Design View: expose a park-shaped no-record track visible instead of adopting or refusing it

Adopting silently wipes hand repairs or hides untouched tracks forever; refusing was rejected too. EXPOSE hands the track back and self-heals on the next apply.

src/shell/view/view.cpp

@@ -114,6 +114,7 @@ bool applyMode(ViewModeModel& model, const std::string& targetModeId, ReaProject
 
     bool laneModeChanged = false;
     bool wrote = false;  // anything at all this apply changed — see applyMintsUndoPoint
+    std::vector<std::string> exposedNames;  // named while handles are fresh, reported after the block
 
     Undo_BeginBlock2(project);
     {
@@ -133,7 +134,11 @@ bool applyMode(ViewModeModel& model, const std::string& targetModeId, ReaProject
             const std::string& guid = tp.flags.front().guid;
             MediaTrack* tr = resolve(trackByGuid, guid);
             if (!tr) continue;  // stale/deleted GUID — prune
-            if (parkTrack(model, guid, tr, tp.flags)) wrote = true;
+            const TrackParkResult r = parkTrack(model, guid, tr, tp.flags);
+            if (r.wrote) wrote = true;
+            // Named here, not after the block: TrackList_AdjustWindows below can
+            // invalidate the handle.
+            if (r.exposed) exposedNames.push_back(trackDisplayName(tr));
         }
 
         for (const TrackPlan& tp : plan.restore) {
@@ -189,6 +194,10 @@ bool applyMode(ViewModeModel& model, const std::string& targetModeId, ReaProject
     const bool mint = applyMintsUndoPoint(realSwitch, wrote);
     Undo_EndBlock2(project, mint ? undoLabel.c_str() : "", mint ? kViewUndoMask : 0);
 
+    // After the undo block: an EXPOSE report is a console message, not a project
+    // write, and must not join what a Ctrl-Z rolls back.
+    reportExposedTracks(project, exposedNames);
+
     // The tool's own account of what it just left driven — the only one that survives
     // an undo rolling the model back underneath it.
     noteAppliedState(project, model);