fix(cw): restore app label, fix R8 code stripping, force 32-bit ABI

Three release-breaking issues found in the v4.5.0 APK (app crashed on
launch, label showed "Morse Expert", dex shrank to 282KB vs 3.5MB):
1. app_name: the ported app_values.xml shipped a "Morse Expert"
   app_name string which overrode Look4Sat Pro's label during resource
   merging - removed (no other string collisions).
2. R8 stripped nearly all code: the in-app sun.misc.Unsafe/Cleaner
   stubs clashed with android.jar library classes. Moved stubs to
   com.rtbishop.look4sat.feature.cw.suncompat and updated k3.d/s/r
   imports (k3.r keeps the reflective Class.forName("sun.misc.Unsafe")
   string, which returns null on Android hidden-API limits).
3. proguard-rules.pro added (AGP 9 variant-level
   CanProduceConsumerProguardFiles): keep pas.** (JNI RegisterNatives
   resolves by class name) plus all ported CW classes.
4. app-level ndk abiFilters forced to armeabi-v7a: the ported
   libnativedecoderjni.so is v7a-only, so a multi-ABI APK would crash
   with UnsatisfiedLinkError on arm64 devices.

Verified: :feature:cw:compileDebugKotlin BUILD SUCCESSFUL.

feature/cw/build.gradle.kts

@@ -1,3 +1,6 @@
+import com.android.build.api.dsl.LibraryExtension
+import com.android.build.api.variant.CanProduceConsumerProguardFiles
+
 plugins {
     alias(libs.plugins.convention.featurePlugin)
 }
@@ -15,6 +18,16 @@ android {
     }
 }
 
+// CW 类保持规则(JNI 按类名注册 + 照搬混淆类保逻辑), 由 app 的 R8 消费
+// AGP 9: consumer 规则走 variant 级 CanProduceConsumerProguardFiles
+androidComponents {
+    onVariants(selector().all()) { variant ->
+        (variant as? CanProduceConsumerProguardFiles)?.consumerProguardFiles?.add(
+            project.layout.projectDirectory.file("proguard-rules.pro")
+        )
+    }
+}
+
 dependencies {
     implementation("androidx.constraintlayout:constraintlayout:2.2.1")
 }

feature/cw/proguard-rules.pro

@@ -0,0 +1,31 @@
+# Look4Sat Pro — CW 解码模块(照搬 Morse Expert 1.15)混淆规则
+# 所有 CW 类保持原名: pas.* 通过 RegisterNatives 按类名注册 JNI(混淆即崩);
+# 其余为照搬的混淆名类(命名已无混淆意义, 保持以保逻辑完整)。
+
+# JNI 引擎(RegisterNatives 按类名/方法名查表)
+-keep class pas.** { *; }
+
+# 照搬的解码/UI 类(全部保持)
+-keep class com.ve3nea.morse_expert.** { *; }
+-keep class H2.** { *; }
+-keep class I2.b { *; }
+-keep class J2.** { *; }
+-keep class k3.** { *; }
+-keep class i3.** { *; }
+-keep class g3.** { *; }
+-keep class j3.** { *; }
+-keep class s.** { *; }
+-keep class d1.AbstractC1518b { *; }
+-keep class B0.b { *; }
+-keep class B.RunnableC0001b { *; }
+-keep class D.n { *; }
+-keep class E2.g { *; }
+-keep class F2.a { *; }
+-keep class I0.d { *; }
+-keep class K1.a { *; }
+-keep class j1.C1646n { *; }
+
+# sun.misc stub(Android 无此类, 仅编译期; 防止 R8 异常处理)
+-dontwarn sun.misc.**
+-keep class sun.misc.Unsafe { *; }
+-keep class sun.misc.Cleaner { *; }

feature/cw/src/main/java/com/rtbishop/look4sat/feature/cw/suncompat/Cleaner.java

@@ -1,4 +1,4 @@
-package sun.misc;
+package com.rtbishop.look4sat.feature.cw.suncompat;
 
 /**
  * 编译期 stub:Android 无 sun.misc.Cleaner(照搬 Morse Expert 1.15 k3 FFT 库的清理回调,

feature/cw/src/main/java/com/rtbishop/look4sat/feature/cw/suncompat/Unsafe.java

@@ -1,4 +1,4 @@
-package sun.misc;
+package com.rtbishop.look4sat.feature.cw.suncompat;
 
 /**
  * 编译期 stub:Android 无 sun.misc.Unsafe(运行时通过反射获取,失败时 k3.r.f12109a 为 null)。

feature/cw/src/main/java/k3/d.java

@@ -1,6 +1,6 @@
 package k3;
 
-import sun.misc.Cleaner;
+import com.rtbishop.look4sat.feature.cw.suncompat.Cleaner;
 
 /* loaded from: classes.dex */
 public final class d extends g {

feature/cw/src/main/java/k3/r.java

@@ -3,7 +3,7 @@ package k3;
 import java.lang.reflect.Field;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
-import sun.misc.Unsafe;
+import com.rtbishop.look4sat.feature.cw.suncompat.Unsafe;
 
 /* loaded from: classes.dex */
 public abstract class r {

feature/cw/src/main/java/k3/s.java

@@ -2,8 +2,8 @@ package k3;
 
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
-import sun.misc.Cleaner;
-import sun.misc.Unsafe;
+import com.rtbishop.look4sat.feature.cw.suncompat.Cleaner;
+import com.rtbishop.look4sat.feature.cw.suncompat.Unsafe;
 
 /* loaded from: classes.dex */
 public final class s extends g {

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

@@ -2,7 +2,6 @@
 <resources>
     <color name="purple_500">#ff6200ee</color>
     <integer name="default_font_size">18</integer>
-    <string name="app_name">Morse Expert</string>
     <string name="idle">Idle</string>
     <string name="waterfall_display">Waterfall display</string>
     <string name="frequency_scale">Frequency scale</string>