feat(radar,cw): transponder CW panel switches to the Morse Expert engine

Background: the transponder panel CW decoder (added by the upstream
fork author) used a lightweight Kotlin Bayesian engine (core/domain/cw,
kept untouched as a fallback). This change makes the panel use the
Morse Expert engine ported in 4.5.0, so both CW entry points share the
same decoder with a live waterfall.

Changes:
- New mini layout cw_panel_main.xml (waterfall 80dp + decoded text,
  status line hidden but ID kept for controller lookup)
- MainActivity.onCreate overload with applyImmersive flag; panel binds
  with false so the host window system bars are not touched
- CwDecoderPanel now embeds the mini layout via AndroidView and drives
  the MainActivity controller: start/stop/reset map to the engine,
  lifecycle follows panel expand (start) / collapse (release mic)
- radar module now depends on feature:cw (+ constraintlayout 2.2.1,
  same as cw) for layout + controller reuse
- What's new rewritten in EN/TR/ZH for this release only

Verified: :feature:radar:compileDebugKotlin and :app:compileDebugKotlin
BUILD SUCCESSFUL locally; check_strings.py OK (7 files, no bare
apostrophes).

core/presentation/src/main/res/values-tr/strings.xml

@@ -52,8 +52,8 @@
         \n\nDoğru tahminler alabilmek için veritabanını en az haftada bir güncelleyin.</string>
     <string name="pass_whatsnew_title" translatable="false">What\'s new in Look4Sat</string>
         <string name="pass_whatsnew_message" translatable="false">
-        * Yeni CW Kod Çözücü sayfası (Roaming ile Harita arasında): mikrofondan canlı Morse kodu çözme ve şelale (waterfall) görüntüsü
-        * Ayarlar: mesaj tipi, yazı boyutu ve 9 renk teması</string>
+        * Transponder CW kod çözücü paneli artık geliştirilmiş kod çözme motorunu canlı şelale (waterfall) görüntüsüyle kullanıyor
+        * CW kod çözme sayfaları aynı motoru paylaşıyor: gezinme sayfası ve transponder paneli</string>
 
     <!-- Radar screen -->
     <string name="radar_back">Geri</string>

core/presentation/src/main/res/values-zh/strings.xml

@@ -42,8 +42,8 @@
     <string name="pass_welcome_message">请务必在设置中通过GPS、经纬度或QTH定位您的位置\n建议至少每周更新一次数据库，以确保预测结果的准确性</string>
     <string name="pass_whatsnew_title">Look4Sat Pro 更新内容</string>
         <string name="pass_whatsnew_message" translatable="false">
-        * 新增 CW 解码页(漫游与地图之间): 麦克风实时摩尔斯电码解码 + 瀑布图显示
-        * 设置: 消息类型、字体大小、9 种颜色主题</string>
+        * 转发器 CW 解码面板已接入增强解码引擎,带实时瀑布图显示
+        * CW 解码入口共用同一引擎:导航页与转发器面板</string>
 
     <!-- Radar screen -->
     <string name="radar_back">后退</string>

core/presentation/src/main/res/values/strings.xml

@@ -54,8 +54,8 @@
         \n\nPlease update the database at least weekly to get accurate predictions.</string>
     <string name="pass_whatsnew_title" translatable="false">What\'s new in Look4Sat</string>
         <string name="pass_whatsnew_message" translatable="false">
-        * New CW Decoder page (between Roaming and Map): live Morse code decoding from the microphone with waterfall display
-        * Settings: message type, font size and 9 color themes</string>
+        * Transponder CW decoder panel now uses the enhanced decoding engine with a live waterfall display
+        * CW decoding pages share the same engine: navigation page and transponder panel</string>
 
     <!-- Radar screen -->
     <string name="radar_back">Back</string>

feature/cw/src/main/java/com/ve3nea/morse_expert/MainActivity.java

@@ -48,9 +48,19 @@ public class MainActivity {
     public android.app.Activity mActivity;
 
     public void onCreate(android.app.Activity activity, ConstraintLayout constraintLayout) {
+        onCreate(activity, constraintLayout, true);
+    }
+
+    /**
+     * applyImmersive=false 用于嵌入小容器(如转发器 CW 面板):
+     * 不触碰宿主窗口的系统栏标志(避免影响整个 Activity)。
+     */
+    public void onCreate(android.app.Activity activity, ConstraintLayout constraintLayout, boolean applyImmersive) {
         this.mActivity = activity;
-        // K1.a.M(getWindow(), false): immersive status bar (nav/fullscreen flags, ported as-is)
-        setImmersive(activity.getWindow(), false);
+        if (applyImmersive) {
+            // K1.a.M(getWindow(), false): immersive status bar (nav/fullscreen flags, ported as-is)
+            setImmersive(activity.getWindow(), false);
+        }
         View inflate = constraintLayout;
         int i4 = R.id.decodedTextView;
         DecodedTextView decodedTextView = (DecodedTextView) findViewRecursive(inflate, R.id.decodedTextView);

feature/cw/src/main/res/layout/cw_panel_main.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+    <LinearLayout
+        android:orientation="vertical"
+        android:id="@+id/verticalLayout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:keepScreenOn="true">
+        <TextView
+            android:textColor="#ffffff"
+            android:textSize="10sp"
+            android:singleLine="true"
+            android:ellipsize="end"
+            android:visibility="gone"
+            android:id="@+id/statusTextView"
+            android:background="@color/purple_500"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/idle"/>
+        <LinearLayout
+            android:orientation="horizontal"
+            android:layout_width="match_parent"
+            android:layout_height="80dp">
+            <com.ve3nea.morse_expert.WaterfallSurfaceView
+                android:id="@+id/waterfallView"
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:contentDescription="@string/waterfall_display"/>
+            <com.ve3nea.morse_expert.ScaleView
+                android:id="@+id/scaleView"
+                android:background="#24545a"
+                android:layout_width="8dp"
+                android:layout_height="match_parent"
+                android:layout_weight="0"
+                android:contentDescription="@string/frequency_scale"/>
+        </LinearLayout>
+        <com.ve3nea.morse_expert.DecodedTextView
+            android:textSize="12sp"
+            android:typeface="monospace"
+            android:textColor="#444444"
+            android:textColorHint="#888888"
+            android:gravity="start|top"
+            android:id="@+id/decodedTextView"
+            android:background="#d1f0f4"
+            android:scrollbars="vertical"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:hint="@string/decoded_text"
+            android:freezesText="false"
+            android:layout_weight="1"
+            android:minHeight="48dp"
+            android:inputType="none"
+            android:fadeScrollbars="false"
+            android:textIsSelectable="true"/>
+    </LinearLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

feature/radar/build.gradle.kts

@@ -8,4 +8,8 @@ android {
 
 dependencies {
     implementation(project(":feature:mutual"))
+    // CW 解码面板: 复用 feature:cw 的 Morse Expert 引擎(布局 cw_panel_main + MainActivity 控制器)
+    implementation(project(":feature:cw"))
+    // 与 feature:cw 一致(控制器按 ID 递归查找 ConstraintLayout 视图)
+    implementation("androidx.constraintlayout:constraintlayout:2.2.1")
 }

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/TransceiversPage.kt

@@ -17,6 +17,8 @@
  */
 package com.rtbishop.look4sat.feature.radar
 
+import android.app.Activity
+import android.view.LayoutInflater
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.expandVertically
 import androidx.compose.animation.shrinkVertically
@@ -50,6 +52,7 @@ import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -60,6 +63,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.rotate
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
@@ -68,6 +72,8 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.compose.ui.viewinterop.AndroidView
+import androidx.constraintlayout.widget.ConstraintLayout
 import com.rtbishop.look4sat.core.domain.model.SatRadio
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 import com.rtbishop.look4sat.core.domain.utility.DopplerFrequencyCalculator
@@ -75,6 +81,8 @@ import com.rtbishop.look4sat.core.presentation.CardButton
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.formatFrequency
 import com.rtbishop.look4sat.core.presentation.infiniteMarquee
+import com.rtbishop.look4sat.feature.cw.R as CwR
+import com.ve3nea.morse_expert.MainActivity
 import java.util.Locale
 import kotlin.time.Duration.Companion.milliseconds
 
@@ -661,19 +669,56 @@ private fun CwDecoderPanel(
         }
 
         AnimatedVisibility(visible = cw.isExpanded) {
+            // Morse Expert 引擎(4.5.0 移植): 小布局 cw_panel_main(瀑布图 + 解码文本)
+            // 自带 Kotlin 贝叶斯引擎(CwDecoder)不再用于此面板(代码保留作回退)
+            val context = LocalContext.current
+            val activity = remember { context as? Activity }
+            val controller = remember { MainActivity() }
+            val rootView = remember {
+                LayoutInflater.from(context).inflate(CwR.layout.cw_panel_main, null) as ConstraintLayout
+            }
+            var initialized by remember { mutableStateOf(false) }
+            var listening by remember { mutableStateOf(false) }
+
+            // 生命周期: 展开即绑定视图(不改宿主窗口); 收起/离开自动释放
+            DisposableEffect(Unit) {
+                if (activity != null) {
+                    controller.onCreate(activity, rootView, false)
+                }
+                onDispose {
+                    controller.onPause()
+                    controller.onDestroy()
+                }
+            }
+            // 权限已授予(首次进入/授权回调统一入口): 初始化引擎 + 启动录音
+            LaunchedEffect(cw.hasPermission) {
+                if (cw.hasPermission && !initialized) {
+                    controller.onPermissionGranted() // = v(): 创建音频采集 + 解码核心
+                    controller.onResume()            // 立即启动录音
+                    initialized = true
+                    listening = true
+                }
+            }
+
             Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                // Control buttons row
+                // Control buttons row(映射到控制器)
                 Row(
                     horizontalArrangement = Arrangement.spacedBy(8.dp),
                     modifier = Modifier.fillMaxWidth()
                 ) {
-                    if (cw.status == CwStatus.Idle) {
+                    if (!listening) {
                         Button(
                             onClick = {
                                 if (!cw.hasPermission) {
                                     requestMicPermission()
+                                } else if (!initialized) {
+                                    controller.onPermissionGranted()
+                                    controller.onResume()
+                                    initialized = true
+                                    listening = true
                                 } else {
-                                    onAction(RadarAction.CwStartListening)
+                                    controller.onResume()
+                                    listening = true
                                 }
                             },
                             modifier = Modifier.weight(1f)
@@ -682,58 +727,30 @@ private fun CwDecoderPanel(
                         }
                     } else {
                         Button(
-                            onClick = { onAction(RadarAction.CwStopListening) },
+                            onClick = {
+                                controller.onPause()
+                                listening = false
+                            },
                             modifier = Modifier.weight(1f)
                         ) {
                             Text(stringResource(R.string.radar_cw_stop))
                         }
                     }
                     OutlinedButton(
-                        onClick = { onAction(RadarAction.CwReset) },
+                        onClick = { controller.clearDecoded() },
                         modifier = Modifier.weight(1f)
                     ) {
                         Text(stringResource(R.string.radar_cw_reset))
                     }
                 }
 
-                // Signal strength indicator
-                if (cw.status == CwStatus.Listening && cw.signalStrength > 0f) {
-                    val strengthPct = (cw.signalStrength * 100).toInt()
-                    Text(
-                        text = "Signal: $strengthPct%",
-                        fontSize = 12.sp,
-                        color = if (cw.signalStrength > 0.5f) Color(0xFF4CAF50)
-                        else if (cw.signalStrength > 0.2f) Color(0xFFFFC107)
-                        else MaterialTheme.colorScheme.onSurfaceVariant
-                    )
-                }
-
-                // Decoded text output
-                ElevatedCard(
+                // 瀑布图 + 解码文本(原版布局迷你版, 适配容器)
+                AndroidView(
+                    factory = { rootView },
                     modifier = Modifier
                         .fillMaxWidth()
-                        .height(120.dp)
-                ) {
-                    Column(
-                        modifier = Modifier
-                            .fillMaxSize()
-                            .padding(8.dp)
-                    ) {
-                        Text(
-                            text = "Decoded:",
-                            fontSize = 12.sp,
-                            fontWeight = FontWeight.Bold,
-                            color = MaterialTheme.colorScheme.onSurfaceVariant
-                        )
-                        Spacer(modifier = Modifier.height(4.dp))
-                        Text(
-                            text = cw.decodedText.ifEmpty { "Waiting for CW signal..." },
-                            fontSize = 16.sp,
-                            fontWeight = FontWeight.Medium,
-                            color = MaterialTheme.colorScheme.onSurface
-                        )
-                    }
-                }
+                        .height(150.dp)
+                )
             }
         }
     }