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/capture_paths.cpp

@@ -110,7 +110,7 @@ std::string resolveBankFile(const std::string& projectDir,
 
 std::string projectDirOfRpp(const std::string& rppPath) {
     // An unsaved project reports an empty .rpp path; keep it empty so downstream
-    // resolution refuses (no default-location fallback). Mirrors persist.cpp's prior
+    // resolution refuses (no default-location fallback). Mirrors the former persist shell's
     // projectDirOf exactly: parent_path of the .rpp, then normalizeSlashes.
     if (rppPath.empty()) return {};
     std::string dir = std::filesystem::path(rppPath).parent_path().string();