src/core/utils/vehicleDisplay.ts — shared vehicle display helpers: getVehicleLabel() (display name with fallback chain) and getVehicleSubtitle() (Year Make Model formatting).
src/shared-minimal/* — shared UI components and theme.
Mobile + Desktop (required)
Layouts responsive by default; validate on small/large viewports.
Verify Suspense fallbacks and navigation flows on both form factors.
Test key screens: Vehicles, Fuel Logs, Documents, Settings.
Ensure touch interactions and keyboard navigation work equivalently.