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.

src/shell/capture/provenance_shell.h

@@ -1,5 +1,4 @@
 #pragma once
-#include "core/namespaces.h"
 // provenance_shell — the REAPER-facing reads Milestone 10 needs, in one place.
 //
 // The PURE provenance module (provenance.h) owns the fingerprint encoding, the
@@ -29,6 +28,9 @@ namespace reasampler {
 
 class BankBook;
 
+// Real-namespace-home using-declaration (Q-W6: the namespaces.h shim is retired).
+using model::BankFileRef;
+
 // The in-scope FX-chain identity of a source track (Track scope), folded to the
 // pure provenance string. Reads the track's own FX chain via TrackFX_GetCount /
 // TrackFX_GetFXName / TrackFX_GetFXGUID / TrackFX_GetEnabled in chain order.