Align desktop theming around Noctalia Ayu

- Move Sway, GTK, Qt, Alacritty, and Emacs toward the Noctalia-generated Ayu theme
- Add shared font/cursor settings, qt5ct/qt6ct templates, and Flatpak theme integration support
- Keep browser and Telegram theming manual while preserving generated Noctalia assets where useful

dotfiles/desktop/.emacs.d/lisp/core/ui.el

@@ -1,16 +1,14 @@
 ;;; core-ui.el -*- lexical-binding: t; -*-
 
-;; Load default theme
-(use-package nordic-night-theme
-  :ensure t)
-
-(load-theme 'nordic-night t)
+;; Load generated Noctalia theme.
+(add-to-list 'custom-theme-load-path (expand-file-name "themes" user-emacs-directory))
+(load-theme 'noctalia t)
 
 ;; Setting default font
-(set-frame-font "Liberation Mono 14" nil t)
+(set-frame-font "Hack Nerd Font 14" nil t)
 
 (add-to-list 'default-frame-alist
-	     '(font . "Liberation Mono-14"))
+	     '(font . "Hack Nerd Font-14"))
 
 ;; Remove toolbar
 (tool-bar-mode -1)