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/hypr/hyprland.conf

@@ -546,6 +546,7 @@ bind = $hyper SHIFT, L, exec, hyprlock
 bind = $hyper, K, exec, rofi_kill_process.sh
 bind = $hyper SHIFT, K, exec, rofi_kill_all.sh
 bind = $hyper, R, exec, rofi-systemd
+bind = $hyper, slash, exec, toggle_taffybar
 bind = $hyper, 9, exec, start_synergy.sh
 bind = $hyper, I, exec, rofi_select_input.hs
 bind = $hyper, O, exec, rofi_paswitch