Q-W6: registration table (OCP) in main.cpp; bank verbs -> shell/bank_ops(Session&); persist.h + wav_trim + namespaces.h shims deleted; 61/61

capture.h realtime seam split to capture_realtime_shell.h; GetProjExtState grow-loop rehomed to core/wire/ext_state_read; stale persist.cpp/bank_panel.cpp comment refs fixed; CLAUDE.md persist/bank_book/actions bullets updated. Command-id suffixes, display phrases, and undo labels byte-identical.

tests/test_bridge_marshal.cpp

@@ -6,13 +6,15 @@
 // Covers: decodeGetProjExtState hit/absent/zero-return/empty-buffer (the stale-buffer
 // guard). The S1 spike's extractJsonStringField string-scan reader was retired in S4
 // (the instrument now parses the bank through the shared bank_book JSON path), so its
-// cases are gone with it. Q-W5 (rider T2-04) adds readProjExtStateGrowing — the ONE
-// grow-loop retry policy shared by persist / usage_scan / reaper_bridge — covered
+// cases are gone with it. Q-W5 (rider T2-04) added readProjExtStateGrowing — the ONE
+// grow-loop retry policy shared by persist / usage_scan / reaper_bridge, rehomed to
+// core/wire/ext_state_read.h in Q-W6 and still pinned here alongside the decode — covered
 // against a fake read: absent, small-fit, grow-then-fit, empty-complete (composed with
 // the decode guard), and the 16 MB overflow give-up. The overflow case is
 // prune-safety-adjacent (usage_scan folds it to abortPrune), so it is pinned here.
 
 #include "../src/core/instrument/map/bridge_marshal.h"
+#include "../src/core/wire/ext_state_read.h"  // readProjExtStateGrowing (Q-W6 rehome)
 
 #include <cstdio>
 #include <cstring>
@@ -20,6 +22,7 @@
 
 using namespace reasampler;
 using namespace reasampler::instrument::map;
+using namespace reasampler::wire;
 
 static int g_fail = 0;
 #define CHECK(cond) do { if(!(cond)) { \