refactor: update project code

project_manager/preset/resolve.py

@@ -1,6 +1,6 @@
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Dict, Iterable, Optional
+from typing import Iterable
 
 import tomli
 
@@ -21,16 +21,15 @@ class PresetResolverConfig:
 
 
 class PresetResolver:
-    _source_cache: Dict[Path, dict] = {}
+    _source_cache: dict[Path, dict] = {}
 
-    def __init__(self, basepath: Path, config: Optional[PresetResolverConfig] = None):
+    def __init__(self, basepath: Path, config: PresetResolverConfig | None = None):
         self._basepath = basepath
         self._config = config or PresetResolverConfig()
 
     def iter_sources(self) -> Iterable[Path]:
         if self._config.default:
-            for filepath in (Path(__file__).parent / "default").iterdir():
-                yield filepath
+            yield from (Path(__file__).parent / "default").iterdir()
         if self._config.user:
             user_preset = Path.home() / ".preset.toml"
             if user_preset.exists():