less saving, better Windows file handling

src/dispersionapp/__init__.py

@@ -1,3 +1,3 @@
-import importlib
+import importlib.metadata
 
 __version__ = importlib.metadata.version("dispersionapp")

src/dispersionapp/core.py

@@ -10,7 +10,7 @@ import tomli
 import tomli_w
 from pydantic import BaseModel, PrivateAttr, ValidationError, confloat
 
-DEFAULT_CONFIG_FILE = "config.toml"
+DEFAULT_CONFIG_FILE = "dispersion_config.toml"
 
 
 class CurrentState(BaseModel):
@@ -61,7 +61,7 @@ class Config(BaseModel):
         tmp = self._file_name.parent / f"{self._file_name.name}.tmp"
         with open(tmp, "wb") as file:
             tomli_w.dump(self.dict(), file)
-        tmp.rename(self._file_name)
+        tmp.replace(self._file_name)
 
     def update_current(
         self, core_diameter_um, pressure_mbar, wall_thickness_um, n_tubes, gap_um, t_fwhm_fs
@@ -74,7 +74,6 @@ class Config(BaseModel):
             gap_um=gap_um,
             t_fwhm_fs=t_fwhm_fs,
         )
-        self.save()
 
 
 class LimitValues(NamedTuple):

src/dispersionapp/gui.py

@@ -1,13 +1,13 @@
 from __future__ import annotations
 
 import os
+import warnings
+from functools import cache
 
 import numpy as np
 import scgenerator as sc
-from functools import cache
-import warnings
 
-from dispersionapp.core import Config, LimitValues, N_ion_max, N_sf_max, energy, b2
+from dispersionapp.core import Config, LimitValues, N_ion_max, N_sf_max, b2, energy
 from dispersionapp.plotapp import PlotApp
 
 
@@ -144,3 +144,5 @@ def app(config_file: os.PathLike | None = None):
             zdw = lim.wl_zero_disp * 1e9
             app[0].set_line_data("zdw", [zdw, zdw], [-3, 3])
             app[0].set_line_name("zdw", f"ZDW = {zdw:.0f}nm")
+
+    config.save()