feat: initial macos setup

home/modules/vscode.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }: {
+{ pkgs, lib, isDarwin, ... }: {
   programs.vscodium = {
     enable = true;
     package = pkgs.vscodium;
@@ -18,12 +18,16 @@
         rust-lang.rust-analyzer
         timonwong.shellcheck
         unifiedjs.vscode-mdx
-        yzane.markdown-pdf
       ]) ++ pkgs.nix4vscode.forOpenVsx [
         "akamud.vscode-theme-onedark"
         "astral-sh.ty"
         "modular-mojotools.vscode-mojo"
-      ];
+      ] ++ lib.optionals (!isDarwin) (with pkgs.vscode-extensions; [
+        # markdown-pdf pins ungoogled-chromium (Linux-only) as its PDF
+        # renderer. On macOS, install it from the marketplace by hand and set
+        # markdown-pdf.executablePath to Chrome/Brave, or render via typst.
+        yzane.markdown-pdf
+      ]);
 
       userSettings = {
         "editor.fontFamily" = "'JetBrains Mono', monospace";