Fix no result

app.py

@@ -715,6 +715,13 @@ def verify(
         loaded["pair_head_loaded"],
     )
 
+    if not track_regions or not source_regions:
+        matched = False
+        track_regions = []
+        source_regions = []
+        if not note:
+            note = "Localization was inconclusive, so the result is treated as no match."
+
     wfig = _plot_waveforms(track_clip, source_clip, track_regions, source_regions, best_score, matched)
     mfig = _plot_mels(track_clip, source_clip, track_regions, source_regions, matched)