fix(android): 修复keygen进度显示和参与者列表不完整的问题

问题1: 进度显示问题
- 协议进度永远卡在0/9直到完成
- 原因: 进度只在发送出站消息时更新，接收消息时不更新
- 修复: 在SendIncomingMessage中也提取轮次并调用OnProgress

问题2: totalRounds硬编码
- UI硬编码totalRounds=9，但keygen只有4轮
- 修复: 使用Go库传来的动态totalRounds值
- keygen默认4轮，sign默认9轮

问题3: 参与者列表不完整
- 只显示"参与方 1"，缺少其他参与者
- 原因: 参与者通过participant_joined事件逐个添加
- 后加入者不会收到之前参与者的事件
- 修复: 在session_started时根据thresholdN/T初始化完整列表

修改文件:
- tsslib.go: SendIncomingMessage添加进度回调
- MainViewModel.kt: 添加_totalRounds, 初始化完整参与者列表
- MainActivity.kt: 使用动态totalRounds

注意: 需要重新编译tsslib.aar才能生效

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/mpc-system/services/service-party-android/app/src/main/java/com/durian/tssparty/MainActivity.kt

@@ -77,6 +77,7 @@ fun TssPartyApp(
     val currentSessionId by viewModel.currentSessionId.collectAsState()
     val sessionParticipants by viewModel.sessionParticipants.collectAsState()
     val currentRound by viewModel.currentRound.collectAsState()
+    val totalRounds by viewModel.totalRounds.collectAsState()
     val publicKey by viewModel.publicKey.collectAsState()
     val hasEnteredSession by viewModel.hasEnteredSession.collectAsState()
 
@@ -349,7 +350,7 @@ fun TssPartyApp(
                         sessionStatus = sessionStatus,
                         participants = signParticipants,
                         currentRound = signCurrentRound,
-                        totalRounds = 9,
+                        totalRounds = if (totalRounds > 0) totalRounds else 9, // Default to sign rounds
                         preparedTx = preparedTx,
                         signSessionId = signSessionId,
                         inviteCode = signInviteCode,
@@ -435,7 +436,7 @@ fun TssPartyApp(
                     hasEnteredSession = hasEnteredSession,
                     participants = sessionParticipants,
                     currentRound = currentRound,
-                    totalRounds = 9,
+                    totalRounds = if (totalRounds > 0) totalRounds else 4, // Default to keygen rounds
                     publicKey = publicKey,
                     countdownSeconds = uiState.countdownSeconds,
                     onCreateSession = { name, t, n, participantName ->
@@ -486,7 +487,7 @@ fun TssPartyApp(
                     sessionInfo = screenSessionInfo,
                     participants = joinKeygenParticipants,
                     currentRound = joinKeygenRound,
-                    totalRounds = 9,
+                    totalRounds = if (totalRounds > 0) totalRounds else 4, // Default to keygen rounds
                     publicKey = joinKeygenPublicKey,
                     countdownSeconds = uiState.countdownSeconds,
                     onValidateInviteCode = { inviteCode ->
@@ -542,7 +543,7 @@ fun TssPartyApp(
                     signSessionInfo = screenSignSessionInfo,
                     participants = coSignParticipants,
                     currentRound = coSignRound,
-                    totalRounds = 9,
+                    totalRounds = if (totalRounds > 0) totalRounds else 9, // Default to sign rounds
                     signature = coSignSignature,
                     countdownSeconds = uiState.countdownSeconds,
                     onValidateInviteCode = { inviteCode ->

backend/mpc-system/services/service-party-android/app/src/main/java/com/durian/tssparty/presentation/viewmodel/MainViewModel.kt

@@ -218,6 +218,9 @@ class MainViewModel @Inject constructor(
     private val _currentRound = MutableStateFlow(0)
     val currentRound: StateFlow<Int> = _currentRound.asStateFlow()
 
+    private val _totalRounds = MutableStateFlow(0)
+    val totalRounds: StateFlow<Int> = _totalRounds.asStateFlow()
+
     private val _publicKey = MutableStateFlow<String?>(null)
     val publicKey: StateFlow<String?> = _publicKey.asStateFlow()
 
@@ -299,8 +302,10 @@ class MainViewModel @Inject constructor(
         }
 
         // Setup progress callback for real-time round updates from native TSS bridge
-        repository.setProgressCallback { round, totalRounds ->
+        repository.setProgressCallback { round, totalRoundsFromGo ->
-            android.util.Log.d("MainViewModel", "Progress update: $round / $totalRounds")
+            android.util.Log.d("MainViewModel", "Progress update: $round / $totalRoundsFromGo")
+            // Update totalRounds from Go library (keygen=4, sign=9)
+            _totalRounds.value = totalRoundsFromGo
             // Update the appropriate round state based on which session type is active
             when {
                 // Initiator keygen (CreateWallet)
@@ -338,6 +343,8 @@ class MainViewModel @Inject constructor(
                     val currentSessionId = _currentSessionId.value
                     if (currentSessionId != null && event.sessionId == currentSessionId) {
                         android.util.Log.d("MainViewModel", "Session started event for keygen initiator, triggering keygen")
+                        // Initialize participant list with all N parties (keygen requires all parties)
+                        _sessionParticipants.value = (1..event.thresholdN).map { "参与方 $it" }
                         viewModelScope.launch {
                             startKeygenAsInitiator(
                                 sessionId = currentSessionId,
@@ -359,6 +366,8 @@ class MainViewModel @Inject constructor(
                     val joinSignInfo = pendingJoinSignInfo
                     if (joinSignInfo != null && event.sessionId == joinSignInfo.sessionId) {
                         android.util.Log.d("MainViewModel", "Session started event for sign joiner, triggering sign")
+                        // Initialize participant list with T parties (sign requires T parties)
+                        _coSignParticipants.value = (1..event.thresholdT).map { "参与方 $it" }
                         startSignAsJoiner()
                     }
 
@@ -367,6 +376,8 @@ class MainViewModel @Inject constructor(
                     android.util.Log.d("MainViewModel", "Checking for sign initiator: signSessionId=$signSessionId, eventSessionId=${event.sessionId}")
                     if (signSessionId != null && event.sessionId == signSessionId) {
                         android.util.Log.d("MainViewModel", "Session started event for sign initiator, triggering sign")
+                        // Initialize participant list with T parties (sign requires T parties)
+                        _signParticipants.value = (1..event.thresholdT).map { "参与方 $it" }
                         startSignAsInitiator(event.selectedParties)
                     } else {
                         android.util.Log.d("MainViewModel", "NOT triggering sign initiator: signSessionId=$signSessionId, pendingSignInitiatorInfo=${pendingSignInitiatorInfo?.sessionId}")
@@ -515,6 +526,7 @@ class MainViewModel @Inject constructor(
         _currentSessionId.value = null
         _sessionParticipants.value = emptyList()
         _currentRound.value = 0
+        _totalRounds.value = 0
         _publicKey.value = null
         _createdInviteCode.value = null
         _hasEnteredSession.value = false
@@ -659,7 +671,11 @@ class MainViewModel @Inject constructor(
         viewModelScope.launch {
             _uiState.update { it.copy(isLoading = true, error = null) }
 
-            android.util.Log.d("MainViewModel", "Starting keygen as joiner: sessionId=${joinInfo.sessionId}, partyIndex=${joinInfo.partyIndex}")
+            // Initialize participant list with all N parties (keygen requires all parties)
+            // This ensures UI shows correct participant count even if we missed some participant_joined events
+            _joinKeygenParticipants.value = (1..joinInfo.thresholdN).map { "参与方 $it" }
+
+            android.util.Log.d("MainViewModel", "Starting keygen as joiner: sessionId=${joinInfo.sessionId}, partyIndex=${joinInfo.partyIndex}, thresholdN=${joinInfo.thresholdN}")
 
             val result = repository.executeKeygenAsJoiner(
                 sessionId = joinInfo.sessionId,

backend/mpc-system/services/service-party-android/tsslib/tsslib.go

@@ -393,6 +393,17 @@ func SendIncomingMessage(fromPartyIndex int, isBroadcast bool, payloadBase64 str
 		return fmt.Errorf("failed to parse message: %w", err)
 	}
 
+	// Extract round from incoming message and update progress
+	// This ensures progress updates on both sending and receiving messages
+	totalRounds := 4 // GG20 keygen has 4 rounds
+	if !session.isKeygen {
+		totalRounds = 9 // GG20 signing has 9 rounds
+	}
+	currentRound := extractRoundFromMessageType(parsedMsg.Type())
+	if currentRound > 0 {
+		session.callback.OnProgress(currentRound, totalRounds)
+	}
+
 	go func() {
 		_, err := session.localParty.Update(parsedMsg)
 		if err != nil {