Merge dev into ux-w1-t1-sample-rate: take the spline live-drag and plugin-drop work

src/shell/instrument/processor_reload.cpp

@@ -164,6 +164,7 @@ std::string ReaSamplerProcessor::reloadInstrument() {
             // top of the first block after this, which is where the swap below becomes visible
             // too — so the new snapshot's first note reads it.
             sample.live = &automationLive_;
+            sample.liveContours = &liveContours_;
             // BEFORE the publish: the publish is what makes the audio thread re-merge, and the
             // merge resolves every held automation stage time against this rate. Stored after,
             // a merge in the window between them would resolve them against the previous
@@ -175,6 +176,10 @@ std::string ReaSamplerProcessor::reloadInstrument() {
                 // publishLiveParams never holds reloadMutex_, so this is the only nesting.
                 std::lock_guard<std::mutex> lp(livePublishMutex_);
                 liveParams_.publish(instrument::engine::foldLive(sample.play, sample.keyTrack));
+                // The model's contours, so a reload-tier contour edit (a point added, deleted or
+                // made hard, a drag's release) reaches the drain's sounding voices too, and a
+                // courier publish from an abandoned gesture cannot outlive the reload.
+                liveContours_.publish(instrument::engine::foldContours(sample.play));
             }
             resolvedId = selId;  // the concrete pick that resolved
         }