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🐞 Bug Report: “Sign-In Successful” Toast Reappears When Switching Tabs

📌 Issue Overview

After logging in, the user correctly sees the “Sign-In Successful” toast once.
However, when switching between browser tabs or reopening the same tab, the toast message reappears multiple times — even though the user session is already active.

This does not happen when navigating within the website using internal routes.
The issue only occurs when switching or reopening browser tabs.

🔍 Steps to Reproduce

1. Log in to the application successfully.
2. Observe the “Sign-In Successful” toast appearing once (✅ expected).
3. Open a new browser tab or switch to another tab.
4. Return to the original tab.
5. The same “Sign-In Successful” toast appears again repeatedly.

🎯 Expected Behavior

The “Sign-In Successful” toast should appear only once, immediately after successful login —
and should not reappear when switching or reopening browser tabs.

🚨 Actual Behavior

The toast notification reappears every time the user switches back to the tab,
causing confusion and unnecessary repetition for authenticated users.

💡 Suggested Improvements

• Before showing the success toast, check if the user is already authenticated (via cookies, localStorage, or session state).
• Only trigger the toast when a new sign-in event occurs, not when the page gains focus again.

Example logic:

if (!toastShown && isAuthenticated) {
  showToast("Sign-In Successful");
  setToastShown(true);
}

###  🖼️ Screenshot / Screen Recording

https://github.com/user-attachments/assets/a63fccc2-8034-4b94-af1d-bdd183e17a05

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