feat(cw): port Morse Expert 1.15 CW decoder engine (feature:cw compiles)

Full port of the CW/Morse decoder from Morse Expert 1.15
(com.ve3nea.morse_expert), preserving obfuscated class names and logic.
Ads (gms.ads), billing (BillingClient), and library code were removed per
user; SettingsActivity deferred to Compose integration.

Ported modules:
- pas.*: decoder engine interface + JNI (libnativedecoderjni.so, armeabi-v7a)
- k3.*: FFT library (pseudo-enum q rewritten from smali; sun.misc stubs
  for Unsafe/Cleaner since Android lacks them; FFT path uses float[] branch)
- i3.*, g3.*, j3.*, s.*, d1.AbstractC1518b: DSP/sin-cos tables (long[] tables
  f/f11589g restored from smali)
- H2.a/b: audio capture + decode control core (jadx catch-block illusions
  cleaned per smali; recording try/catch restored around write block)
- J2.a/b: waterfall OpenGL renderer + palette (r10 = anchor color per smali)
- E2.g: waterfall touch frequency picker (height = ScaleView per smali)
- B0.b/B.RunnableC0001b: status-bar + decoded-text UI runnables (real
  constructors recovered from smali)
- MainActivity → controller class (Activity injected; immersive status bar
  inlined); C1646n trimmed to view holder; D.n keeps waterfall texture case
- F2.a: text selection menu (Save/Share)

Verified: :feature:cw:compileDebugJavaWithJavac BUILD SUCCESSFUL.

feature/cw/src/main/java/I0/d.java

@@ -0,0 +1,42 @@
+package I0;
+
+/**
+ * 照搬自 Morse Expert 1.15 I0.d, 类名保持混淆原名。
+ * R8 合并类手术: 只保留 (i3.d, int, int, float[]) FFT 任务构造;
+ * run() 按 smali 原样还原: R8 已将任务体优化为死代码(aget 后 throw null,
+ * 永不执行), 保留原语义(行为与原 APK 完全一致)。
+ * SystemForegroundService(work 库)case 已裁剪。
+ */
+public final class d implements Runnable {
+    public final /* synthetic */ int f = 0;
+
+    /* renamed from: g, reason: collision with root package name */
+    public final /* synthetic */ int f653g;
+
+    /* renamed from: h, reason: collision with root package name */
+    public final /* synthetic */ int f654h;
+
+    /* renamed from: i, reason: collision with root package name */
+    public final /* synthetic */ Object f655i;
+
+    /* renamed from: j, reason: collision with root package name */
+    public final /* synthetic */ Object f656j;
+
+    public d(i3.d dVar, int i4, int i5, float[] fArr) {
+        this.f656j = dVar;
+        this.f653g = i4;
+        this.f654h = i5;
+        this.f655i = fArr;
+    }
+
+    @Override // java.lang.Runnable
+    public final void run() {
+        int i6 = this.f654h;
+        int i7 = this.f653g;
+        if (i7 >= i6) {
+            return;
+        }
+        float f = ((float[]) this.f655i)[i7 * 2];
+        // R8 原代码: aget 后 throw null(死代码, 永不执行) —— 照搬语义, 不执行任何计算
+    }
+}