fix

apps/api/internal/processing/pipeline.go

@@ -1564,7 +1564,8 @@ func (p *Pipeline) processOne(ctx context.Context, companyID, jobID uuid.UUID, i
 		engine = &Engine{Vector: NoopVectorCategorizer{}}
 	}
 	policy := cache.stepPolicy()
-	result, err := engine.RunSteps(ctx, companyID.String(), in, processingType, nil, policy)
+	catNames := categoryUniqueIDsList(categoryNamesByUID)
+	result, err := engine.RunSteps(ctx, companyID.String(), in, processingType, catNames, policy)
 	if err != nil {
 		return false, 0, StepResult{}, err
 	}
@@ -1644,6 +1645,13 @@ func (p *Pipeline) processOne(ctx context.Context, companyID, jobID uuid.UUID, i
 		WHERE id = $1 AND company_id = $2`, it.RawID, companyID); err != nil {
 		return false, 0, result, err
 	}
+	// Stick taxonomy unique_id onto mapped_data.category when still empty so the
+	// Products UI (reads mapped) and reprocess keep the AI/vector/mapped pick.
+	if cat := strings.TrimSpace(result.Category); cat != "" {
+		if _, err := tx.Exec(ctx, persistMappedCategorySQL, it.RawID, companyID, cat); err != nil {
+			return false, 0, result, fmt.Errorf("persist mapped category: %w", err)
+		}
+	}
 	if err := tx.Commit(ctx); err != nil {
 		return false, 0, result, err
 	}