Expose per-beat H3 clip outputs

tests/test_dumas_h3_longvideos.py

@@ -276,6 +276,16 @@ class DumasH3LongVideosHelperTests(unittest.TestCase):
         for index in range(1, 10):
             self.assertIn(f"ref_{index}", optional)
 
+    def test_node_appends_per_beat_list_outputs_without_reordering_existing_slots(self):
+        self.assertEqual(
+            self.module.H3LongVideos.RETURN_NAMES[-2:],
+            ("beat_images", "beat_audio"),
+        )
+        self.assertEqual(
+            self.module.H3LongVideos.OUTPUT_IS_LIST[-2:],
+            (True, True),
+        )
+
     def test_reference_context_matches_character_names_and_location_tags(self):
         refs = [
             {"kind": "character", "image": "img1", "name": "Mara", "description": "silver hair", "wardrobe": "red jacket"},
@@ -456,6 +466,7 @@ class DumasH3LongVideosHelperTests(unittest.TestCase):
             )
             self.assertIn("2 beat(s)", result[2])
             self.assertIn("2 shot(s)", result[2])
+            self.assertEqual(result[-2:], ([], []))
         finally:
             module.torch = original_torch
             module.vram_gb = original_vram_gb