fix: get_user_quota 返回 was_paid 字段

src/handlers/payment.rs

@@ -1071,7 +1071,7 @@ pub async fn get_user_quota(
 
     let is_maintenance = std::env::var("PAYMENT_MAINTENANCE_MODE").ok() == Some("true".to_string());
 
-    let (used, is_paid_active, paid_expires_at) =
+    let (used, is_paid_active, paid_expires_at, was_paid) =
         db::get_user_quota(pool.get_ref(), user_id).await?;
 
     // 维护模式使用更高的临时限额，但非会员仍然有限制防止滥用
@@ -1097,6 +1097,7 @@ pub async fn get_user_quota(
             "unlimited": unlimited,
             "is_paid_active": active,
             "paid_expires_at": paid_expires_at,
+            "was_paid": was_paid,
             "maintenance_mode": is_maintenance,
         }
     })))