Introduce a global app banners store (GUI/src/stores/appBanners.ts) and switch authentication error/notification flows to use it. GUI/src/Layout.vue now consumes the banner store, replaces the single snackbar with a stacked, dismissible banner UI (styles, transitions and z-index included), and adds navigateToBrandTarget() to route the brand button based on auth state. GUI/src/routes/authentication/Login.vue was updated to push errors to the new banner store and remove the local alert. Minor route adjustments in GUI/src/plugins/routesLayout.ts: rename 'Dash' to 'Dashboard' and change Login visibility to Unauthenticated. codexInfo.md updated to document these UI/behavior changes.
Jonas