Q-W4: split actions.cpp into design_view_actions/bank_actions/prune_action + shared action_registry; bank verbs deduped into promptless bankOp* inner verbs in panel_bank_ops (one mutation home, two UX skins); command-id strings byte-identical; actions.h shim carrier retired

src/core/model/provenance.h

@@ -2,7 +2,7 @@
 // provenance — the REAPER-free core behind Milestone 10 (re-capture from source).
 //
 // PURE MODULE (CLAUDE.md §load-bearing split): NO REAPER types, NO SWELL, NO
-// vendor/ includes. Standard library only. The shell (main.cpp / actions.cpp)
+// vendor/ includes. Standard library only. The shell (main.cpp / the action families)
 // gathers the raw inputs from REAPER — the source item media-file names, the
 // source track FX-chain identity (names / GUIDs / enabled flags), the exact
 // capture range, scope, tail — and hands plain strings/values here. This module