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/instrument/map/sample_map.h

@@ -3,7 +3,7 @@
 // "reasampler" bank ext-state + a decoded WAV into the plain data the sampler core
 // plays, and (de)serialize the instance's selected-sample choice for VST3 component
 // state. NO VST3, NO REAPER, NO SWELL, NO vendor/ includes at the boundary — the
-// mirror of capture_paths / wav_trim / bridge_marshal splitting the fiddly, testable
+// mirror of capture_paths / wav_codec / bridge_marshal splitting the fiddly, testable
 // arithmetic out of a host-facing shell.
 //
 // WHY IT EXISTS (S4 seams). The instrument reads the bank over the live-state seam
@@ -14,7 +14,7 @@
 // downmix its decoded PCM to the core's mono contract, and build the Tier-0 chromatic
 // Keymap — is pure and unit-tested here.
 //
-// It links bank_book (the shared BankBook::deserialize) and wav_trim (the shared
+// It links bank_book (the shared BankBook::deserialize) and wav_codec (the shared
 // 32-bit-float WAV parse — no third WAV reader) and sampler_core (the Keymap /
 // SampleData it produces). All three are pure; this stays pure.
 
@@ -25,7 +25,7 @@
 
 #include "core/model/bank_book.h"       // BankBook::deserialize (shared bank JSON parse)
 #include "core/instrument/engine/sampler_core.h"    // Keymap, SampleData, SampleLoop
-#include "core/capture/wav_trim.h"        // parseWavLayout, extractFloatFrames (shared WAV parse)
+#include "core/capture/wav_codec.h"        // parseWavLayout, extractFloatFrames (shared WAV parse)
 
 namespace reasampler::instrument::map {
 
@@ -167,7 +167,7 @@ struct BankChoice {
 };
 std::vector<BankChoice> listBanks(const std::string& banksJson);
 
-// Downmix interleaved float frames (the shape wav_trim::extractFloatFrames yields:
+// Downmix interleaved float frames (the shape wav_codec's extractFloatFrames yields:
 // [f0c0,f0c1,...,f1c0,...]) to the core's MONO contract by AVERAGING channels per
 // frame. `channelCount` is the interleave stride (>= 1). CHANNEL POLICY (Tier 0,
 // documented + surfaced): the S3 core is mono-per-sample by design; bank WAVs preserve