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/.config/noctalia/plugins/clipper/settings.json

@@ -38,43 +38,7 @@
       "fg": "mOnError"
     }
   },
-  "customColors": {
-    "Text": {
-      "bg": "#555555",
-      "separator": "#000000",
-      "fg": "#e9e4f0"
-    },
-    "Image": {
-      "bg": "#e0b7c9",
-      "separator": "#000000",
-      "fg": "#20161f"
-    },
-    "Link": {
-      "bg": "#c7a1d8",
-      "separator": "#000000",
-      "fg": "#1a151f"
-    },
-    "Code": {
-      "bg": "#a984c4",
-      "separator": "#000000",
-      "fg": "#f3edf7"
-    },
-    "Color": {
-      "bg": "#a984c4",
-      "separator": "#000000",
-      "fg": "#f3edf7"
-    },
-    "Emoji": {
-      "bg": "#e0b7c9",
-      "separator": "#000000",
-      "fg": "#20161f"
-    },
-    "File": {
-      "bg": "#e9899d",
-      "separator": "#000000",
-      "fg": "#1e1418"
-    }
-  },
+  "customColors": {},
   "enableTodoIntegration": true,
   "autoOpenPinnedPanel": false,
   "pincardsEnabled": true,