Fixed failing tests in machines and history cli, removed test_machines_api.py

pkgs/clan-cli/clan_cli/flakes/inspect.py

@@ -5,6 +5,7 @@ from dataclasses import dataclass
 from pathlib import Path
 
 from ..errors import ClanError
+from ..machines.list import list_machines
 from ..nix import nix_config, nix_eval, nix_metadata
 
 
@@ -24,6 +25,12 @@ def inspect_flake(flake_url: str | Path, flake_attr: str) -> FlakeConfig:
     config = nix_config()
     system = config["system"]
 
+    machines = list_machines(flake_url)
+    if flake_attr not in machines:
+        raise ClanError(
+            f"Machine {flake_attr} not found in {flake_url}. Available machines: {', '.join(machines)}"
+        )
+
     cmd = nix_eval(
         [
             f'{flake_url}#clanInternals.machines."{system}"."{flake_attr}".config.clanCore.clanIcon'