fix: 恢复抖音过期支付并完善原生状态确认

uni_modules/tb-douyin-pay/utssdk/app-ios/TbDouyinPayNative.swift

@@ -12,6 +12,13 @@ public class TbDouyinPayNative {
 
     public static func available() -> Bool { DypayAPI.canOpenDypay() }
 
+    public static func resetPending() {
+        DispatchQueue.main.async {
+            generation = UUID()
+            pending = nil
+        }
+    }
+
     public static func pay(_ payload: String, _ done: @escaping (String) -> Void) {
         DispatchQueue.main.async {
             guard pending == nil else {
@@ -34,8 +41,8 @@ public class TbDouyinPayNative {
             DypayAPI.openDypay(withInfo: info, from: controller) { result in
                 finish(result as? [AnyHashable: Any], ticket)
             }
-            // Keep a native lock after timeout: a late URL callback cannot identify a new order.
-            // The host must query the pending order rather than immediately initiate another pay.
+            // Only authenticated server reconciliation can release a missing callback's lock.
+            // URL callbacks are hints, never payment success; the host always queries its saved order.
         }
     }