feat: add scratchpad to i3 config

home/i3/default.nix

@@ -159,7 +159,8 @@ in
               names = [ "SpaceMono Nerd Font" ];
               size = 10.0;
             };
-            keybindings = lib.mkOptionDefault {
+            keybindings = lib.mkOptionDefault (
+              {
                 "${modifier}+h" = "focus left";
                 "${modifier}+j" = "focus down";
                 "${modifier}+k" = "focus up";
@@ -181,9 +182,9 @@ in
                 "${modifier}+r" = ''mode "${resizeMode}"'';
                 "${modifier}+Escape" = ''mode "${powerManagementMode}"'';
                 "${modifier}+Shift+Escape" = ''mode "${miscellaneousMode}"'';
-              # workspace
-              # "${modifier}+Shift+minus" = "move scratchpad";
-              # "${modifier}+minus" = "scratchpad show";
+                # scratchpad
+                "${modifier}+Shift+grave" = "move scratchpad";
+                "${modifier}+grave" = "scratchpad show";
                 # media
                 "XF86AudioRaiseVolume" =
                   "exec --no-startup-id ${pactl} set-sink-volume @DEFAULT_SINK@ +1% && ${refresh_i3status}";
@@ -214,7 +215,13 @@ in
                 "${modifier}+Shift+e" = null;
                 "${modifier}+w" = null;
                 "${modifier}+d" = null;
-            };
+              }
+              # neomutt (only if enabled) - focus existing or spawn new
+              // lib.optionalAttrs config.custom.email.neomutt {
+                "${modifier}+m" =
+                  ''exec --no-startup-id sh -c 'i3-msg "[instance=ghostty][title=neomutt] focus" || ${terminal} -e neomutt' '';
+              }
+            );
             modes =
               let
                 exitMode = {