Refactor LED control UI to Vue3

tests/test_sync.py

@@ -33,6 +33,38 @@ def test_sync_coordinator_marks_command_complete_after_both_tiles_ack():
     assert coordinator.status()["commands"][0]["complete"]
 
 
+def test_sync_coordinator_releases_scene_commit_after_both_tiles_prepare():
+    coordinator = SyncCoordinator(["left", "right"], command_ttl_seconds=30)
+    message = CommandEnvelope(
+        type=CommandType.COMMIT_SCENE,
+        payload={"apply_at_ms": 2000, "state": {"active_scene_id": "overview"}},
+    )
+    coordinator.register_command(message, message.payload)
+
+    coordinator.ack(
+        {
+            "command_id": message.command_id,
+            "node_id": "left-node",
+            "tile_id": "left",
+            "status": "prepared",
+        }
+    )
+    assert coordinator.release_if_prepared(message.command_id) is None
+
+    coordinator.ack(
+        {
+            "command_id": message.command_id,
+            "node_id": "right-node",
+            "tile_id": "right",
+            "status": "prepared",
+        }
+    )
+    released = coordinator.release_if_prepared(message.command_id)
+    assert released is not None
+    assert released.released_at_ms is not None
+    assert coordinator.release_if_prepared(message.command_id) is None
+
+
 def test_sync_coordinator_tracks_node_clock_and_frame_metrics():
     coordinator = SyncCoordinator(["left", "right"], command_ttl_seconds=30)
     coordinator.connect_node(node_id="left-node", tile_id="left", app_version="test")