createExistingTagsProfile(OsmNode node) {
+    // Calculate FOV from existing direction ranges if applicable
+    double? calculatedFov;
+    
+    // If node has direction/FOV pairs, check if they all have the same FOV
+    if (node.directionFovPairs.isNotEmpty) {
+      final firstFov = node.directionFovPairs.first.fovDegrees;
+      
+      // If all directions have the same FOV, use it for the profile
+      if (node.directionFovPairs.every((df) => df.fovDegrees == firstFov)) {
+        calculatedFov = firstFov;
+      }
+    }
+    
     return NodeProfile(
       id: 'temp-empty-${node.id}',
       name: '<Existing tags>', // Will be localized in UI
@@ -278,6 +291,7 @@ class NodeProfile {
       requiresDirection: true,
       submittable: true,
       editable: false,
+      fov: calculatedFov, // Use calculated FOV from existing direction ranges
     );
   }
 

lib/state/session_state.dart

@@ -319,9 +319,9 @@ class SessionState extends ChangeNotifier {
       
       dirty = true;
     }
-    // Only update operator profile if explicitly provided or different from current
-    if (operatorProfile != null && operatorProfile != _editSession!.operatorProfile) {
-      _editSession!.operatorProfile = operatorProfile;
+    // Only update operator profile if explicitly provided (including null) and different from current
+    if (operatorProfile != _editSession!.operatorProfile) {
+      _editSession!.operatorProfile = operatorProfile; // This can be null
       dirty = true;
     }
     if (target != null && target != _editSession!.target) {

lib/widgets/edit_node_sheet.dart

@@ -154,40 +154,28 @@ class _EditNodeSheetState extends State<EditNodeSheet> {
 
   /// Check if the edit session has any actual changes compared to the original node
   bool _hasActualChanges(EditNodeSession session) {
-    debugPrint('EditNodeSheet: Checking for actual changes...');
-    
     // Extract operation is always a change
-    if (session.extractFromWay) {
-      debugPrint('EditNodeSheet: Extract operation detected - changes found');
-      return true;
-    }
+    if (session.extractFromWay) return true;
     
     // Check location change
     const double tolerance = 0.0000001; // ~1cm precision
     if ((session.target.latitude - session.originalNode.coord.latitude).abs() > tolerance ||
         (session.target.longitude - session.originalNode.coord.longitude).abs() > tolerance) {
-      debugPrint('EditNodeSheet: Location change detected - changes found');
       return true;
     }
     
     // Check direction changes
     if (!_directionsEqual(session.directions, session.originalNode.directionDeg)) {
-      debugPrint('EditNodeSheet: Direction change detected - changes found');
       return true;
     }
     
-    // Check tag changes (including operator profile)
+    // Check tag changes (including operator profile and additional existing tags)
     final originalTags = session.originalNode.tags;
     final newTags = _getSessionCombinedTags(session);
-    debugPrint('EditNodeSheet: Original tags: $originalTags');
-    debugPrint('EditNodeSheet: New combined tags: $newTags');
-    
     if (!_tagsEqual(originalTags, newTags)) {
-      debugPrint('EditNodeSheet: Tag changes detected - changes found');
       return true;
     }
     
-    debugPrint('EditNodeSheet: No changes detected');
     return false;
   }
 
@@ -513,11 +501,6 @@ class _EditNodeSheetState extends State<EditNodeSheet> {
             ),
           );
           if (result != null) {
-            debugPrint('EditNodeSheet: Updating session from refine tags result');
-            debugPrint('EditNodeSheet: Profile: ${session.profile?.name}');
-            debugPrint('EditNodeSheet: AdditionalExistingTags: ${result.additionalExistingTags}');
-            debugPrint('EditNodeSheet: Current session additionalExistingTags: ${session.additionalExistingTags}');
-            
             appState.updateEditSession(
               operatorProfile: result.operatorProfile,
               refinedTags: result.refinedTags,

lib/widgets/refine_tags_sheet.dart

@@ -101,7 +101,6 @@ class _RefineTagsSheetState extends State<RefineTagsSheet> {
     // Use the additional existing tags calculated by SessionState when profile changed
     if (widget.currentAdditionalExistingTags != null) {
       _additionalExistingTags = widget.currentAdditionalExistingTags!.entries.toList();
-      debugPrint('RefineTagsSheet: Loaded ${_additionalExistingTags.length} additional existing tags from session');
       return;
     }
     
@@ -130,8 +129,6 @@ class _RefineTagsSheetState extends State<RefineTagsSheet> {
       // Include this tag as an additional existing tag
       _additionalExistingTags.add(MapEntry(key, value));
     }
-    
-    debugPrint('RefineTagsSheet: Fallback calculated ${_additionalExistingTags.length} additional existing tags');
   }
   
   /// Check if a tag should be skipped from additional existing tags
@@ -203,11 +200,6 @@ class _RefineTagsSheetState extends State<RefineTagsSheet> {
                   ? Map<String, String>.fromEntries(_additionalExistingTags.where((e) => e.key.isNotEmpty))
                   : null;
               
-              debugPrint('RefineTagsSheet: Returning result');
-              debugPrint('RefineTagsSheet: additionalTags: $additionalTags');
-              debugPrint('RefineTagsSheet: _additionalExistingTags: $_additionalExistingTags');
-              debugPrint('RefineTagsSheet: _shouldShowAdditionalExistingTags: $_shouldShowAdditionalExistingTags');
-              
               Navigator.pop(context, RefineTagsResult(
                 operatorProfile: _selectedOperatorProfile,
                 refinedTags: _refinedTags,