feat(ECR-015): RedemptionCode 兑换码并 Closed

批次生成/作废、C 端兑码延长会员；admin-h5 /codes。
Loop continuous。Next：ECR-016 UserIntelligence。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/internal/repository/report_repo.go

@@ -316,38 +316,6 @@ func AskPackAmountCents(plan string) int {
 	}
 }
 
-// MembershipPlanAmountCents returns catalog price or fallback for membership plans.
-func (r *ReportRepo) MembershipPlanAmountCents(ctx context.Context, plan string) (int, error) {
-	var amount int
-	var active bool
-	err := r.Pool.QueryRow(ctx, `
-		SELECT amount_cents, active FROM membership_plans WHERE code=$1`, plan,
-	).Scan(&amount, &active)
-	if errors.Is(err, pgx.ErrNoRows) {
-		return membershipAmountFallback(plan), nil
-	}
-	if err != nil {
-		return 0, err
-	}
-	if !active {
-		return 0, errString("plan inactive")
-	}
-	return amount, nil
-}
-
-func membershipAmountFallback(plan string) int {
-	switch plan {
-	case "month":
-		return 2500
-	case "quarter":
-		return 6800
-	case "year":
-		return 19800
-	default:
-		return 2500
-	}
-}
-
 var errMissingReport = errString("report_id required for deep_access")
 
 type errString string