Do not block keys when directed to a widget in an output cell

package.json

@@ -1,6 +1,6 @@
 {
   "name": "jupyterlab_hide_code",
-  "version": "4.0.0",
+  "version": "4.1.1",
   "description": "A button in JupyterLab to run the code cells and then to hide the code cells.",
   "keywords": [
     "jupyter",

src/index.ts

@@ -47,6 +47,13 @@ export class ButtonExtension
       if (!hidden) {
         return;
       }
+      // Let keys through when the event originates inside a cell's output
+      // area — ipywidgets and similar interactive outputs live there and
+      // may need keys for their own handlers.
+      const target = event.target as HTMLElement | null;
+      if (target && target.closest('.jp-OutputArea')) {
+        return;
+      }
       // Cell type: m, y, r, 1-6
       // Add/remove/reorder: a, b, d (dd), x, v, z, Shift+M
       const blockedKeys = [