Windows support

Main.py

@@ -18,8 +18,9 @@ from Sidebar import Sidebar
 def _SetCursorThemeFallback() -> None:
     """GTK's cursor lookup reads XCURSOR_THEME directly; it isn't always inherited
     from the desktop session (shows as 'Unable to load ... from the cursor theme').
-    Fill it in from gsettings if missing, so the warning has nowhere to come from."""
-    if os.environ.get("XCURSOR_THEME"):
+    Fill it in from gsettings if missing, so the warning has nowhere to come from.
+    GTK/GNOME only: nothing to do on Windows."""
+    if os.environ.get("XCURSOR_THEME") or sys.platform == "win32":
         return
     try:
         Result = subprocess.run(
@@ -233,6 +234,9 @@ def Main(Page: ft.Page) -> None:
     Page.padding = 0
     Page.window.width = 1100
     Page.window.height = 700
+    if sys.platform == "win32":
+        # The taskbar/title bar icon (on Linux it comes from the desktop entry).
+        Page.window.icon = str(Path(__file__).resolve().parent / "assets" / "Icon.ico")
     Page.window.title_bar_hidden = Appearance.HideWindowTitleBar
 
     PickerArgs = _ParsePickerArgs()
@@ -246,7 +250,7 @@ def Main(Page: ft.Page) -> None:
 
 
 if __name__ == "__main__":
-    if "--portal-service" in sys.argv:
+    if "--portal-service" in sys.argv and sys.platform != "win32":  # Linux's file-picker portal only
         # No Flet page at all here — the D-Bus FileChooser backend is a
         # plain asyncio service (see PortalService.py) that
         # spawns *this same executable* again with --pick-* flags for the