Design View: no undo block may open over the reclaim span, and a reapply closes none

Every opener ends the span first, so a tag fired mid-drain no longer hijacks the
switch's point. One stated criterion governs both lane sites; no-op actions discard.

src/shell/view/view_park.cpp

@@ -144,7 +144,6 @@ TrackParkResult parkTrack(ViewModeModel& model, const std::string& guid, MediaTr
             snap.fxKeying  = prior->fxKeying;
         }
         model.storeSnapshot(guid, snap);
-        result.wrote = true;
     }
 
     if (applyFlags(tr, flags)) result.wrote = true;
@@ -153,9 +152,9 @@ TrackParkResult parkTrack(ViewModeModel& model, const std::string& guid, MediaTr
 
 bool restoreTrack(ViewModeModel& model, const std::string& guid, MediaTrack* tr,
                   const std::vector<TrackFlagOp>& flags) {
-    applyFlags(tr, flags);
+    const bool wrote = applyFlags(tr, flags);
     model.releaseSnapshotFlags(guid);
-    return true;
+    return wrote;
 }
 
 std::string trackDisplayName(MediaTrack* tr) {