chawan as manpager and fixes to rebuild shortcuts

platforms/home-manager/modules/nmasur/presets/programs/chawan.nix

@@ -15,11 +15,20 @@ in
 
   config = lib.mkIf cfg.enable {
 
+    programs.chawan = {
+      enable = true;
+      settings = {
+        external.copy-cmd = if pkgs.stdenv.isLinux then "xclip -selection clipboard -in" else "pbcopy";
+      };
+    };
+
     # Set Chawan as the default app for manual pages
     home.sessionVariables = {
-      MANPAGER = "${pkgs.chawan}/bin/mancha";
+      MANPAGER = "${lib.getExe pkgs.chawan} -T text/x-ansi";
     };
 
+    programs.fish.shellAbbrs.man = "mancha";
+
   };
 
 }