The transaction-history table on the card-detail page rendered a
Category column only on the store frontend. Merchant and admin saw
five columns instead of six, even though the merchant report
prompted the audit (rewardflow.lu/merchants/loyalty/cards/6 vs
fashionhub.rewardflow.lu/store/.../cards/6).
Root cause was two layers:
- API: only store's GET /cards/{id}/transactions enriched
tx.category_names from tx.category_ids; merchant's and admin's
endpoints returned raw rows with category_names=null.
- Template: the shared partial's show_category_column flag was set
to true only on the store wrapper.
Backfill the same `category_service.validate_category_for_store`
lookup loop into merchant.py::get_card_transactions and
admin.py::get_merchant_card_transactions, accepting Request to read
request.state.language for localised category names. Add
`{% set show_category_column = true %}` to the merchant and admin
card-detail wrappers.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>