Tapping an inventory item now opens its detail (the /variety/:id route was a
placeholder). Read + edit one variety end-to-end:
- Detail view: photo, category, "also known as" names, notes and lots, driven
by a reactive VarietyDetailCubit.
- Edit core fields (label/category/notes, LWW) via a bottom sheet.
- Add a lot (harvest year + quantity) — the list refreshes reactively.
- Soft-delete (tombstone) with a confirm dialog.
Repository:
- watchVariety(id): merges Drift table-change streams (variety, lots, names,
attachments) via StreamGroup and reloads the full detail on any change, so a
lot added to a *different* table still refreshes the view.
- updateVariety (LWW), addLot, softDeleteVariety.
i18n: detail/edit/addLot strings (ES/EN); switched slang to {param} braces
interpolation (translator- and Weblate-friendly).
Tests: repository (reactive watchVariety, update, soft-delete) and widget tests
(render, edit updates title, add-lot appears, delete shows not-found). Full
suite green: 23 passing, 1 skipped (SQLCipher-only encryption guard).