Nullable location handlers & theme color updates

Make Livewire locationDetected handlers tolerant of missing payloads by adding default null/empty values (GetCheckoutForm, GetQuoteForProductPage, GetQuoteForm, GetQuoteStepForm) to avoid errors when the event payload is incomplete. Update breadcrumb link colors in PageRenderer from orange (#E62A16) to a darker blue (#1A3263) for consistency. Adjust anchor colors in public/assets/css/main.css and the minified build (main.min.css) to new brand tones (#F2A65A / hover #FAB95B). Also include minor updates to Blade templates (header, footer, app layout, product-detail) that accompany these style and markup tweaks.
