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/shell/panel/panel_layout.cpp

@@ -217,7 +217,7 @@ std::string activeModeIdOrEmpty() {
 
 // The BOTTOM toolbar inventory (L5 refinement 3): FOUR Item/Track x Arrange/Design tag buttons
 // then a set-apart Show Both. The suffixes are the ACTUAL registered command-id strings from
-// actions.cpp (VIEW_MOVE_ITEMS_ARRANGE / VIEW_MOVE_ITEMS_DESIGN for the item moves;
+// design_view_actions.cpp (VIEW_MOVE_ITEMS_ARRANGE / VIEW_MOVE_ITEMS_DESIGN for the item moves;
 // VIEW_TAG_ARRANGE / VIEW_TAG_DESIGN for the track tags; VIEW_SHOW_BOTH) — grepped, not
 // paraphrased. "…: Arrange" routes through the untag/arrange path (Arrange = absence of a tag).
 // The Toggle + both Activate buttons are REMOVED (L5 refinement 4 / settled inventory): the