Sort host lists in state file for consistent output (#174)

* Sort host lists in state file for consistent output

Multi-host stacks (like glances) now have their host lists sorted
alphabetically when saving state. This makes git diffs cleaner by
avoiding spurious reordering changes.

src/compose_farm/state.py

@@ -64,8 +64,11 @@ def load_state(config: Config) -> dict[str, str | list[str]]:
 
 
 def _sorted_dict(d: dict[str, str | list[str]]) -> dict[str, str | list[str]]:
-    """Return a dictionary sorted by keys."""
+    """Return a dictionary sorted by keys, with list values also sorted."""
-    return dict(sorted(d.items(), key=lambda item: item[0]))
+    return {
+        k: sorted(v) if isinstance(v, list) else v
+        for k, v in sorted(d.items(), key=lambda item: item[0])
+    }
 
 
 def save_state(config: Config, deployed: dict[str, str | list[str]]) -> None:

tests/test_state.py

@@ -67,6 +67,16 @@ class TestSaveState:
         assert "plex: nas01" in content
         assert "jellyfin: nas02" in content
 
+    def test_save_state_sorts_host_lists(self, config: Config) -> None:
+        """Saves state with sorted host lists for consistent output."""
+        # Pass hosts in unsorted order
+        save_state(config, {"glances": ["pc", "nas", "hp", "anton"]})
+
+        state_file = config.get_state_path()
+        content = state_file.read_text()
+        # Hosts should be sorted alphabetically
+        assert "- anton\n  - hp\n  - nas\n  - pc" in content
+
 
 class TestGetStackHost:
     """Tests for get_stack_host function."""