Flashing dashboard

With current persistance implementation, if an unauthenticated user goes to dashboard he will be able to see the render dashboard page render for a slight moment.
Fix: Udemy courses for reference (it was somewhere in MERN stack course)

Look at the authentication and routing logic in the frontend code, likely in a React component or route guard. The issue mentions a MERN stack course for reference, so examine how the dashboard is conditionally rendered. Check for any client-side persistence that might briefly show the dashboard before redirecting. The fix involves ensuring the dashboard only renders after authentication is confirmed.

由索引模型根據 Issue 內容生成。