docs: simplify demo to SPEED and BIM-VFI

tests/test_demo_workflow.py

@@ -0,0 +1,53 @@
+import json
+from pathlib import Path
+
+
+WORKFLOW_PATH = (
+    Path(__file__).resolve().parents[1]
+    / "example_workflows"
+    / "tween_speed_bim_model_lab.json"
+)
+
+
+def _workflow():
+    return json.loads(WORKFLOW_PATH.read_text(encoding="utf-8"))
+
+
+def test_speed_bim_demo_is_clean_and_current():
+    workflow = _workflow()
+    node_types = [node["type"] for node in workflow["nodes"]]
+
+    assert "Note" not in node_types
+    assert not any("LDF" in node_type for node_type in node_types)
+    assert node_types.count("SPEEDVFIInterpolate") == 1
+    assert node_types.count("BIMVFIInterpolate") == 1
+    assert [group["title"] for group in workflow["groups"]] == [
+        "INPUT · 24 FPS / 25 FRAMES",
+        "SPEED",
+        "BIM-VFI",
+    ]
+
+
+def test_speed_bim_demo_links_are_internally_consistent():
+    workflow = _workflow()
+    nodes = {node["id"]: node for node in workflow["nodes"]}
+    node_ids = set(nodes)
+    links = {link[0]: link for link in workflow["links"]}
+
+    assert workflow["last_node_id"] == max(node_ids)
+    assert workflow["last_link_id"] == max(links)
+
+    for link_id, source_id, source_slot, target_id, target_slot, _ in workflow["links"]:
+        assert link_id in links
+        assert source_id in node_ids
+        assert target_id in node_ids
+        assert link_id in nodes[source_id]["outputs"][source_slot]["links"]
+        assert nodes[target_id]["inputs"][target_slot]["link"] == link_id
+
+    for node in workflow["nodes"]:
+        for input_slot in node.get("inputs", []):
+            if input_slot.get("link") is not None:
+                assert input_slot["link"] in links
+        for output_slot in node.get("outputs", []):
+            for link_id in output_slot.get("links") or []:
+                assert link_id in links