refactor(mycard): harden request flow and connection resilience

Assets/SibylSystem/MyCard/MyCard.cs

 using UnityEngine;
-using System;
 using System.Collections;
-using System.Collections.Generic;
-using System.IO;
 using System.Threading;
 
 public class MyCard : WindowServantSP
 {
     public bool isMatching = false;
     public bool isRequesting = false;
-    //const string mycardTiramisuAddress = "tiramisu.mycard.moe";
-    //const string mycardTiramisuAthleticPort = "8911";
-    //const string mycardTiramisuEntertainPort = "7911";
 
-    private Coroutine requestCoroutine = null;  
+    private Coroutine requestCoroutine = null;
+    private Thread joinThread = null;
     MyCardHelper mycardHelper;
     UIInput inputUsername;
     UIInput inputPsw;
@@ -48,10 +43,19 @@ public class MyCard : WindowServantSP
 
     public void TerminateRequest()
     {
+        if (mycardHelper != null)
+        {
+            mycardHelper.CancelCurrentRequest();
+        }
+
         if (requestCoroutine != null)
         {
             Program.I().StopCoroutine(requestCoroutine);
             requestCoroutine = null;
+        }
+
+        if (isRequesting)
+        {
             isRequesting = false;
             Program.PrintToChat(InterString.Get("匹配已中断。"));
         }
@@ -80,56 +84,102 @@ public class MyCard : WindowServantSP
         Application.OpenURL("https://ygobbs.com/");
     }
 
-    IEnumerator MatchCoroutine(string username, string password, string matchType) {
-        isRequesting = true;
-        Program.PrintToChat(InterString.Get("正在登录至 MyCard。"));
-        bool loginSuccess = false;
-        string failReason = "";
-        // 启动并等待登录协程完成
-        yield return Program.I().StartCoroutine(mycardHelper.Login(username, password, (success, reason) => {
-            loginSuccess = success;
-            failReason = reason;
-        }));
-        if (!loginSuccess) {
-            Program.PrintToChat(InterString.Get("MyCard 登录失败。原因: ") + failReason);
-            isRequesting = false;
-            yield break; // 结束协程
+    bool TryStartJoinThread(MatchResultObject matchResultObject)
+    {
+        if (matchResultObject == null)
+        {
+            return false;
         }
-        Program.PrintToChat(InterString.Get("MyCard 登录成功，用户名: ") + mycardHelper.username);
-        // Program.PrintToChat(InterString.Get("正在获取匹配秘钥。"));
-        yield return Program.I().StartCoroutine(mycardHelper.GetUserU16Secret((success, reason) =>
+
+        if (joinThread != null && joinThread.IsAlive)
         {
-            loginSuccess = success;
-            failReason = reason;
-        }));
-        if (!loginSuccess)
+            return false;
+        }
+
+        string address = matchResultObject.address;
+        string userName = mycardHelper.username;
+        string port = matchResultObject.port.ToString();
+        string roomPassword = matchResultObject.password;
+        string version = "0x" + string.Format("{0:X}", Config.ClientVersion);
+
+        joinThread = new Thread(() =>
         {
-            Program.PrintToChat(InterString.Get("获取用户密钥失败。请重新登录。原因: ") + failReason);
-            isRequesting = false;
-            yield break; // 结束协程
+            TcpHelper.join(address, userName, port, roomPassword, version);
+        });
+        joinThread.Name = "MyCardJoinThread";
+        joinThread.IsBackground = true;
+        joinThread.Start();
+
+        return true;
+    }
+
+    IEnumerator MatchCoroutine(string username, string password, string matchType)
+    {
+        isRequesting = true;
+
+        try
+        {
+            Program.PrintToChat(InterString.Get("正在登录至 MyCard。"));
+            bool loginSuccess = false;
+            string failReason = "";
+
+            yield return Program.I().StartCoroutine(mycardHelper.Login(username, password, (success, reason) =>
+            {
+                loginSuccess = success;
+                failReason = reason;
+            }));
+
+            if (!loginSuccess)
+            {
+                Program.PrintToChat(InterString.Get("MyCard 登录失败。原因: ") + failReason);
+                yield break;
+            }
+
+            Program.PrintToChat(InterString.Get("MyCard 登录成功，用户名: ") + mycardHelper.username);
+
+            yield return Program.I().StartCoroutine(mycardHelper.GetUserU16Secret((success, reason) =>
+            {
+                loginSuccess = success;
+                failReason = reason;
+            }));
+
+            if (!loginSuccess)
+            {
+                Program.PrintToChat(InterString.Get("获取用户密钥失败。请重新登录。原因: ") + failReason);
+                yield break;
+            }
+
+            Program.PrintToChat(InterString.Get("正在请求匹配。匹配类型: ") + matchType);
+            MatchResultObject matchResultObject = null;
+
+            yield return Program.I().StartCoroutine(mycardHelper.RequestMatch(matchType, (result, reason) =>
+            {
+                matchResultObject = result;
+                failReason = reason;
+            }));
+
+            if (matchResultObject == null)
+            {
+                Program.PrintToChat(InterString.Get("匹配请求失败。原因: ") + failReason);
+                yield break;
+            }
+
+            if (!TryStartJoinThread(matchResultObject))
+            {
+                Program.PrintToChat(InterString.Get("连接任务已存在，请稍后再试。"));
+                yield break;
+            }
+
+            Program.PrintToChat(InterString.Get("匹配成功。正在进入房间。"));
+            isMatching = true;
         }
-        // Program.PrintToChat(InterString.Get("获取匹配秘钥成功。"));
-        Program.PrintToChat(InterString.Get("正在请求匹配。匹配类型: ") + matchType);
-        MatchResultObject matchResultObject = null;
-        // 启动并等待匹配协程完成
-        yield return Program.I().StartCoroutine(mycardHelper.RequestMatch(matchType, (result, reason) => {
-            matchResultObject = result;
-            failReason = reason;
-        }));
-        if (matchResultObject == null) { 
-            Program.PrintToChat(InterString.Get("匹配请求失败。原因: ") + failReason);
+        finally
+        {
             isRequesting = false;
-            yield break;
+            requestCoroutine = null;
         }
-        Program.PrintToChat(InterString.Get("匹配成功。正在进入房间。"));
-        this.isMatching = true;
-        // TcpHelper.join 内部自己创建并管理线程，这里直接调用是安全的
-        // 只要 TcpHelper.join 本身及其后续操作不调用 Unity API
-        (new Thread(() => { TcpHelper.join(matchResultObject.address, mycardHelper.username, matchResultObject.port.ToString(), matchResultObject.password, "0x" + String.Format("{0:X}", Config.ClientVersion)); })).Start();
-        
-        isRequesting = false;
-        requestCoroutine = null;
     }
+
     void StartMatch(string matchType)
     {
         string username = inputUsername.value;
@@ -143,16 +193,20 @@ public class MyCard : WindowServantSP
         {
             TerminateRequest();
         }
+
         SaveUser();
         Program.PrintToChat(InterString.Get("已开始匹配。"));
-        // 启动协程，而不是线程
+        mycardHelper.ResetCancellation();
         requestCoroutine = Program.I().StartCoroutine(MatchCoroutine(username, password, matchType));
     }
-    
-    void onClickJoinAthletic() {
+
+    void onClickJoinAthletic()
+    {
         StartMatch("athletic");
     }
-    void onClickJoinEntertain() { 
+
+    void onClickJoinEntertain()
+    {
         StartMatch("entertain");
     }
 }