💄(frontend) adjust message notification size for better readability

Increase message notification size to improve text readability when
notifications appear, enhancing user experience by making content more
visible at a glance.

src/frontend/src/features/notifications/components/ToastMessageReceived.tsx

@@ -40,9 +40,9 @@ export function ToastMessageReceived({ state, ...props }: ToastProps) {
             padding: '14px',
             gap: '0.75rem',
             textAlign: 'start',
-            width: '150px',
+            width: '250px',
             md: {
-              width: '260px',
+              width: '350px',
             },
           })}
         >