有这个想法是因为之前还在用corfu时，它的这个配置可以开启 minibuffer 补全，M-: 时就很好用：
相关代码：
;; src: https://github.com/minad/corfu#completing-in-the-minibuffer
;; 1.
(defun corfu-enable-in-minibuffer ()
"Enable Corfu in the minibuffer if `completion-at-point' is bound."
(when (where-is-internal #'completion-at-point (list (current-local-map)))
;; (setq-local corfu-auto nil) ;; Enable/disable auto completion
(setq-local corfu-echo-delay nil ;; Disable automatic echo and popup
corfu-popupinfo-delay nil)
(corfu-mode 1)))
(add-hook 'minibuffer-setup-hook #'corfu-enable-in-minibuffer)
;; 2.
(defun corfu-enable-always-in-minibuffer ()
"Enable Corfu in the minibuffer if Vertico/Mct are not active."
(unless (or (bound-and-true-p mct--active)
(bound-and-true-p vertico--input)
(eq (current-local-map) read-passwd-map))
;; (setq-local corfu-auto nil) ;; Enable/disable auto completion
(setq-local corfu-echo-delay nil ;; Disable automatic echo and popup
corfu-popupinfo-delay nil)
(corfu-mode 1)))
(add-hook 'minibuffer-setup-hook #'corfu-enable-always-in-minibuffer 1)
期待猫大有空时顺手实现一个 （ 