fix(loyalty): translate category names in transaction history

Category names in transaction tables now resolve to the current
page language instead of always showing English. Updated:
- category_service.validate_category_for_store: accepts lang param,
  uses get_translated_name()
- Store transactions list route: passes request.state.language
- Card detail transactions route: passes request.state.language
- card_service.get_customer_transactions_with_store_names: accepts
  lang param for storefront route

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/loyalty/services/card_service.py

@@ -807,6 +807,7 @@ class CardService:
         *,
         skip: int = 0,
         limit: int = 20,
+        lang: str = "en",
     ) -> tuple[list[dict], int]:
         """
         Get transaction history for a card with store names resolved.
@@ -853,7 +854,7 @@ class CardService:
                 names = []
                 for cid in tx.category_ids:
                     name = category_service.validate_category_for_store(
-                        db, cid, tx.store_id or 0
+                        db, cid, tx.store_id or 0, lang=lang
                     )
                     if name:
                         names.append(name)