chore(deps): update dependency ruff to v0.16.0

Author: renovate[bot]

pyproject.toml

@@ -22,7 +22,7 @@ dependencies = [
 ]
 
 [dependency-groups]
-dev = ["pyright==1.1.411", "ruff==0.15.22", "textual-dev==1.8.0"]
+dev = ["pyright==1.1.411", "ruff==0.16.0", "textual-dev==1.8.0"]
 
 [project.scripts]
 sachi = "sachi:cli_app"
@@ -42,3 +42,4 @@ pythonVersion = "3.12"
 
 [tool.ruff.lint]
 extend-select = ["I"]
+ignore = ["RUF012"]

sachi/app.py

@@ -19,9 +19,9 @@ class SachiApp(App):
         ("q", "quit", "Quit"),
     ]
 
-    def __init__(self, file_or_dir: Path = Path.cwd(), **kwargs):
+    def __init__(self, file_or_dir: Path | None = None, **kwargs):
         super().__init__(**kwargs)
-        self.file_or_dir = file_or_dir
+        self.file_or_dir = file_or_dir or Path.cwd()
 
     def on_mount(self):
         config = read_config()