fix(sidebar): remove title attribute from NavLink to fix [object Object] tooltip

The collapsed sidebar was showing '[object Object]' on hover because the
HTML title attribute received a JSX element (ProCanvas uses a JSX label
with styled spans). Removed the native title attribute — the custom
tooltip div already handles collapsed-state label display correctly.

src/components/Layout.jsx

@@ -17,7 +17,6 @@ const SidebarItem = ({ to, icon: Icon, label, isCollapsed, onClick }) => {
         <NavLink
             to={to}
             onClick={onClick}
-            title={isCollapsed ? label : ""}
             className={({ isActive }) =>
                 `
                 group relative flex items-center px-3 py-3 rounded-xl mb-1