some fixes

python_app/workflows/multi_radar_capture_workflow.py

@@ -313,6 +313,15 @@ class MultiRadarSequentialCaptureSession:
         """Return completed combo batches in capture order."""
         return list(self._captured_batches)
 
+    def traces_for_radar_key(self, radar_key: str) -> list[TraceData]:
+        """Return every captured trace (one per combo) for one radar variant.
+
+        Unlike a batch's ``traces`` (one entry per variant, holding only the
+        preview trace), this returns the full per-combo set, so matrix radars
+        expose all ports rather than just the last one.
+        """
+        return list(self._traces_by_radar_key.get(radar_key, []))
+
     def radar_variant_count(self) -> int:
         """Return how many radar variants are captured per combo."""
         return len(self._radar_variants)