Patch memory hole cleaner, and bounce version

build.gradle

@@ -11,8 +11,8 @@ android {
         applicationId "haus.nightmare.a3270"
         minSdk 24
         targetSdk 34
-        versionCode 9
-        versionName "1.2.4"
+        versionCode 10
+        versionName "1.3.0"
     }
 
     buildTypes {

src/main/AndroidManifest.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    android:versionCode="9"
-    android:versionName="1.2.4">
+    android:versionCode="10"
+    android:versionName="1.3.0">
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

src/main/java/haus/nightmare/a3270/TerminalViewModel.kt

@@ -94,8 +94,8 @@ class TerminalViewModel(application: Application) : AndroidViewModel(application
     private val inputExecutor = Executors.newSingleThreadExecutor()
     private val inputDispatcher = inputExecutor.asCoroutineDispatcher()
 
-    // Non-blocking FIFO input channel buffer
-    private val inputChannel = Channel<TerminalInputAction>(Channel.UNLIMITED)
+    // Bounded FIFO input channel buffer (prevents unbounded queue growth if worker blocks)
+    private val inputChannel = Channel<TerminalInputAction>(256)
 
     private val _connectionState = MutableStateFlow(ConnectionState.NOT_CONNECTED)
     val connectionState: StateFlow<ConnectionState> = _connectionState.asStateFlow()

src/main/java/haus/nightmare/a3270/ui/MacroDialog.kt

@@ -77,7 +77,12 @@ fun MacroDialog(
 
     fun appendLog(msg: String) {
         val line = "[${java.text.SimpleDateFormat("HH:mm:ss", java.util.Locale.US).format(java.util.Date())}] $msg\n"
-        executionLog += line
+        val combined = executionLog + line
+        executionLog = if (combined.length > 131072) {
+            combined.substring(combined.length - 131072)
+        } else {
+            combined
+        }
     }
 
     DisposableEffect(client) {

src/main/java/haus/nightmare/a3270/ui/TerminalView.kt

@@ -126,6 +126,15 @@ fun TerminalView(
         }
     }
 
+    val paint = remember {
+        Paint().apply {
+            isAntiAlias = true
+            typeface = Typeface.MONOSPACE
+            textAlign = Paint.Align.CENTER
+        }
+    }
+    var cachedGraphicsBitmap by remember { mutableStateOf<android.graphics.Bitmap?>(null) }
+
     Box(modifier = modifier.fillMaxSize()) {
         Canvas(
             modifier = Modifier
@@ -289,12 +298,6 @@ fun TerminalView(
             val offsetX = metrics.offsetX
             val offsetY = metrics.offsetY
 
-            val paint = Paint().apply {
-                isAntiAlias = true
-                typeface = Typeface.MONOSPACE
-                textAlign = Paint.Align.CENTER
-            }
-
             // Calculate optimal font size ensuring characters fit cleanly in cell without crowding
             val baseTextSize = cellHeight * 0.78f
             paint.textSize = baseTextSize
@@ -335,8 +338,13 @@ fun TerminalView(
                 val gWidth = graphicsPlane.canvasWidth
                 val gHeight = graphicsPlane.canvasHeight
                 val rgb = graphicsPlane.rgbBuffer
-                if (gridW > 0 && gridH > 0 && rgb != null && gWidth > 0 && gHeight > 0) {
-                    val bmp = android.graphics.Bitmap.createBitmap(rgb, gWidth, gHeight, android.graphics.Bitmap.Config.ARGB_8888)
+                if (gridW > 0 && gridH > 0 && rgb != null && gWidth > 0 && gHeight > 0 && rgb.size >= gWidth * gHeight) {
+                    var bmp = cachedGraphicsBitmap
+                    if (bmp == null || bmp.width != gWidth || bmp.height != gHeight || bmp.isRecycled) {
+                        bmp = android.graphics.Bitmap.createBitmap(gWidth, gHeight, android.graphics.Bitmap.Config.ARGB_8888)
+                        cachedGraphicsBitmap = bmp
+                    }
+                    bmp.setPixels(rgb, 0, gWidth, 0, 0, gWidth, gHeight)
                     drawContext.canvas.nativeCanvas.drawBitmap(
                         bmp,
                         null,