Q-W1 pt2: core/shell/app relocation + sub-namespaces; one concrete ui::Rect (LTRB fork retired); slot_map split from bank_book; BankIndex→BankModel; 59/59 green

tests/test_master_gain.cpp

@@ -1,4 +1,4 @@
-// Standalone tests for reasampler::vst::master_gain — no VST3, no REAPER, no framework. Same
+// Standalone tests for reasampler::instrument::engine::master_gain — no VST3, no REAPER, no framework. Same
 // fast assert loop as the sibling pure tests. Assert the FB1 post-mixer gain taper HARD:
 //
 //  * -inf bottom — norm 0 maps to -infinity dB and TRUE ZERO linear (silence, not an epsilon);
@@ -9,13 +9,14 @@
 //  * monotonicity — more norm never means less gain.
 //  * label — "-inf" at the bottom, signed one-decimal dB elsewhere.
 
-#include "../src/vst/master_gain.h"
+#include "../src/core/instrument/engine/master_gain.h"
 
 #include <cmath>
 #include <cstdio>
 #include <cstring>
 
-using namespace reasampler::vst;
+using namespace reasampler;
+using namespace reasampler::instrument::engine;
 
 static int g_fail = 0;
 #define CHECK(cond) do { if(!(cond)) { \