Share the K1 live scene template and preserve idle media channels

tests/test_node_k1_bridge.py

@@ -556,3 +556,41 @@ def test_native_node_rrd_opens_no_grpc_listener(monkeypatch):
         subscriber.close()
         subscriber.thread.join(6)
         publisher.close()
+
+
+@pytest.mark.parametrize("replacement", [False, True])
+def test_preview_offer_cannot_cross_acquisition_boundary(replacement):
+    async def run():
+        device = bridge()
+        device.facade.current["acquisition"] = {"acquisition_id": "acq-one", "state": "running"}
+        device.facade.current["source_mode"] = "live"
+
+        class Peers:
+            opened = 0
+            closed = []
+
+            async def offer(self, _):
+                self.opened += 1
+                if replacement:
+                    device.facade.current["acquisition"]["acquisition_id"] = "acq-two"
+                return {"peer_id": "synthetic-peer"}
+
+            async def close(self, identifier):
+                self.closed.append(identifier)
+
+        peers = Peers()
+        sensor = NodeK1Sensor(device, peers)
+        item = project_sensor(device.facade.current, "node-test")
+        command = {
+            "operation_id": "op_" + "a" * 32,
+            "action_id": "offer",
+            "session": {"device_id": item["id"], "session_id": "session-test"},
+            "parameters": {"acquisition_id": "acq-one" if replacement else "acq-old"},
+        }
+        with pytest.raises(ValueError):
+            await sensor.execute(command, "node-test")
+        assert peers.opened == int(replacement)
+        assert peers.closed == (["synthetic-peer"] if replacement else [])
+        assert all(action == "state.read" for action, _ in device.facade.actions)
+
+    asyncio.run(run())