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/capture/tail_control.h

@@ -1,6 +1,6 @@
 #pragma once
 // tail_control — the REAPER-free logic behind the docked bank_panel's tail-mode
-// toggle. The panel shell (bank_panel.cpp) owns the SWELL window, LICE drawing, and
+// toggle. The panel shell (shell/panel/) owns the SWELL window, LICE drawing, and
 // click hit-testing; what is NOT DAW-bound — the cycle order, the manual-length
 // clamp, and the toggle's label text — lives here so it is unit-tested outside the
 // DAW (CLAUDE.md §load-bearing split). Mirror of bank_grid / mode_switch.
@@ -27,7 +27,7 @@ inline constexpr double kDefaultManualTailMs = 2000.0;
 inline constexpr double kManualStepMs = 250.0;
 
 // The panel's current tail setting: the mode plus the length used ONLY when the
-// mode is Manual. Held as in-memory panel/session state (bank_panel.cpp), default
+// mode is Manual. Held as in-memory panel/session state (shell/panel), default
 // None so a capture with no explicit choice stays exact-bounds / byte-identical to
 // today. `manualMs` is a stored default a future fine-adjust UI can tune; it is
 // clamped to the 8 s cap (kMaxTailMs) before it ever reaches a CaptureRequest.