- New article page /products/[id]: remaining stock summed over all
production batches (or bottlings for honey), each batch linked to its
own page for withdrawals and counts; "Bestand ansehen" in the list.
- Production batches can be corrected (lot number, date, quantity,
best-before date, note) via PATCH; the article stays fixed.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>