style(config): Reformat Emacs Lisp code for consistency

Standardize formatting across multiple init files: expand
single-line use-package keywords onto separate lines, fix
indentation, remove outdated comments, and clean up whitespace. Also
adds mc/keymap <return> binding and improves fcitx5 startup logic in
EXWM.

lisp/init-ui.el

@@ -68,17 +68,10 @@
 ;; (use-package color-theme-modern)
 (use-package naysayer-theme)
 
-;; (use-package simple-modeline
-;;   :init (simple-modeline-mode)
-;;   :config
-;;   ;; (defun simple-modeline-segment-buffer-name ()
-;;   ;;   "Displays the full path of current file in the mode-line."
-;;   ;;   (propertize " %f" 'face 'mode-line-buffer-id))
-;;   )
-
 ;; eshell高亮
 (use-package eshell-syntax-highlighting
-  :hook (eshell-mode . eshell-syntax-highlighting-global-mode))
+  :hook
+  (eshell-mode . eshell-syntax-highlighting-global-mode))
 
 (add-hook 'eshell-mode-hook
           (lambda ()
@@ -90,6 +83,7 @@
                     "di=34:ln=35:so=32:pi=33:ex=31:bd=34;46:cd=34;43:su=30;41:sg=30;46")
             (setenv "GIT_CONFIG_GLOBAL" (expand-file-name "~/.emacs.d/.gitconfig-eshell"))))
 
+;; 缩进线
 (use-package indent-bars
   :custom
   (indent-bars-color '(font-lock-comment-face :face-bg nil :blend 0.4))