Canteen Management

Portal page at /charges, same visual treatment as Menu & pricing / Employee meals: StatCard KPI tiles, DomainFootnote banner, table. Today only (no date picker, no month export -- deferred, same call as before), no Tariff column (fabricated in the prototype from the ward code, no real field backs it). Post pending button -> POST /post-pending (task 2). Added to the Finance nav group (gated on the dietary capability, not shared -- same reasoning as the Ward meal sheet nav placement) and route-permissions.ts using the already-scaffolded canteen.charges.* keys.