# Phase 003: Vehicle CRUD And Detail Page

## Goal
Build the main vehicle management interface.

## Work
- Add `VehiclesController`.
- Add routes for vehicle index, show, new, create, edit, update, and destroy.
- Build simple ERB views for vehicle CRUD.
- Make `vehicles#index` the root page.
- On `vehicles#show`, display vehicle details, maintenance schedules, fuel history, and maintenance history.
- Keep layout simple and mobile-friendly.

## Deliverables
- Vehicle CRUD UI.
- Vehicle request specs.
- Basic navigation.

## Acceptance Criteria
- Users can create, view, update, and delete vehicles.
- Vehicle show page is the main operational screen.
- Request specs cover successful and invalid create/update paths.