Config: extract keybinding functions and clean up key configs

- Add init-kbd-func.el for keybinding helper functions
- Move global-display-line-numbers-mode from early-init.el to init.el
- Slim down init-kbd.el: remove hydra-multiple-cursors, migrate defs
- Reorganize dirvish config
- Remove scattered global-set-key bindings from init-org, init-ui, etc.
- Guard server-start with server-running-p check
- Set ibuffer-default-sorting-mode to filename
- Tweak gptel config

lisp/init-startup.el

@@ -65,7 +65,9 @@
 (advice-add 'scratch-buffer :after #'my/scratch-set-mode)
 
 ;; 开启server mode
-(server-start)
+(require 'server)
+(unless (server-running-p)
+  (server-start))
 
 ;; 窗口名
 (setq-default frame-title-format '("%b - Emacs"))
@@ -73,6 +75,9 @@
 ;; electirc-pair-mode
 (add-hook 'org-mode-hook 'electric-pair-local-mode)
 
+;; ibuffer
+(setq ibuffer-default-sorting-mode 'filename)
+
 ;; short anwser
 (if (boundp 'use-short-answers)
     (setq use-short-answers t)