fix(web): prevent Focus exception after feedback submission and window restore (#359)

* Fix Focus exception in web

This hotfix addresses a Focus exception that occurs on the Web platform when a user submits feedback and then hides/restores the browser window. The issue stems from a focus context being accessed before it's properly attached.

* fix(keyboard): improve keyboard hiding logic with focus check

Refactored _hideKeyboard method to use FocusScope.of(context).unfocus() only when there's an active focus that is not the primary focus. This is more precise than calling requestFocus(FocusNode()), which can cause issues like:

Attaching a focus node without context may throw runtime exceptions.

It introduces unnecessary focus traversal, which may lead to unexpected behavior in complex focus trees.

unfocus() is a cleaner, Flutter-recommended way to dismiss the keyboard.

This approach safely checks focus state and dismisses the keyboard only when appropriate, avoiding crashes and unwanted side effects.

Author: Akimskate

feedback/lib/src/feedback_widget.dart

@@ -353,7 +353,11 @@ class FeedbackWidgetState extends State<FeedbackWidget>
   }
 
   static void _hideKeyboard(BuildContext context) {
-    FocusScope.of(context).requestFocus(FocusNode());
+    final currentFocus = FocusScope.of(context);
+
+    if (!currentFocus.hasPrimaryFocus && currentFocus.focusedChild != null) {
+      currentFocus.unfocus();
+    }
   }
 }