fix: restore terminal-backed Walker actions

modules/capabilities/terminal.nix

@@ -13,7 +13,7 @@ let
       postBuild = ''
         wrapProgram $out/bin/kitty --add-flags "-1"
         rm $out/share/applications/kitty.desktop
-        sed 's/Exec=kitty/Exec=kitty -1/g' ${pkgs.kitty}/share/applications/kitty.desktop > $out/share/applications/kitty.desktop
+        sed 's/^Exec=kitty/Exec=kitty -1/' ${pkgs.kitty}/share/applications/kitty.desktop > $out/share/applications/kitty.desktop
       '';
     };