feat: manage Handy preferences and startup declaratively

modules/capabilities/niri/_bindings.nix

@@ -36,7 +36,7 @@ in
   };
 
   # Dictation
-  "Mod+D" = {
+  "Mod+Shift+D" = {
     spawn = [
       handy
       "--toggle-transcription"
@@ -44,7 +44,7 @@ in
     _props.repeat = false;
     _props.hotkey-overlay-title = "Toggle Dictation";
   };
-  "Mod+Shift+D" = {
+  "Mod+Ctrl+D" = {
     spawn = [
       handy
       "--cancel"

modules/capabilities/niri/default.nix

@@ -41,19 +41,11 @@ in
             playerctl
             brightnessctl
             wireplumber
-            handy
             wtype
           ]
           ++ [ swapMonitorWorkspaces ];
       };
 
-      desktop.autostart = [
-        [
-          (lib.getExe pkgs.handy)
-          "--start-hidden"
-        ]
-      ];
-
       dconf.settings."org/gnome/desktop/interface".color-scheme = "prefer-dark";
 
       wayland.windowManager.niri = {