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/core/ui/bank_grid.h

@@ -1,7 +1,7 @@
 #pragma once
 #include "core/ui/rect.h"
 // bank_grid — the REAPER-free layout math and cache-key logic behind the docked
-// bank_panel (M5, Wave A). The panel shell (bank_panel.cpp) owns the SWELL window,
+// bank_panel (M5, Wave A). The panel shell (shell/panel/) owns the SWELL window,
 // LICE drawing, and PCM reads; ALL of that is REAPER-bound and DAW-verified. What
 // is NOT DAW-bound — how N sample cells tile a panel of a given pixel size, and
 // the key that identifies a cached thumbnail — lives here so it is unit-tested
@@ -80,7 +80,7 @@ std::string thumbnailKeyString(const ThumbnailKey& key);
 // --- Interaction (M5 Wave B): hit-test, selection, keyboard nav --------------
 //
 // All REAPER-free so the panel's interaction LOGIC is unit-tested outside the DAW,
-// exactly as the layout math is. The panel shell (bank_panel.cpp) reads live mouse
+// exactly as the layout math is. The panel shell (shell/panel/) reads live mouse
 // coordinates / key codes / modifier state via SWELL and calls into these; it owns
 // no selection arithmetic of its own.