fix(nlma): restore original Igorad cycle zone numerator (i-phase+1)

The cycle zone t parameter must use (i-phase+1) per original MQL4 NonLagMA v7.1.

Using (i-phase) eliminated the intentional discontinuity at the phase/cycle boundary, producing incorrect kernel weights visible in the signature SVG.

lib/trends_FIR/nlma/Nlma.cs

@@ -228,7 +228,7 @@ public sealed class Nlma : AbstractBase
     /// <summary>
     /// Computes original Igorad two-phase kernel weights.
     /// Phase zone (i=0..period-2): t = i/(period-2), g = t≤0.5 ? 1 : 1/(3πt+1), w = g*cos(πt)
-    /// Cycle zone (i=period-1..flen-2): t = 1 + (i-phase)*(2*Cycle-1)/(Cycle*period-1), same g/w
+    /// Cycle zone (i=period-1..flen-2): t = 1 + (i-phase+1)*(2*Cycle-1)/(Cycle*period-1), same g/w
     /// Last tap (i=flen-1): weight = 0.
     /// weights[0] = newest bar, weights[flen-1] = oldest bar.
     /// Returns the signed weight sum for normalization.
@@ -263,7 +263,7 @@ public sealed class Nlma : AbstractBase
                 else
                 {
                     // Cycle zone: t continues from 1 upward
-                    double numer = (double)(i - phase) * (2 * Cycle - 1);
+                    double numer = (double)(i - phase + 1) * (2 * Cycle - 1);
                     double denom = (double)(Cycle * period - 1);
                     t = 1.0 + (denom > 0 ? numer / denom : 0.0);
                 }

lib/trends_FIR/nlma/Nlma.md

@@ -150,7 +150,7 @@ for i = 0 to flen-1:
     if i <= Phase - 1:
         t = i / (Phase - 1)
     else:
-        t = 1 + (i - Phase + 1) * (2*Cycle - 1) / (Cycle * period - 1)
+        t = 1.0 + (i - Phase + 1) * (2*Cycle - 1) / (Cycle * period - 1)
 
     if t <= 0.5:
         g = 1.0

lib/trends_FIR/nlma/nlma.pine

@@ -43,7 +43,7 @@ nlma(series float source, simple int period) =>
                 t := phase > 1 ? float(i) / float(phase - 1) : 0.0
             else
                 // Cycle zone: t continues from 1 upward
-                float numer = float(i - phase) * float(2 * cycle - 1)
+                float numer = float(i - phase + 1) * float(2 * cycle - 1)
                 float denom = float(cycle * period - 1)
                 t := 1.0 + (denom > 0 ? numer / denom : 0.0)