Bind clipboard media keys (XF86Paste/Copy)

Route <XF86Paste> through ghostel-yank (mirroring C-y and darwin s-v)
and map <XF86Copy> to kill-ring-save. Without explicit
bindings these fall through to the global yank/kill-region, which
write to the Emacs buffer and get overpainted by the next redraw.

Author: Cianidos

ghostel.el

@@ -941,6 +941,9 @@ is non-nil.")
     (define-key map (kbd "C-y")       #'ghostel-yank)
     (when (eq system-type 'darwin)
       (define-key map (kbd "s-v")     #'ghostel-yank))
+    ;; Clipboard media keys
+    (define-key map (kbd "<XF86Paste>") #'ghostel-yank)
+    (define-key map (kbd "<XF86Copy>")  #'kill-ring-save)
     (define-key map (kbd "M-y")       #'ghostel-yank-pop)
     ;; Terminal control via C-c prefix (pass through to Emacs, then handled here)
     (define-key map (kbd "C-c C-c")   #'ghostel-send-C-c)