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_guid_diff.cpp

@@ -10,7 +10,7 @@
 //  5. reset() (project switch) re-arms the first-poll guard: the next observe()
 //     re-baselines and reports nothing new — never diffs across projects.
 
-#include "../src/guid_diff.h"
+#include "../src/core/view/guid_diff.h"
 
 #include <cstdio>
 #include <set>
@@ -18,6 +18,7 @@
 #include <vector>
 
 using namespace reasampler;
+using namespace reasampler::view;
 
 static int g_fail = 0;
 #define CHECK(cond) do { if(!(cond)) { \