Pass through all extraneous tags on an existing node, always. Strip out special case for "existing tags" profile, replace with an empty temp profile so all can be treated the same.

lib/models/node_profile.dart

@@ -266,22 +266,14 @@ class NodeProfile {
   @override
   int get hashCode => id.hashCode;
 
-  /// Create a temporary profile representing the existing tags on a node (minus direction and operator)
+  /// Create a temporary empty profile for editing existing nodes
   /// Used as the default "<Existing tags>" option when editing nodes
+  /// All existing tags will flow through as additionalExistingTags
   static NodeProfile createExistingTagsProfile(OsmNode node) {
-    final tagsWithoutSpecial = Map<String, String>.from(node.tags);
-    // Remove direction tags (handled separately)
-    tagsWithoutSpecial.remove('direction');
-    tagsWithoutSpecial.remove('camera:direction');
-    
-    // Remove operator tags (handled separately by operator profile)
-    tagsWithoutSpecial.removeWhere((key, value) => 
-        key == 'operator' || key.startsWith('operator:'));
-    
     return NodeProfile(
-      id: 'temp-no-change-${node.id}',
+      id: 'temp-empty-${node.id}',
       name: '<Existing tags>', // Will be localized in UI
-      tags: tagsWithoutSpecial,
+      tags: {}, // Completely empty - all existing tags become additional
       builtin: false,
       requiresDirection: true,
       submittable: true,
@@ -289,7 +281,6 @@ class NodeProfile {
     );
   }
 
-  /// Returns true if this is a temporary "existing tags" profile
-  bool get isExistingTagsProfile => id.startsWith('temp-no-change-');
+
 }