Update taffybar (ScalingImage refactor), add toggle keybinding

- Bump taffybar submodule with ScalingImage refactor replacing autoSizeImage
- Add hyper+slash keybinding for toggle_taffybar
- Simplify mprisWidget wrapper in taffybar.hs
- Update flake.locks for gtk-sni-tray
- Add codex trust for taffybar submodule
- Add waybar widget ideas notes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

dotfiles/config/taffybar/taffybar.hs

@@ -291,15 +291,7 @@ mprisWidget :: TaffyIO Gtk.Widget
 mprisWidget =
   mpris2NewWithConfig
     MPRIS2Config
-      { mprisWidgetWrapper = \grid -> do
-          icon <- Gtk.labelNew (Just "\xF075A")
-          _ <- widgetSetClassGI icon "icon"
-          Gtk.widgetSetName icon "mpris-icon"
-          box <- Gtk.boxNew Gtk.OrientationHorizontal 0
-          Gtk.containerAdd box icon
-          Gtk.containerAdd box grid
-          Gtk.widgetShowAll box
-          Gtk.toWidget box >>= decorateWithClassAndBox "mpris"
+      { mprisWidgetWrapper = decorateWithClassAndBox "mpris"
       , updatePlayerWidget =
           simplePlayerWidget
             defaultPlayerConfig