Merge dev into phase-b-multibank (integrate parallel M7/8 + Phase D work before dev promotion)

# Conflicts:
#	CLAUDE.md
#	CMakeLists.txt
#	src/actions.cpp
#	src/bank_panel.cpp
#	src/persist.h

src/bank_panel.h

@@ -65,6 +65,17 @@ std::string bankPanelSelectedSourceBankId();
 // reflected without the panel diffing the bank itself.
 void bankPanelRefresh();
 
+// Notifies the panel that persist just (re)loaded a project's view model (membership +
+// active mode). main.cpp calls this on the exact tick it drains persist's load signal
+// and reapplies the active mode. It re-arms the new-content detector so the just-loaded
+// project's PRE-EXISTING content is taken as the baseline (reported as nothing new),
+// never diffed against the previously-open project and mass-tagged into the active mode.
+// This coordinates the detector's project-identity signal with persist's authoritative
+// (GUID-primary) one — the two can no longer diverge on a recycled ReaProject* address,
+// which is what caused a project opened in Design to mis-tag its Arrange tracks. READ/
+// arm of panel state only; no project or bank mutation.
+void bankPanelNotifyProjectLoaded();
+
 // The panel's current tail-mode setting (mode + Manual length), read by the plain
 // CAPTURE_ITEM / CAPTURE_TRACK actions when building a CaptureRequest so a capture
 // applies whatever the panel toggle is set to. Default None (exact bounds) — a