feat: While importing ADIF, update MY fields

internal/cwdecode/cwdecode_test.go

@@ -138,6 +138,50 @@ func TestDecodeFirstCharStrong(t *testing.T) {
 	}
 }
 
+func TestDecodeWithAmplitudeRipple(t *testing.T) {
+	const fs = 16000
+	// A real signal's tone amplitude wobbles within a mark; if the floor chases
+	// it, dashes fragment into dots ("all dots" garbage). Apply ±30% ripple.
+	samples := keyMessageAmp("CQ TEST DE OM", fs, 24, 800, 10000)
+	rp := 0.0
+	for i := range samples {
+		rp += 2 * math.Pi * 35 / float64(fs) // 35 Hz amplitude wobble
+		samples[i] = int16(float64(samples[i]) * (1 + 0.3*math.Sin(rp)))
+	}
+	var sb strings.Builder
+	d := New(fs, func(s string) { sb.WriteString(s) }, nil)
+	for i := 0; i < len(samples); i += 256 {
+		end := i + 256
+		if end > len(samples) {
+			end = len(samples)
+		}
+		d.Process(samples[i:end])
+	}
+	got := strings.ToUpper(sb.String())
+	if !strings.Contains(got, "TEST DE OM") {
+		t.Fatalf("dashes fragmented under amplitude ripple: decoded %q", got)
+	}
+}
+
+func TestDecodeCQFixedPitch(t *testing.T) {
+	const fs = 16000
+	var sb strings.Builder
+	d := New(fs, func(s string) { sb.WriteString(s) }, nil)
+	d.SetTarget(700) // fixed pitch like the user's manual override
+	samples := keyMessageAmp("CQ CQ CQ DE OM", fs, 26, 700, 9000)
+	for i := 0; i < len(samples); i += 200 {
+		end := i + 200
+		if end > len(samples) {
+			end = len(samples)
+		}
+		d.Process(samples[i:end])
+	}
+	got := strings.ToUpper(sb.String())
+	if n := strings.Count(got, "CQ"); n < 2 {
+		t.Fatalf("first element of CQ dropped: decoded %q (only %d CQ)", got, n)
+	}
+}
+
 func TestDecodeNumbersAndProsign(t *testing.T) {
 	const fs = 16000
 	var sb strings.Builder