fix: show modem preset name if channel name is empty

(or "Default" if not available)

app/src/main/java/com/geeksville/mesh/ui/ChannelFragment.kt

@@ -126,6 +126,7 @@ fun ChannelScreen(viewModel: UIViewModel = viewModel()) {
 
     val primaryChannel = ChannelSet(channelSet).primaryChannel
     val channelUrl = ChannelSet(channelSet).getChannelUrl()
+    val modemPresetName = Channel(Channel.default.settings, channelSet.loraConfig).name
 
     val barcodeLauncher = rememberLauncherForActivityResult(ScanContract()) { result ->
         if (result.contents != null) {
@@ -244,6 +245,7 @@ fun ChannelScreen(viewModel: UIViewModel = viewModel()) {
             channelSettings = with(channelSet) {
                 if (settingsCount > index) getSettings(index) else channelSettings { }
             },
+            modemPresetName = modemPresetName,
             onAddClick = {
                 with(channelSet) {
                     if (settingsCount > index) channelSet = copy { settings[index] = it }
@@ -258,6 +260,7 @@ fun ChannelScreen(viewModel: UIViewModel = viewModel()) {
     var showChannelEditor by remember { mutableStateOf(false) }
     if (showChannelEditor) ChannelSettingsItemList(
         settingsList = channelSet.settingsList,
+        modemPresetName = modemPresetName,
         enabled = enabled,
         focusManager = focusManager,
         onNegativeClicked = {

app/src/main/java/com/geeksville/mesh/ui/components/config/ChannelSettingsItemList.kt

@@ -107,6 +107,7 @@ fun ChannelSettingsItemList(
 @Composable
 fun ChannelSettingsItemList(
     settingsList: List<ChannelSettings>,
+    modemPresetName: String = "Default",
     maxChannels: Int = 8,
     enabled: Boolean,
     focusManager: FocusManager,
@@ -125,6 +126,7 @@ fun ChannelSettingsItemList(
             channelSettings = with(settingsListInput) {
                 if (size > index) get(index) else channelSettings { }
             },
+            modemPresetName = modemPresetName,
             onAddClick = {
                 if (settingsListInput.size > index) settingsListInput[index] = it
                 else settingsListInput.add(it)
@@ -147,7 +149,7 @@ fun ChannelSettingsItemList(
             itemsIndexed(settingsListInput) { index, channel ->
                 ChannelCard(
                     index = index,
-                    title = channel.name,
+                    title = channel.name.ifEmpty { modemPresetName },
                     enabled = enabled,
                     onEditClick = { showEditChannelDialog = index },
                     onDeleteClick = { settingsListInput.removeAt(index) }

app/src/main/java/com/geeksville/mesh/ui/components/config/EditChannelDialog.kt

@@ -48,6 +48,7 @@ fun EditChannelDialog(
     onAddClick: (ChannelProtos.ChannelSettings) -> Unit,
     onDismissRequest: () -> Unit,
     modifier: Modifier = Modifier,
+    modemPresetName: String = "Default",
 ) {
     val base64Flags = Base64.URL_SAFE + Base64.NO_WRAP
     fun encodeToString(input: ByteString) =
@@ -73,9 +74,10 @@ fun EditChannelDialog(
         text = {
             AppCompatTheme {
                 Column(modifier.fillMaxWidth()) {
+                    var isFocused by remember { mutableStateOf(false) }
                     EditTextPreference(
                         title = stringResource(R.string.channel_name),
-                        value = nameInput,
+                        value = if (isFocused) nameInput else nameInput.ifEmpty { modemPresetName },
                         maxSize = 11, // name max_size:12
                         enabled = true,
                         isError = false,
@@ -84,6 +86,7 @@ fun EditChannelDialog(
                         ),
                         keyboardActions = KeyboardActions(onDone = { }),
                         onValueChanged = { nameInput = it },
+                        onFocusChanged = { isFocused = it.isFocused },
                     )
 
                     OutlinedTextField(