Improve Android retrain start feedback

android/TradeBotMonitor/app/build.gradle.kts

@@ -10,7 +10,7 @@ android {
         applicationId = "xyz.kusoft.tradebotmonitor"
         minSdk = 26
         targetSdk = 36
-        versionCode = 11
-        versionName = "0.2.8"
+        versionCode = 12
+        versionName = "0.2.9"
     }
 }

android/TradeBotMonitor/app/src/main/java/xyz/kusoft/tradebotmonitor/MainActivity.kt

@@ -39,6 +39,7 @@ class MainActivity : Activity() {
     private var activeTab: String = "ai"
     private var palette: AppPalette = AppPalette.dark()
     private var trainingStatusSignature: String = ""
+    private var retrainRequestInFlight: Boolean = false
 
     private val refreshRunnable = object : Runnable {
         override fun run() {
@@ -643,14 +644,23 @@ class MainActivity : Activity() {
         LinearLayout(this).apply {
             val activeJob = coordination.optJSONObject("active_job")
             val latestJob = coordination.optJSONObject("latest_job")
-            val job = activeJob ?: latestJob
             orientation = LinearLayout.VERTICAL
             addView(text("Процесс переобучения", 12f, Typeface.NORMAL, palette.muted))
-            if (job == null) {
+            if (activeJob == null) {
                 val agentOnline = coordination.optBoolean("agent_online", false)
                 addView(keyValueLine("Состояние", if (agentOnline) "готов к запуску" else "ждет Windows-agent", if (agentOnline) palette.green else palette.amber).top(dp(8)))
+                if (latestJob != null) {
+                    val latestStatus = latestJob.optStringClean("status")
+                    val latestPhase = latestJob.optStringClean("phase")
+                    val latestMessage = latestJob.optStringClean("message")
+                    addView(keyValueLine("Последнее обучение", trainingJobLabel(latestStatus, latestPhase), trainingJobColor(latestStatus, latestPhase)).top(dp(8)))
+                    if (latestMessage.isNotBlank()) {
+                        addView(text(latestMessage.take(160), 12f, Typeface.NORMAL, palette.muted).top(dp(6)))
+                    }
+                }
                 return@apply
             }
+            val job = activeJob
             val status = job.optStringClean("status")
             val phase = job.optStringClean("phase")
             val progress = job.optInt("progress_percent", if (status == "completed") 100 else 0).coerceIn(0, 100)
@@ -674,7 +684,7 @@ class MainActivity : Activity() {
     private fun retrainSettingsBlock(retrain: JSONObject, backtest: JSONObject): View {
         val coordination = retrain.optJSONObject("coordination") ?: JSONObject()
         val activeJob = coordination.optJSONObject("active_job")
-        val isTrainingActive = activeJob?.optStringClean("status") in setOf("pending", "running")
+        val isTrainingActive = retrainRequestInFlight || (activeJob?.optStringClean("status") in setOf("pending", "running"))
         return LinearLayout(this).apply {
             orientation = LinearLayout.VERTICAL
             addView(trainingComputerPanel(retrain).top(dp(12)))
@@ -687,7 +697,7 @@ class MainActivity : Activity() {
             addView(keyValueLine("Replay сделок", replay.optInt("trades", 0).toString()).top(dp(4)))
             addView(keyValueLine("Replay PnL", signedMoney(replay.optDouble("net_pnl", 0.0)), colorForSigned(replay.optDouble("net_pnl", 0.0))).top(dp(4)))
             if (isTrainingActive) {
-                addView(disabledActionButton("Обучение уже идет").top(dp(10)))
+                addView(disabledActionButton(if (retrainRequestInFlight) "Отправляю команду" else "Обучение уже идет").top(dp(10)))
             } else {
                 addView(actionRow(
                     "Запустить сейчас" to {
@@ -1101,15 +1111,20 @@ class MainActivity : Activity() {
     }
 
     private fun triggerRetrainNow() {
+        if (retrainRequestInFlight) return
+        retrainRequestInFlight = true
+        render()
         executor.execute {
             try {
                 val message = TradeBotApi(prefs.apiBaseUrl, prefs.commandToken).requestRetrain()
                 mainHandler.post {
+                    retrainRequestInFlight = false
                     toast(message.take(180))
                     refreshData(silent = false)
                 }
             } catch (error: Exception) {
                 mainHandler.post {
+                    retrainRequestInFlight = false
                     toast(error.message ?: "retrain не запущен")
                     refreshData(silent = false)
                 }