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/i3/a.java

@@ -0,0 +1,41 @@
+package i3;
+
+/* loaded from: classes.dex */
+public final class a implements Runnable {
+    public final /* synthetic */ int f;
+
+    /* renamed from: g, reason: collision with root package name */
+    public final /* synthetic */ int f11686g;
+
+    /* renamed from: h, reason: collision with root package name */
+    public final /* synthetic */ int f11687h;
+
+    /* renamed from: i, reason: collision with root package name */
+    public final /* synthetic */ float[] f11688i;
+
+    /* renamed from: j, reason: collision with root package name */
+    public final /* synthetic */ float[] f11689j;
+
+    /* renamed from: k, reason: collision with root package name */
+    public final /* synthetic */ d f11690k;
+
+    public a(d dVar, int i4, int i5, int i6, float[] fArr, float[] fArr2) {
+        this.f11690k = dVar;
+        this.f = i4;
+        this.f11686g = i5;
+        this.f11687h = i6;
+        this.f11688i = fArr;
+        this.f11689j = fArr2;
+    }
+
+    @Override // java.lang.Runnable
+    public final void run() {
+        int i4 = this.f11686g;
+        int i5 = this.f;
+        if (i5 >= i4) {
+            return;
+        }
+        float f = this.f11689j[this.f11687h + i5];
+        throw null;
+    }
+}

feature/cw/src/main/java/i3/b.java

@@ -0,0 +1,41 @@
+package i3;
+
+/* loaded from: classes.dex */
+public final class b implements Runnable {
+    public final /* synthetic */ long f;
+
+    /* renamed from: g, reason: collision with root package name */
+    public final /* synthetic */ long f11691g;
+
+    /* renamed from: h, reason: collision with root package name */
+    public final /* synthetic */ long f11692h;
+
+    /* renamed from: i, reason: collision with root package name */
+    public final /* synthetic */ k3.d f11693i;
+
+    /* renamed from: j, reason: collision with root package name */
+    public final /* synthetic */ k3.d f11694j;
+
+    /* renamed from: k, reason: collision with root package name */
+    public final /* synthetic */ d f11695k;
+
+    public b(d dVar, long j4, long j5, long j6, k3.d dVar2, k3.d dVar3) {
+        this.f11695k = dVar;
+        this.f = j4;
+        this.f11691g = j5;
+        this.f11692h = j6;
+        this.f11693i = dVar2;
+        this.f11694j = dVar3;
+    }
+
+    @Override // java.lang.Runnable
+    public final void run() {
+        long j4 = this.f11691g;
+        long j5 = this.f;
+        if (j5 >= j4) {
+            return;
+        }
+        this.f11694j.b(this.f11692h + j5);
+        throw null;
+    }
+}

feature/cw/src/main/java/i3/c.java

@@ -0,0 +1,55 @@
+package i3;
+
+import k3.g;
+import k3.s;
+
+/* loaded from: classes.dex */
+public final class c implements Runnable {
+    public final /* synthetic */ int f = 1;
+
+    /* renamed from: g, reason: collision with root package name */
+    public final /* synthetic */ long f11696g;
+
+    /* renamed from: h, reason: collision with root package name */
+    public final /* synthetic */ long f11697h;
+
+    /* renamed from: i, reason: collision with root package name */
+    public final /* synthetic */ g f11698i;
+
+    /* renamed from: j, reason: collision with root package name */
+    public final /* synthetic */ Object f11699j;
+
+    public c(long j4, long j5, s sVar, s sVar2) {
+        this.f11696g = j4;
+        this.f11697h = j5;
+        this.f11698i = sVar;
+        this.f11699j = sVar2;
+    }
+
+    @Override // java.lang.Runnable
+    public final void run() {
+        switch (this.f) {
+            case 0:
+                k3.d dVar = (k3.d) this.f11698i;
+                long j4 = this.f11697h;
+                long j5 = this.f11696g;
+                if (j5 >= j4) {
+                    return;
+                }
+                dVar.b(j5 * 2);
+                throw null;
+            default:
+                for (long j6 = this.f11696g; j6 < this.f11697h; j6++) {
+                    ((s) this.f11698i).c(j6, ((s) this.f11699j).b(j6));
+                }
+                return;
+        }
+    }
+
+    public c(d dVar, long j4, long j5, k3.d dVar2) {
+        this.f11699j = dVar;
+        this.f11696g = j4;
+        this.f11697h = j5;
+        this.f11698i = dVar2;
+    }
+}