Γ-W1-T2: the published GR meter reads the limiter, not the mute

Retire the effectiveGain blend so the meter's minimum tracks smoothGain's own
reduction against real input, unscaled by the transition mute — a toggle over
quiet material now reads no reduction instead of pinning to 0.

src/core/instrument/engine/limiter.cpp

@@ -197,8 +197,10 @@ float Limiter::process(float* left, float* right, int frames) {
             left[i] = 0.f;
             if (stereo) right[i] = 0.f;
         }
-        const float effectiveGain = s >= 1.f ? gain : s * gain;
-        if (effectiveGain < blockMin) blockMin = effectiveGain;
+        // `gain` is the limiter's own reduction, computed from the real input this sample
+        // whether or not the mute is currently scaling it toward silence — publishing it
+        // unscaled is what lets the meter show "really limiting" and not "just muting".
+        if (gain < blockMin) blockMin = gain;
 
         // A disengage is tested FIRST so a toggle-off arriving mid-engage abandons the prime
         // instead of waiting it out in silence.

src/core/instrument/engine/limiter.h

@@ -79,10 +79,12 @@ public:
     bool enabled() const { return target_.load(std::memory_order_relaxed); }
 
     // Applies the limiter in place over `frames` of `left` (and `right`, which may be null for
-    // a mono buffer). Returns the SMALLEST gain actually applied to the output this block — 1.0
-    // for a settled bypass, 0.0 anywhere the transition mute is at silence. The transition mute
-    // counts because the contract is the gain that REACHED the output: the reported value and
-    // the signal are scaled by the same factor, or the meter and the bus disagree.
+    // a mono buffer). Returns the SMALLEST gain the LIMITER ITSELF computed this block —
+    // smoothGain's output against the real input, at every sample including a muted one — NOT
+    // scaled by the transition mute. The mute is a switch, not limiting: scaling by it would
+    // report 0.0 (full reduction) on every toggle regardless of program content, which is a
+    // meter defect, not a fact about the bus. 1.0 means no detected peak exceeded the ceiling,
+    // whether settled bypassed or mid-mute over quiet material.
     float process(float* left, float* right, int frames);
 
 private:

src/shell/instrument/reasampler_processor.h

@@ -40,7 +40,10 @@ class ReaSamplerEmbed;  // embedded TCP/MCP UI shell (owned below; see queryInte
 struct MasterBusMeter {
     float peakL = 0.f;     // max |x| this block
     float peakR = 0.f;
-    float minGain = 1.f;   // smallest limiter gain applied this block; 1 = no reduction
+    // Smallest gain the LIMITER computed this block (Limiter::process) — deliberately NOT
+    // scaled by the transition mute, so a toggle over quiet material reads 1 (no reduction)
+    // rather than the mute's own weight. 1 = no reduction.
+    float minGain = 1.f;
     bool clip = false;     // LATCHED at a block peak >= 0 dBFS; only clearMasterBusClip lowers it
 };