Add Sonner-based notifications and UX polish

messages/en.json

@@ -9,8 +9,16 @@
     "openMenu": "Open menu",
     "closeMenu": "Close menu",
     "themeToggle": "Toggle theme",
+    "themeLight": "Light mode enabled",
+    "themeDark": "Dark mode enabled",
     "soundMute": "Mute sounds",
-    "soundUnmute": "Unmute sounds"
+    "soundUnmute": "Unmute sounds",
+    "soundMuted": "Sound muted",
+    "soundEnabled": "Sound enabled",
+    "localeChangedDe": "Language changed to German",
+    "localeChangedEn": "Language changed to English",
+    "localeChangedAr": "Language changed to Arabic",
+    "logoTripleClick": "Easy there. The logo is not a panic button."
   },
   "footer": {
     "copyright": "© {year} moh-sass. All rights reserved."