webui: fixes for machines endpoint

- fix machines settings file location
- raise 404 if machine doesn't exist
- improve machine api test

pkgs/clan-cli/tests/test_api_machines.py

@@ -22,9 +22,28 @@ def test_machines(api: TestClient, clan_flake: Path) -> None:
 
 
 def test_configure_machine(api: TestClient, machine_flake: Path) -> None:
+    # ensure error 404 if machine does not exist when accessing the config
+    response = api.get("/api/machines/machine1/config")
+    assert response.status_code == 404
+
+    # ensure error 404 if machine does not exist when writing to the config
+    response = api.put("/api/machines/machine1/config", json={})
+    assert response.status_code == 404
+
+    # create the machine
+    response = api.post("/api/machines", json={"name": "machine1"})
+    assert response.status_code == 201
+
+    # ensure an empty config is returned by default for a new machine
     response = api.get("/api/machines/machine1/config")
     assert response.status_code == 200
-    assert response.json() == {"config": dict()}
+    assert response.json() == {"config": {}}
+
+    # get jsonschema for machine
+    response = api.get("/api/machines/machine1/schema")
+    assert response.status_code == 200
+    json_response = response.json()
+    assert "schema" in json_response and "properties" in json_response["schema"]
 
     # set some config
     response = api.put(