fix: 维护模式使用500条临时限额而非完全跳过(防滥用)

src/handlers/payment.rs

@@ -1073,17 +1073,22 @@ pub async fn get_user_quota(
 
     let (used, is_paid_active, paid_expires_at) =
         db::get_user_quota(pool.get_ref(), user_id).await?;
-    let limit: i64 = std::env::var("FREE_USER_DATA_LIMIT")
-        .ok()
-        .and_then(|v| v.parse().ok())
-        .unwrap_or(20);
 
-    let (unlimited, active) = if is_maintenance {
-        (true, true)
+    // 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
+    let (limit, unlimited) = if is_maintenance && !is_paid_active {
+        let ml: i64 = std::env::var("MAINTENANCE_MODE_DATA_LIMIT")
+            .ok().and_then(|v| v.parse().ok()).unwrap_or(500);
+        (ml, false)
+    } else if is_paid_active {
+        (0, true)
     } else {
-        (is_paid_active, is_paid_active)
+        let fl: i64 = std::env::var("FREE_USER_DATA_LIMIT")
+            .ok().and_then(|v| v.parse().ok()).unwrap_or(20);
+        (fl, false)
     };
 
+    let active = if is_maintenance { true } else { is_paid_active };
+
     Ok(HttpResponse::Ok().json(serde_json::json!({
         "success": true,
         "data": {