Convert /-/actions.json from top-level array to object

/-/actions.json now returns {"ok": true, "actions": [...]} instead of a
bare JSON array, so the response can grow additional keys without a
breaking change. The debug_actions.html template reads data.actions,
and the endpoint is now documented in docs/introspection.rst.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GrHZSypDfMnym1tM5XJAFZ

tests/test_api.py

@@ -579,7 +579,7 @@ async def test_actions_json(ds_client):
     try:
         ds_client.ds.root_enabled = True
         response = await ds_client.get("/-/actions.json", actor={"id": "root"})
-        data = response.json()
+        data = response.json()["actions"]
     finally:
         ds_client.ds.root_enabled = original_root_enabled
     assert isinstance(data, list)

tests/test_success_envelope.py

@@ -101,3 +101,14 @@ async def test_databases_json_is_object(ds_client):
     assert data["ok"] is True
     assert isinstance(data["databases"], list)
     assert "fixtures" in {db["name"] for db in data["databases"]}
+
+
+@pytest.mark.asyncio
+async def test_actions_json_is_object(ds_envelope):
+    response = await ds_envelope.client.get("/-/actions.json", actor={"id": "root"})
+    assert response.status_code == 200
+    data = response.json()
+    assert set(data.keys()) == {"ok", "actions"}
+    assert data["ok"] is True
+    assert isinstance(data["actions"], list)
+    assert "view-instance" in {action["name"] for action in data["actions"]}