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_peaks.cpp

@@ -11,13 +11,14 @@
 // merge, steep disjoint-span merge, no-bin-dropped spike sweep, no-column-empty
 // coverage, col clamp, degenerate inputs.
 
-#include "../src/peaks.h"
+#include "../src/core/audio/peaks.h"
 
 #include <cmath>
 #include <cstdio>
 #include <vector>
 
 using namespace reasampler;
+using namespace reasampler::audio;
 
 static int g_fail = 0;
 #define CHECK(cond) do { if(!(cond)) { \