Merge branch 'main' into claude/silly-lederberg-231f6c

Conflicted only on the README feature list, where main's list_cargo()
bullet and this branch's bridge bullet were added at the same spot. Kept
both: list_cargo() with the other cargo queries, and the bridge one last,
since it is about what all of them run against.

list_cargo() landing also makes tests/test_gamescript.py's command check
meaningful in the other direction -- the bridge has answered list_cargo
all along with nothing sending it, which is exactly the asymmetry that
check tolerates on purpose.

Co-Authored-By: Claude <[email protected]>

tests/test_admin.py

@@ -393,6 +393,40 @@ async def test_admin_get_station_cargo_error_response():
         await task
     assert client._gs_futures == {}
 
+@pytest.mark.asyncio
+async def test_admin_list_cargo_request_and_response():
+    client = OpenTTDAdminClient("127.0.0.1", port=3977, admin_name="TestAdmin")
+    proto = MockProtocol()
+    client._protocol = proto
+    client._transport = MockTransport()
+
+    task = asyncio.ensure_future(client.list_cargo())
+    await asyncio.sleep(0)  # let the task send the request
+
+    # First use auto-subscribes to Gamescript updates, then sends the query.
+    assert len(proto.sent) == 2
+    assert proto.sent[0][2] == PacketAdminType.AdminUpdateFrequency
+    assert decode_gamescript_payload(proto.sent[1]) == {
+        "command": "list_cargo", "request_id": 1,
+    }
+
+    response = {"command": "list_cargo", "request_id": 1,
+                "cargo": [{"cargo_id": 0, "label": "PASS", "freight": 0},
+                          {"cargo_id": 1, "label": "COAL", "freight": 1}]}
+    await client.receive_ServerGamescript(None, data=response)
+    assert await task == response
+    assert client._gs_futures == {}
+
+@pytest.mark.asyncio
+async def test_admin_list_cargo_timeout():
+    client = OpenTTDAdminClient("127.0.0.1", port=3977, admin_name="TestAdmin")
+    client._protocol = MockProtocol()
+    client._transport = MockTransport()
+
+    with pytest.raises(asyncio.TimeoutError):
+        await client.list_cargo(timeout=0.05)
+    assert client._gs_futures == {}
+
 @pytest.mark.asyncio
 async def test_admin_get_dispatch_request_and_response():
     client = OpenTTDAdminClient("127.0.0.1", port=3977, admin_name="TestAdmin")