Restore hover behavior

Author: paulb777

ai/ai-react-app/src/components/Layout/LeftSidebar.module.css

@@ -39,6 +39,12 @@
   border-color: var(--color-surface-interactive);
 }
 
+.navButton.active:hover {
+  background-color: var(--color-surface-interactive-hover);
+  border-color: var(--color-surface-interactive-hover);
+}
+
+
 .backendSelector,
 .personaSelector {
   border-top: 1px solid var(--color-border-primary);