Prevent session selection when clicking delete wrapper

Stop click/keyboard propagation on the delete action wrapper in the
Independent Panel chat list. This avoids accidental session selection
when users click the whitespace around the delete icon, aligning with
review feedback about event propagation safety. No functional changes to
DeleteButton itself; this is an extra guard at the container level.

Validated via npm run lint and build; both pass.

Author: PeterDaveHello

src/pages/IndependentPanel/App.jsx

@@ -261,7 +261,18 @@ function App() {
                     }}
                   >
                     {session.sessionName}
-                    <span className="gpt-util-group">
+                    <span
+                      className="gpt-util-group"
+                      onClick={(e) => {
+                        e.stopPropagation()
+                      }}
+                      onKeyDown={(e) => {
+                        if (e.key === 'Enter' || e.key === ' ') {
+                          e.preventDefault()
+                          e.stopPropagation()
+                        }
+                      }}
+                    >
                       <DeleteButton
                         size={14}
                         text={t('Delete Conversation')}