fix(docker): surface enumeration failures

tests/unit/test_compose.py

@@ -69,6 +69,19 @@ class TestComposeProjectListing(unittest.TestCase):
             self.assertEqual([], list_active_slugs(warn_on_error=False))
         warn.assert_not_called()
 
+    def test_compose_ls_error_can_be_raised_for_enumeration(self):
+        with mock.patch(
+            "bot_bottle.backend.docker.compose.subprocess.run",
+            return_value=subprocess.CompletedProcess(
+                args=["docker"], returncode=1, stdout="", stderr="no daemon",
+            ),
+        ):
+            with self.assertRaisesRegex(RuntimeError, "no daemon"):
+                list_active_slugs(
+                    warn_on_error=False,
+                    raise_on_error=True,
+                )
+
 
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_docker_enumerate_active.py

@@ -19,9 +19,11 @@ of issue #77 — the dashboard now delegates to this layer.
 
 from __future__ import annotations
 
+import subprocess
 import tempfile
 import unittest
 from pathlib import Path
+from unittest.mock import patch
 
 from tests.unit import use_bottle_root
 from bot_bottle import bottle_state
@@ -72,6 +74,18 @@ class TestParseServicesByProject(unittest.TestCase):
         self.assertEqual({"bot-bottle-dev-abc": {"egress"}}, out)
 
 
+class TestQueryServicesByProject(unittest.TestCase):
+    def test_docker_ps_failure_is_not_an_empty_result(self):
+        with patch(
+            "bot_bottle.backend.docker.enumerate.subprocess.run",
+            return_value=subprocess.CompletedProcess(
+                args=["docker"], returncode=1, stdout="", stderr="daemon down",
+            ),
+        ):
+            with self.assertRaisesRegex(RuntimeError, "daemon down"):
+                _enumerate._query_services_by_project()
+
+
 class _FakeHomeMixin:
     def _setup_fake_home(self) -> None:
         self._tmp = tempfile.TemporaryDirectory(prefix="enum-active.")