fix(macos): sync Neovim Catppuccin with system appearance

Write ~/.local/share/nvim_color_scheme from the same macOS Appearance probe as Alacritty; trim the nvim theme line read for robustness.

Made-with: Cursor

nixos/neovim.nix

@@ -16,8 +16,11 @@
         local config_file = os.getenv("HOME")..'/.local/share/nvim_color_scheme'
         local f = io.open(config_file, "r")
         if f ~= nil then
-            local system_theme = f:read()
+            local system_theme = f:read("*l")
             io.close(f)
+            if system_theme then
+                system_theme = system_theme:gsub("^%s+", ""):gsub("%s+$", "")
+            end
             if system_theme == 'dark' then
                 vim.cmd("set bg=dark")
             elseif system_theme == 'light' then

scripts/alacritty-sync-system-theme.sh

@@ -29,6 +29,11 @@ fi
 mkdir -p "$ALACRITTY_DIR"
 printf '%s' "$want" >"$MARKER"
 
+# Neovim (see nixos/neovim.nix): same file as `theme` on WSL; keep in sync with Appearance.
+NVIM_THEME="${XDG_DATA_HOME:-$HOME/.local/share}/nvim_color_scheme"
+mkdir -p "$(dirname "$NVIM_THEME")"
+printf '%s\n' "$want" >"$NVIM_THEME"
+
 if [[ "$want" == "light" ]]; then
   tmp="$(mktemp "$ALACRITTY_DIR/active-colors.toml.XXXXXX")"
   cp "$LIGHT" "$tmp"