Adds model, repo, controller, and request classes for Vehicle and Convoy.
Registers routes for vehicles and convoys, updates client store.
Adds front‑end files to list, add, edit vehicles.
Cleans up console logging from client store.
Add price list management across the API, store, services, routes,
navigation, and sales views.
Support quotes for either a client or a client group, including PDF
download and nullable client validation for group-based recipients.
Extend client groups to manage assigned clients directly from the form
and detail views, and refresh supplier, intervention, stock, and order
screens with updated interactions and layouts.
