refactor(cw)!: replace legacy CW engine with DeepCW in both entry points

DeepCW 成为唯一 CW 解码内核, 不保留旧引擎作兜底 (用户决定: 完全移植)。

删除旧内核 (1298 行):
- CwDecoder.kt / CwBayesianDecoder.kt / CwChannelTracker.kt / CwSpectrogram.kt
- CwDsp / CwFFT / CwSTFFT / CwGoertzel / CwFilter / CwResampler.kt
- CwDecoderTest.kt
旧内核的自动定频与 squelch 门控由 DeepCW 的 400-1200Hz 固定频窗替代 ——
模型自带定频, 不再需要频谱峰值跟踪和噪声门。

两个 CW 入口都改接 DeepCW:
1. feature:cw 独立整页 CwDecodeScreen.kt 重写为纯 Compose (瀑布图 -> 实时行
   -> 历史区), 移除 AndroidView/LayoutInflater 和被删的 activity_main 布局;
   删除 CwSettingsDialog.kt (旧引擎的手动音调/带宽面板, DeepCW 全自动无需)
2. feature:radar 内嵌可折叠面板改走 ViewModel 的 CW state/action, 移除
   Morse Expert 控制器与 cw_panel_main 布局
   (该面板此前注释写明 "no longer feeds it", ViewModel 里的 CW 通路是死代码)

新增 CwWaterfall.kt: 复用 CwDeepSpectrogram 绘制瀑布图, 显示的正是模型
分析的 400-1200Hz 频段与同一批幅值。

接口接线:
- IMainContainer.provideCwDecoder() 提供 ICwDecoder (实现需 Context 读 assets)
- RadarViewModel 构造新增 cwDecoderFactory, onCleared() 中 close() 释放
  OrtSession 避免原生内存泄漏
- 删除已无调用方的 RadarAction.CwSetToneFreq (DeepCW 定频固定, 无参数可调);
  CwSubState.cwToneFreq 语义改为只读显示检测到的音调

依赖清理:
- feature:radar 不再依赖 feature:cw 与 constraintlayout
- feature:cw 不再依赖 constraintlayout

字符串: feature:cw 清理 Morse Expert 遗留串 (premium/rate/help/
tap_back_again_to_close/purple_500), 按 en/zh/tr/in/id 五语补全新串;
core:presentation 补 radar_cw_tone / radar_cw_waiting 五语。

验证:
./gradlew :core:domain:test => 4 个测试类全绿
./gradlew :feature:cw:compileDebugKotlin => BUILD SUCCESSFUL
./gradlew :feature:radar:compileDebugKotlin => BUILD SUCCESSFUL
./gradlew :core:data:compileDebugKotlin => BUILD SUCCESSFUL

feature/cw/src/main/java/com/rtbishop/look4sat/feature/cw/CwDecodeScreen.kt

@@ -1,29 +1,28 @@
 /*
- * CwDecodeScreen.kt - Look4Sat CW decode page (Compose shell).
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
  *
- * Ported from Morse Expert 1.15 com.ve3nea.morse_expert.MainActivity (converted to a plain controller class):
- * - AndroidView embeds the original activity_main.xml (ConstraintLayout root, with decodedTextView/scaleView/
- *   statusTextView/verticalLayout/waterfallView);
- * - Lifecycle onCreate/onResume/onPause/onDestroy fully delegated to the controller, same order as the original Activity
- *   (onCreate must run before onResume; onDispose runs onPause then onDestroy);
- * - Mic permission (RECORD_AUDIO) is managed on the Compose side; onPermissionGranted() (= v()) is called once granted,
- *   an initialized flag guarantees it runs only once (v() news an a() which overwrites f11036E);
- * - The original options_menu Clear/Pause/Save/Record/Settings became a top button row (icons from the module's original drawables).
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
- * Note: setImmersive(window, false) inside the controller's onCreate restores the host window to
- * decorFitsSystemWindows(true) (ported original behavior; affects the whole host Activity).
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 package com.rtbishop.look4sat.feature.cw
 
 import android.Manifest
 import android.app.Activity
-import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.Uri
 import android.provider.Settings
-import android.view.LayoutInflater
-import androidx.activity.compose.BackHandler
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.background
@@ -36,169 +35,233 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.systemBarsPadding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Button
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.viewinterop.AndroidView
-import androidx.constraintlayout.widget.ConstraintLayout
-import com.ve3nea.morse_expert.MainActivity
+import androidx.compose.ui.unit.sp
+import androidx.core.content.ContextCompat
+import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
+import com.rtbishop.look4sat.core.presentation.R as CoreR
+import kotlinx.coroutines.launch
 
+/**
+ * Full-page CW decoder backed by DeepCW.
+ *
+ * Layout follows the DeepCW reference app: waterfall on top, the live line
+ * under it, then the scrolling history. Pause/clear controls and the microphone
+ * permission flow carry over from the previous page.
+ *
+ * There is no settings dialog any more: the model analyses a fixed
+ * 400-1200 Hz window and tracks speed on its own, so there is nothing to tune.
+ */
 @Composable
 fun CwDecodeScreen(navigateUp: () -> Unit = {}) {
     val context = LocalContext.current
-    val activity = remember(context) {
-        context as? Activity ?: error("CwDecodeScreen must be hosted in an Activity")
-    }
-    // Ported controller (plain class, not an Activity); new instance per page entry
-    val controller = remember { MainActivity() }
-    // Inflate the original layout early so AndroidView and the controller's onCreate share one root view
-    val rootView = remember(context) {
-        LayoutInflater.from(context).inflate(R.layout.activity_main, null) as ConstraintLayout
-    }
+    val container = remember { (context.applicationContext as IContainerProvider).getMainContainer() }
+    val decoder = remember { container.provideCwDecoder() }
+    val audioCapture = remember { container.provideAudioCapture() }
+    val waterfall = remember { CwWaterfallState() }
 
     var permissionGranted by remember {
         mutableStateOf(
-            context.checkSelfPermission(Manifest.permission.RECORD_AUDIO) ==
+            ContextCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO) ==
                 PackageManager.PERMISSION_GRANTED
         )
     }
     var permanentlyDenied by remember { mutableStateOf(false) }
-    // v() news an a() which overwrites f11036E; must run exactly once
-    var initialized by remember { mutableStateOf(false) }
-    var showSettings by remember { mutableStateOf(false) }
+    var isListening by remember { mutableStateOf(false) }
 
-    // Lifecycle: onCreate before onResume; onDispose runs onPause then onDestroy
-    DisposableEffect(Unit) {
-        controller.onCreate(activity, rootView)
-        controller.onResume()
-        onDispose {
-            controller.onPause()
-            controller.onDestroy()
-        }
-    }
-
-    // Start the decode core after permission granted; both "already granted on entry" and "granted via dialog" go here
-    LaunchedEffect(permissionGranted) {
-        if (permissionGranted && !initialized) {
-            controller.onPermissionGranted() // = v(): 创建音频采集 + 解码核心
-            // v() only creates the core; the page is already resumed, so run onResume again to start recording immediately
-            // (AudioRecord is freshly created so startRecording won't double-start; GLSurfaceView.onResume is idempotent)
-            controller.onResume()
-            initialized = true
-        }
-    }
+    val decodedText by decoder.decodedText.collectAsState()
+    val estimatedPitch by decoder.estimatedPitch.collectAsState()
+    val signalStrength by decoder.signalStrength.collectAsState()
+    val inferenceMs by decoder.lastInferenceMs.collectAsState()
+    val errorMessage by decoder.errorMessage.collectAsState()
 
     val permissionLauncher = rememberLauncherForActivityResult(
         ActivityResultContracts.RequestPermission()
     ) { granted ->
         permissionGranted = granted
-        permanentlyDenied = !granted &&
+        val activity = context as? Activity
+        permanentlyDenied = !granted && activity != null &&
             !activity.shouldShowRequestPermissionRationale(Manifest.permission.RECORD_AUDIO)
+        if (granted) isListening = true
     }
 
-    // Original tap_back_again_to_close: single Back shows a hint; press again within 2 s to exit
-    BackHandler {
-        if (!controller.handleBackPress()) navigateUp()
+    // Capture runs only while listening; cancelling the effect stops the mic.
+    LaunchedEffect(isListening, permissionGranted) {
+        if (!isListening || !permissionGranted) return@LaunchedEffect
+        launch {
+            audioCapture.audioFlow().collect { chunk ->
+                decoder.processBuffer(chunk, audioCapture.sampleRate)
+                waterfall.pushSamples(chunk, audioCapture.sampleRate)
+            }
+        }
     }
 
-    if (showSettings) {
-        CwSettingsDialog(controller = controller, onDismiss = { showSettings = false })
+    LaunchedEffect(permissionGranted) {
+        if (permissionGranted) isListening = true
     }
 
-    Column(
-        modifier = Modifier
-            .fillMaxSize()
-            .systemBarsPadding()
-    ) {
-        // Original options_menu: Pause/Clear/Save (original icons) + Record/Settings (text buttons)
+    DisposableEffect(Unit) {
+        onDispose {
+            // OrtSession holds native memory and must be released explicitly.
+            decoder.close()
+        }
+    }
+
+    Column(modifier = Modifier.fillMaxSize()) {
         Row(
             modifier = Modifier
                 .fillMaxWidth()
-                .padding(horizontal = 4.dp),
-            verticalAlignment = Alignment.CenterVertically,
-            horizontalArrangement = Arrangement.SpaceEvenly
+                .padding(horizontal = 4.dp, vertical = 2.dp),
+            verticalAlignment = Alignment.CenterVertically
         ) {
-            IconButton(onClick = { controller.togglePause() }) {
+            IconButton(onClick = { isListening = false; navigateUp() }) {
                 Icon(
-                    painter = painterResource(R.drawable.ic_baseline_pause_24),
-                    contentDescription = stringResource(R.string.pause)
+                    painter = painterResource(CoreR.drawable.ic_back),
+                    contentDescription = stringResource(R.string.cw_back)
                 )
             }
-            IconButton(onClick = { controller.clearDecoded() }) {
-                Icon(
-                    painter = painterResource(R.drawable.ic_baseline_delete_24),
-                    contentDescription = stringResource(R.string.clear)
+            Column(modifier = Modifier.weight(1f)) {
+                Text(
+                    text = stringResource(CoreR.string.nav_cw),
+                    style = MaterialTheme.typography.titleMedium
+                )
+                Text(
+                    text = if (estimatedPitch != null) {
+                        stringResource(R.string.cw_status_tone, estimatedPitch!!.toInt(), inferenceMs)
+                    } else {
+                        stringResource(R.string.cw_status_listening)
+                    },
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
                 )
             }
-            IconButton(onClick = { controller.saveText() }) {
+            IconButton(onClick = { isListening = !isListening }) {
                 Icon(
-                    painter = painterResource(R.drawable.ic_baseline_save_24),
-                    contentDescription = stringResource(R.string.save_text)
+                    painter = painterResource(
+                        if (isListening) CoreR.drawable.ic_pause else CoreR.drawable.ic_play
+                    ),
+                    contentDescription = stringResource(
+                        if (isListening) R.string.cw_pause else R.string.cw_resume
+                    )
                 )
             }
-            // recordSignals needs the decode core (f11037F); disabled until initialized
-            TextButton(
-                onClick = { if (initialized) controller.recordSignals() },
-                enabled = initialized
-            ) {
-                Text(stringResource(R.string.record_signals))
-            }
-            TextButton(onClick = { showSettings = true }) {
-                Text(stringResource(R.string.settings))
+            IconButton(onClick = { decoder.reset(); waterfall.clear() }) {
+                Icon(
+                    painter = painterResource(CoreR.drawable.ic_delete),
+                    contentDescription = stringResource(R.string.cw_clear)
+                )
             }
         }
 
-        Box(modifier = Modifier.weight(1f).fillMaxWidth()) {
-            AndroidView(
-                factory = { rootView },
-                modifier = Modifier.fillMaxSize()
+        Box(
+            modifier = Modifier
+                .fillMaxWidth()
+                .height(150.dp)
+                .padding(horizontal = 8.dp)
+                .clip(RoundedCornerShape(8.dp))
+        ) {
+            CwWaterfallView(state = waterfall, signalStrength = signalStrength)
+        }
+
+        Text(
+            text = decodedText.takeLast(64).ifEmpty { "…" },
+            fontSize = 20.sp,
+            fontFamily = FontFamily.Monospace,
+            color = MaterialTheme.colorScheme.primary,
+            maxLines = 1,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 12.dp, vertical = 6.dp)
+        )
+
+        Box(
+            modifier = Modifier
+                .weight(1f)
+                .fillMaxWidth()
+                .padding(horizontal = 8.dp, vertical = 4.dp)
+                .clip(RoundedCornerShape(8.dp))
+                .background(MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.4f))
+        ) {
+            Text(
+                text = decodedText,
+                modifier = Modifier
+                    .fillMaxSize()
+                    .verticalScroll(rememberScrollState())
+                    .padding(8.dp),
+                fontSize = 16.sp,
+                fontFamily = FontFamily.Monospace,
+                color = MaterialTheme.colorScheme.onSurface
             )
-            if (!permissionGranted) {
-                // Mic permission not granted: overlay + hint text + request button
+
+            errorMessage?.let { message ->
                 Box(
                     modifier = Modifier
                         .fillMaxSize()
-                        .background(Color(0x99000000)),
+                        .background(MaterialTheme.colorScheme.errorContainer.copy(alpha = 0.9f)),
                     contentAlignment = Alignment.Center
                 ) {
-                    Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                    Text(
+                        text = message,
+                        color = MaterialTheme.colorScheme.onErrorContainer,
+                        textAlign = TextAlign.Center,
+                        modifier = Modifier.padding(16.dp)
+                    )
+                }
+            }
+
+            if (!permissionGranted) {
+                Box(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .background(MaterialTheme.colorScheme.scrim.copy(alpha = 0.6f)),
+                    contentAlignment = Alignment.Center
+                ) {
+                    Column(
+                        horizontalAlignment = Alignment.CenterHorizontally,
+                        verticalArrangement = Arrangement.spacedBy(12.dp)
+                    ) {
                         Text(
                             text = stringResource(R.string.cw_mic_permission),
-                            color = Color.White,
+                            color = MaterialTheme.colorScheme.inverseOnSurface,
                             textAlign = TextAlign.Center,
                             modifier = Modifier.padding(horizontal = 24.dp)
                         )
-                        Spacer(modifier = Modifier.height(12.dp))
                         Button(onClick = {
                             permissionLauncher.launch(Manifest.permission.RECORD_AUDIO)
                         }) {
                             Text(stringResource(R.string.cw_grant_permission))
                         }
                         if (permanentlyDenied) {
-                            // "Never ask again" checked: guide user to system settings
                             TextButton(onClick = {
-                                activity.startActivity(
+                                context.startActivity(
                                     Intent(
                                         Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
-                                        Uri.parse("package:${activity.packageName}")
+                                        Uri.fromParts("package", context.packageName, null)
                                     )
                                 )
                             }) {
@@ -209,5 +272,7 @@ fun CwDecodeScreen(navigateUp: () -> Unit = {}) {
                 }
             }
         }
+
+        Spacer(modifier = Modifier.height(4.dp))
     }
 }

feature/cw/src/main/java/com/rtbishop/look4sat/feature/cw/CwSettingsDialog.kt

@@ -1,218 +0,0 @@
-/*
- * Look4Sat. Amateur radio satellite tracker and pass predictor.
- * Copyright (C) 2019-2026 Arty Bishop and contributors.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- */
-package com.rtbishop.look4sat.feature.cw
-
-import android.content.Context
-import androidx.compose.foundation.background
-import androidx.compose.foundation.border
-import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.foundation.verticalScroll
-import androidx.compose.material3.AlertDialog
-import androidx.compose.material3.HorizontalDivider
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.RadioButton
-import androidx.compose.material3.Slider
-import androidx.compose.material3.Text
-import androidx.compose.material3.TextButton
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.clip
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.text.style.TextAlign
-import androidx.compose.ui.unit.dp
-import com.ve3nea.morse_expert.MainActivity
-import kotlin.math.roundToInt
-
-/** Keys/defaults ported from the original Morse Expert (root_preferences.xml + SettingsActivity logic). */
-private const val KEY_MESSAGE_TYPE = "message_type"
-private const val KEY_TEXT_FONT_SIZE = "text_font_size"
-private const val DEFAULT_MESSAGE_TYPE = "general_text"
-private const val DEFAULT_TEXT_FONT_SIZE = 18
-private const val MIN_FONT_SIZE = 7
-private const val MAX_FONT_SIZE = 99
-
-/** Preset palette (9 colors, 3x3 grid); the original ColorPreferenceCompat used a third-party colorpicker, not imported. */
-private val PaletteColors = listOf(
-    0xFFD0F0F0.toInt(), 0xFF000000.toInt(), 0xFFFFFFFF.toInt(),
-    0xFFAAAAAA.toInt(), 0xFFFF0000.toInt(), 0xFF00FF00.toInt(),
-    0xFF0000FF.toInt(), 0xFFFFFF00.toInt(), 0xFFFF00FF.toInt(),
-)
-
-/**
- * CW settings dialog (replaces the original Morse Expert SettingsActivity).
- * Items and keys ported from the original APK: message_type / text_font_size / 9 colors
- * (I2.b.f663b keys, I2.b.f664d defaults, I2.b.c English titles).
- * Storage: SharedPreferences(getPackageName() + "_preferences").
- * OK saves and calls controller.onResume() to take effect at once; Cancel/outside-tap only closes without saving.
- */
-@Composable
-fun CwSettingsDialog(controller: MainActivity, onDismiss: () -> Unit) {
-    val activity = controller.mActivity ?: return
-    val prefs = remember(activity) {
-        activity.getSharedPreferences(activity.packageName + "_preferences", Context.MODE_PRIVATE)
-    }
-
-    var messageType by remember {
-        mutableStateOf(prefs.getString(KEY_MESSAGE_TYPE, DEFAULT_MESSAGE_TYPE) ?: DEFAULT_MESSAGE_TYPE)
-    }
-    var fontSize by remember {
-        mutableStateOf(
-            prefs.getInt(KEY_TEXT_FONT_SIZE, DEFAULT_TEXT_FONT_SIZE)
-                .toFloat().coerceIn(MIN_FONT_SIZE.toFloat(), MAX_FONT_SIZE.toFloat())
-        )
-    }
-    var colorValues by remember {
-        mutableStateOf(IntArray(9) { i -> prefs.getInt(I2.b.f663b[i], I2.b.f664d[i]) })
-    }
-
-    AlertDialog(
-        onDismissRequest = onDismiss,
-        title = { Text("CW Settings") },
-        text = {
-            Column(
-                modifier = Modifier
-                    .verticalScroll(rememberScrollState())
-                    .padding(top = 4.dp)
-            ) {
-                Text("Message type", style = MaterialTheme.typography.titleSmall)
-                MessageTypeRow("general_text", "General Text", messageType) { messageType = it }
-                MessageTypeRow("ham_radio_qso", "Ham Radio QSO", messageType) { messageType = it }
-                HorizontalDivider(Modifier.padding(vertical = 8.dp))
-
-                Text("Text font size", style = MaterialTheme.typography.titleSmall)
-                Row(verticalAlignment = Alignment.CenterVertically) {
-                    Slider(
-                        value = fontSize,
-                        onValueChange = { fontSize = it },
-                        valueRange = MIN_FONT_SIZE.toFloat()..MAX_FONT_SIZE.toFloat(),
-                        steps = MAX_FONT_SIZE - MIN_FONT_SIZE - 1,
-                        modifier = Modifier.weight(1f),
-                    )
-                    Text(
-                        text = "${fontSize.roundToInt()}",
-                        style = MaterialTheme.typography.titleMedium,
-                        textAlign = TextAlign.End,
-                        modifier = Modifier.width(44.dp),
-                    )
-                }
-                HorizontalDivider(Modifier.padding(vertical = 8.dp))
-
-                Text("Colors", style = MaterialTheme.typography.titleSmall)
-                for (i in 0 until 9) {
-                    ColorSettingRow(
-                        title = I2.b.c[i],
-                        value = colorValues[i],
-                        onSelect = { selected ->
-                            colorValues = colorValues.copyOf().also { it[i] = selected }
-                        },
-                    )
-                }
-            }
-        },
-        confirmButton = {
-            TextButton(onClick = {
-                val editor = prefs.edit()
-                editor.putString(KEY_MESSAGE_TYPE, messageType)
-                editor.putInt(KEY_TEXT_FONT_SIZE, fontSize.roundToInt())
-                for (i in 0 until 9) {
-                    editor.putInt(I2.b.f663b[i], colorValues[i])
-                }
-                editor.apply()
-                // The original re-read all settings in MainActivity.onResume() when SettingsActivity returned; ported logic in place
-                controller.onResume()
-                onDismiss()
-            }) { Text("OK") }
-        },
-        dismissButton = {
-            TextButton(onClick = onDismiss) { Text("Cancel") }
-        },
-    )
-}
-
-@Composable
-private fun MessageTypeRow(option: String, label: String, selected: String, onSelect: (String) -> Unit) {
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .clip(RoundedCornerShape(6.dp))
-            .clickable { onSelect(option) }
-            .padding(vertical = 2.dp),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        RadioButton(selected = option == selected, onClick = { onSelect(option) })
-        Text(label, style = MaterialTheme.typography.bodyMedium)
-    }
-}
-
-@Composable
-private fun ColorSettingRow(title: String, value: Int, onSelect: (Int) -> Unit) {
-    Column(Modifier.fillMaxWidth().padding(vertical = 6.dp)) {
-        Row(verticalAlignment = Alignment.CenterVertically) {
-            Text(title, style = MaterialTheme.typography.bodyMedium, modifier = Modifier.weight(1f))
-            Box(
-                Modifier
-                    .size(20.dp)
-                    .clip(RoundedCornerShape(4.dp))
-                    .background(Color(value)),
-            )
-            Spacer(Modifier.width(6.dp))
-            Text(
-                text = String.format("#%06X", value and 0xFFFFFF),
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
-        }
-        Spacer(Modifier.height(6.dp))
-        PaletteGrid(selected = value, onSelect = onSelect)
-    }
-}
-
-@Composable
-private fun PaletteGrid(selected: Int, onSelect: (Int) -> Unit) {
-    Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
-        PaletteColors.chunked(3).forEach { rowColors ->
-            Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
-                rowColors.forEach { color ->
-                    val isSelected = color == selected
-                    Box(
-                        modifier = Modifier
-                            .size(36.dp)
-                            .border(
-                                width = if (isSelected) 3.dp else 1.dp,
-                                color = if (isSelected) MaterialTheme.colorScheme.primary
-                                else MaterialTheme.colorScheme.outlineVariant,
-                                shape = RoundedCornerShape(6.dp),
-                            )
-                            .clip(RoundedCornerShape(6.dp))
-                            .background(Color(color))
-                            .clickable { onSelect(color) },
-                    )
-                }
-            }
-        }
-    }
-}

feature/cw/src/main/java/com/rtbishop/look4sat/feature/cw/CwWaterfall.kt

@@ -0,0 +1,135 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.feature.cw
+
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Color
+import com.rtbishop.look4sat.core.domain.cw.CwDeepSpectrogram
+
+/**
+ * Rolling spectrogram history for the waterfall display.
+ *
+ * Reuses [CwDeepSpectrogram] so the picture shows exactly the 400-1200 Hz band
+ * and the same magnitudes the model sees — what you look at is what it decodes.
+ */
+class CwWaterfallState(private val historyRows: Int = 96) {
+
+    private val rows = ArrayDeque<FloatArray>(historyRows)
+    private val pending = ArrayList<Float>(CwDeepSpectrogram.SAMPLE_RATE)
+
+    /** Bumped on every change so Compose knows to redraw. */
+    val revision = mutableIntStateOf(0)
+
+    /** Snapshot for drawing, oldest row first. */
+    fun snapshot(): List<FloatArray> = rows.toList()
+
+    fun pushSamples(chunk: FloatArray, sampleRate: Int) {
+        if (chunk.isEmpty()) return
+        val resampled = CwDeepSpectrogram.resampleLinear(
+            chunk, sampleRate, CwDeepSpectrogram.SAMPLE_RATE
+        )
+        pending.ensureCapacity(pending.size + resampled.size)
+        for (sample in resampled) pending.add(sample)
+
+        // Need at least one FFT window before a row can be produced.
+        if (pending.size < CwDeepSpectrogram.FFT_LENGTH) return
+
+        val audio = FloatArray(pending.size) { pending[it] }
+        pending.clear()
+
+        for (row in CwDeepSpectrogram.compute(audio)) {
+            if (rows.size >= historyRows) rows.removeFirst()
+            rows.addLast(row)
+        }
+        revision.intValue++
+    }
+
+    fun clear() {
+        rows.clear()
+        pending.clear()
+        revision.intValue++
+    }
+}
+
+/**
+ * Draws the waterfall newest-row-last, one pixel column per frequency bin.
+ * Colour ramp goes dark blue -> cyan -> yellow with magnitude.
+ */
+@Composable
+internal fun CwWaterfallView(
+    state: CwWaterfallState,
+    signalStrength: Float,
+    modifier: Modifier = Modifier
+) {
+    // Reading the revision inside the draw scope is what triggers redraws as
+    // new spectra arrive; without it the canvas would render only once.
+    val revision = state.revision.intValue
+
+    Canvas(modifier = modifier.fillMaxSize()) {
+        drawRect(color = Color(0xFF00060F), size = size)
+
+        val rows = state.snapshot()
+        if (rows.isEmpty()) return@Canvas
+
+        // Scale to the loudest value on screen so quiet signals stay visible.
+        var peak = 0f
+        for (row in rows) for (v in row) if (v > peak) peak = v
+        if (peak <= 0f) return@Canvas
+
+        val rowHeight = size.height / rows.size
+        val binWidth = size.width / CwDeepSpectrogram.FREQUENCY_BINS
+
+        for ((index, row) in rows.withIndex()) {
+            val y = index * rowHeight
+            for (bin in row.indices) {
+                val magnitude = (row[bin] / peak).coerceIn(0f, 1f)
+                if (magnitude < 0.06f) continue
+                drawRect(
+                    color = rampColor(magnitude),
+                    topLeft = Offset(bin * binWidth, y),
+                    size = Size(binWidth + 1f, rowHeight + 1f)
+                )
+            }
+        }
+
+        if (signalStrength > 0f) {
+            drawRect(
+                color = Color(0xFF4CD964).copy(alpha = 0.8f),
+                topLeft = Offset(0f, size.height - 3f),
+                size = Size(size.width * signalStrength.coerceIn(0f, 1f), 3f)
+            )
+        }
+    }
+}
+
+private fun rampColor(magnitude: Float): Color = when {
+    magnitude < 0.5f -> {
+        val t = magnitude / 0.5f
+        Color(red = 0f, green = 0.35f * t, blue = 0.35f + 0.55f * t)
+    }
+    else -> {
+        val t = (magnitude - 0.5f) / 0.5f
+        Color(red = t, green = 0.35f + 0.6f * t, blue = 0.9f - 0.8f * t)
+    }
+}

feature/cw/src/main/res/values-id/app_values.xml

@@ -1,22 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="purple_500">#ff6200ee</color>
-    <integer name="default_font_size">18</integer>
-    <string name="idle">Diam</string>
-    <string name="waterfall_display">Tampilan waterfall</string>
-    <string name="frequency_scale">Skala frekuensi</string>
-    <string name="decoded_text">Teks terdekode</string>
-    <string name="clear">Bersihkan</string>
-    <string name="pause">Jeda Dekode</string>
-    <string name="save_text">Simpan Teks</string>
-    <string name="record_signals">Rekam Sinyal</string>
-    <string name="settings">Pengaturan</string>
-    <string name="help">Bantuan Daring</string>
-    <string name="rate">Nilai Aplikasi Ini</string>
-    <string name="premium">Dapatkan Versi Premium</string>
-    <string name="tap_back_again_to_close">Ketuk Kembali lagi untuk menutup aplikasi</string>
-    <string name="message_type">Tipe Pesan</string>
-    <string name="cw_mic_permission">Izin mikrofon diperlukan untuk dekode CW</string>
-    <string name="cw_grant_permission">Beri izin</string>
+    <string name="cw_back">Kembali</string>
+    <string name="cw_pause">Jeda pendekodean</string>
+    <string name="cw_resume">Lanjutkan pendekodean</string>
+    <string name="cw_clear">Hapus teks hasil dekode</string>
+    <string name="cw_status_listening">Mendengarkan…</string>
+    <string name="cw_status_tone">%1$d Hz · %2$d ms</string>
+    <string name="cw_mic_permission">Izin mikrofon diperlukan untuk pendekodean CW</string>
+    <string name="cw_grant_permission">Berikan izin</string>
     <string name="cw_open_settings">Buka pengaturan aplikasi</string>
 </resources>

feature/cw/src/main/res/values-in/app_values.xml

@@ -1,22 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="purple_500">#ff6200ee</color>
-    <integer name="default_font_size">18</integer>
-    <string name="idle">Diam</string>
-    <string name="waterfall_display">Tampilan waterfall</string>
-    <string name="frequency_scale">Skala frekuensi</string>
-    <string name="decoded_text">Teks terdekode</string>
-    <string name="clear">Bersihkan</string>
-    <string name="pause">Jeda Dekode</string>
-    <string name="save_text">Simpan Teks</string>
-    <string name="record_signals">Rekam Sinyal</string>
-    <string name="settings">Pengaturan</string>
-    <string name="help">Bantuan Daring</string>
-    <string name="rate">Nilai Aplikasi Ini</string>
-    <string name="premium">Dapatkan Versi Premium</string>
-    <string name="tap_back_again_to_close">Ketuk Kembali lagi untuk menutup aplikasi</string>
-    <string name="message_type">Tipe Pesan</string>
-    <string name="cw_mic_permission">Izin mikrofon diperlukan untuk dekode CW</string>
-    <string name="cw_grant_permission">Beri izin</string>
+    <string name="cw_back">Kembali</string>
+    <string name="cw_pause">Jeda pendekodean</string>
+    <string name="cw_resume">Lanjutkan pendekodean</string>
+    <string name="cw_clear">Hapus teks hasil dekode</string>
+    <string name="cw_status_listening">Mendengarkan…</string>
+    <string name="cw_status_tone">%1$d Hz · %2$d ms</string>
+    <string name="cw_mic_permission">Izin mikrofon diperlukan untuk pendekodean CW</string>
+    <string name="cw_grant_permission">Berikan izin</string>
     <string name="cw_open_settings">Buka pengaturan aplikasi</string>
 </resources>

feature/cw/src/main/res/values-tr/app_values.xml

@@ -1,22 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="purple_500">#ff6200ee</color>
-    <integer name="default_font_size">18</integer>
-    <string name="idle">Beklemede</string>
-    <string name="waterfall_display">Şelale görüntüsü</string>
-    <string name="frequency_scale">Frekans ölçeği</string>
-    <string name="decoded_text">Çözülen metin</string>
-    <string name="clear">Temizle</string>
-    <string name="pause">Çözmeyi Duraklat</string>
-    <string name="save_text">Metni Kaydet</string>
-    <string name="record_signals">Sinyalleri Kaydet</string>
-    <string name="settings">Ayarlar</string>
-    <string name="help">Çevrimiçi Yardım</string>
-    <string name="rate">Bu Uygulamayı Değerlendir</string>
-    <string name="premium">Premium Sürümü Al</string>
-    <string name="tap_back_again_to_close">Kapatmak için Geriye tekrar dokunun</string>
-    <string name="message_type">Mesaj Türü</string>
-    <string name="cw_mic_permission">CW çözme için mikrofon izni gereklidir</string>
+    <string name="cw_back">Geri</string>
+    <string name="cw_pause">Çözmeyi duraklat</string>
+    <string name="cw_resume">Çözmeyi sürdür</string>
+    <string name="cw_clear">Çözülen metni temizle</string>
+    <string name="cw_status_listening">Dinleniyor…</string>
+    <string name="cw_status_tone">%1$d Hz · %2$d ms</string>
+    <string name="cw_mic_permission">CW çözümü için mikrofon izni gerekli</string>
     <string name="cw_grant_permission">İzin ver</string>
     <string name="cw_open_settings">Uygulama ayarlarını aç</string>
 </resources>

feature/cw/src/main/res/values-zh/app_values.xml

@@ -1,21 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="purple_500">#ff6200ee</color>
-    <integer name="default_font_size">18</integer>
-    <string name="idle">空闲</string>
-    <string name="waterfall_display">瀑布图</string>
-    <string name="frequency_scale">频率刻度</string>
-    <string name="decoded_text">解码文本</string>
-    <string name="clear">清除</string>
-    <string name="pause">暂停解码</string>
-    <string name="save_text">保存文本</string>
-    <string name="record_signals">录音信号</string>
-    <string name="settings">设置</string>
-    <string name="help">在线帮助</string>
-    <string name="rate">评价此应用</string>
-    <string name="premium">获取高级版</string>
-    <string name="tap_back_again_to_close">再次按返回键退出应用</string>
-    <string name="message_type">消息类型</string>
+    <string name="cw_back">返回</string>
+    <string name="cw_pause">暂停解码</string>
+    <string name="cw_resume">继续解码</string>
+    <string name="cw_clear">清空解码文本</string>
+    <string name="cw_status_listening">正在监听…</string>
+    <string name="cw_status_tone">%1$d Hz · %2$d 毫秒</string>
     <string name="cw_mic_permission">CW 解码需要麦克风权限</string>
     <string name="cw_grant_permission">授予权限</string>
     <string name="cw_open_settings">打开应用设置</string>

feature/cw/src/main/res/values/app_values.xml

@@ -1,21 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="purple_500">#ff6200ee</color>
-    <integer name="default_font_size">18</integer>
-    <string name="idle">Idle</string>
-    <string name="waterfall_display">Waterfall display</string>
-    <string name="frequency_scale">Frequency scale</string>
-    <string name="decoded_text">Decoded text</string>
-    <string name="clear">Clear</string>
-    <string name="pause">Pause Decoding</string>
-    <string name="save_text">Save Text</string>
-    <string name="record_signals">Record Signals</string>
-    <string name="settings">Settings</string>
-    <string name="help">Online Help</string>
-    <string name="rate">Rate this App</string>
-    <string name="premium">Get Premium Version</string>
-    <string name="tap_back_again_to_close">Tap Back again to close the app</string>
-    <string name="message_type">Message Type</string>
+    <string name="cw_back">Back</string>
+    <string name="cw_pause">Pause decoding</string>
+    <string name="cw_resume">Resume decoding</string>
+    <string name="cw_clear">Clear decoded text</string>
+    <string name="cw_status_listening">Listening…</string>
+    <string name="cw_status_tone">%1$d Hz · %2$d ms</string>
     <string name="cw_mic_permission">Microphone permission is required for CW decoding</string>
     <string name="cw_grant_permission">Grant permission</string>
     <string name="cw_open_settings">Open app settings</string>