Add newline after WordNet definition to ensure proper closing block format

- Add newline after definition text when inserting into existing description block
- Update cursor position calculation to account for the extra newline
- This ensures the closing backticks appear on a new line as required

Before: definition text

Author: gnowgi

nodebook-base/frontend/src/CNLEditorComponent.tsx

@@ -625,8 +625,8 @@ export function CNLEditor({
           console.log('Inserting after line:', descriptionLineMatch[0]);
 
           view.dispatch({
-            changes: { from: insertPos, to: insertPos, insert: definition },
-            selection: EditorSelection.single(insertPos + definition.length, insertPos + definition.length)
+            changes: { from: insertPos, to: insertPos, insert: definition + '\n' },
+            selection: EditorSelection.single(insertPos + definition.length + 1, insertPos + definition.length + 1)
           });
         } else {
           // Create new description block

nodebook-base/frontend/src/CollaborativeCNLEditor.tsx

@@ -541,8 +541,8 @@ export function CollaborativeCNLEditor({
           console.log('Inserting after line:', descriptionLineMatch[0]);
 
           view.dispatch({
-            changes: { from: insertPos, to: insertPos, insert: definition },
-            selection: EditorSelection.single(insertPos + definition.length, insertPos + definition.length)
+            changes: { from: insertPos, to: insertPos, insert: definition + '\n' },
+            selection: EditorSelection.single(insertPos + definition.length + 1, insertPos + definition.length + 1)
           });
         } else {
           // Create new description block