Remove empty terminal black areas

- Hide the terminal output viewport when there are no output lines on a newly loaded level.
- Reduce the minimum output history height so short output does not create a large empty black panel.
- Use the pane surface color for the app background so normal spacing between cards is not black.

app/build.gradle.kts

@@ -19,8 +19,8 @@ android {
         applicationId = "solutions.tretter.githugandroid"
         minSdk = 26
         targetSdk = 35
-        versionCode = 140
-        versionName = "0.1.139"
+        versionCode = 141
+        versionName = "0.1.140"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true

app/src/main/java/solutions/tretter/githugandroid/GitHugTheme.kt

@@ -3,10 +3,10 @@ package solutions.tretter.githugandroid
 import androidx.compose.material3.darkColorScheme
 import androidx.compose.ui.graphics.Color
 
-val AppBackground = Color(0xFF000000)
 val PanelPrimary = Color(0xFF121212)
 val PanelSecondary = Color(0xFF1E1E1E)
 val PanelTertiary = Color(0xFF262626)
+val AppBackground = PanelSecondary
 val TerminalBackground = Color(0xFF050505)
 val TextPrimary = Color(0xFFFFFFFF)
 val TextSecondary = Color(0xFFE6E6E6)

app/src/main/java/solutions/tretter/githugandroid/Terminal.kt

@@ -82,7 +82,11 @@ fun TerminalPane(
     val reservedControlsHeight = 86.dp
     val maxOutputHeight = (terminalPaneMaxHeight - reservedControlsHeight).coerceAtLeast(120.dp)
     val outputLineHeight = 20.dp
-    val desiredOutputHeight = (output.size.coerceAtLeast(6) * outputLineHeight.value).dp.coerceAtMost(maxOutputHeight)
+    val hasOutput = output.isNotEmpty()
+    val desiredOutputHeight = (output.size.coerceAtLeast(1) * outputLineHeight.value)
+        .dp
+        .coerceAtLeast(48.dp)
+        .coerceAtMost(maxOutputHeight)
 
     LaunchedEffect(inputFieldVersion) {
         outputHorizontalScroll.scrollTo(0)
@@ -120,9 +124,10 @@ fun TerminalPane(
                 .widthIn(min = terminalMinWidth),
             verticalArrangement = Arrangement.spacedBy(8.dp),
         ) {
+            if (hasOutput) {
                 Box(
                     modifier = Modifier
-                    .heightIn(min = 200.dp, max = maxOutputHeight)
+                        .heightIn(max = maxOutputHeight)
                         .height(desiredOutputHeight)
                         .fillMaxWidth()
                         .background(PanelPrimary, RoundedCornerShape(10.dp))
@@ -146,6 +151,7 @@ fun TerminalPane(
                         }
                     }
                 }
+            }
             SpecialKeyBar(
                 onTab = onTab,
                 onHelp = onHelp,