fix S11 review: extract upsertPickedOverride, restore map_ on drag-cancel, clamp start to frames-1, pin startFrame>loopEnd wrap test

src/vst/reasampler_editor.h

@@ -135,6 +135,11 @@ private:
     // (upsert on the picked id — mirror of the root-marker path), then reload off-thread.
     void commitPickedMarkers(const SetupMarkers& m);
 
+    // Write `m` as a loop/start override upsert into map_ for selectedId_ (find-or-append).
+    // Does NOT call commitAndReload — callers decide whether this is a live-drag update or a
+    // final commit. selectedId_ must be non-empty before calling.
+    void upsertPickedOverride(const SetupMarkers& m);
+
     ReaSamplerProcessor* processor_ = nullptr;
 
     // --- Snapshot of the live bank (drawn each paint; refreshed off the audio thread) ---
@@ -155,6 +160,7 @@ private:
     int dragStartLow_ = 0;                // the grabbed field's note at grab time
     int dragStartHigh_ = 0;
     int dragStartRoot_ = 60;
+    PerformanceMap dragStartMap_;         // map_ snapshotted at grab; restored on capture-loss
 
     // S11 waveform-marker drag: which marker + the marker set snapshotted at grab time (so the
     // pixel-delta resolver shifts the grabbed frame from its grab-time value, and inter-marker