feat(workspace): add resizable markdown editor/preview split with draggable handle and markdown outlet styling/demo

ts_web/elements/00group-workspace/dees-workspace/typescript-intellisense.ts

@@ -378,7 +378,10 @@ export class TypeScriptIntelliSenseManager {
     const existingModel = this.monacoInstance.editor.getModel(uri);
 
     if (existingModel) {
-      existingModel.setValue(content);
+      // Only update if content actually changed (prevents cursor reset)
+      if (existingModel.getValue() !== content) {
+        existingModel.setValue(content);
+      }
     } else {
       const language = this.getLanguageFromPath(path);
       this.monacoInstance.editor.createModel(content, language, uri);