fix(CodeEditor): prevent focus loss (#12211)

Remove `&& !value` from outer conditional rendering to prevent Monaco
editor from unmounting when code transitions from empty to non-empty.

Author: ochosi

packages/react-code-editor/src/components/CodeEditor/CodeEditor.tsx

@@ -596,7 +596,8 @@ export const CodeEditor = ({
             )}
             ref={ref}
           >
-            {(isUploadEnabled || emptyState) && !value ? (
+            {(isUploadEnabled || emptyState) ? (
+              /* Upload/EmptyState enabled: wrap in Dropzone container */
               <div
                 {...getRootProps({
                   onClick: (event) => event.stopPropagation() // Prevents clicking TextArea from opening file dialog
@@ -619,15 +620,16 @@ export const CodeEditor = ({
                 </div>
               </div>
             ) : (
-              <>
+              /* No upload/emptyState: use consistent container structure */
+              <div className={css(styles.codeEditorContainer)}>
                 {editorHeader}
                 {showEditor && (
                   <div className={css(styles.codeEditorMain)}>
                     {hiddenFileInput}
                     {editor}
                   </div>
                 )}
-              </>
+              </div>
             )}
           </div>
         );