O3-4478: Redirect logged-in users from login page to home page

[Willie-theBeastMutua]

Requirements

• This PR has a title that briefly describes the work done including the ticket number. Ensure your PR title includes a conventional commit label (such as feat, fix, or chore, among others). See existing PR titles for inspiration.

For changes to apps

• My work conforms to the O3 Styleguide and design documentation.

If applicable

• My work includes tests or is validated by existing tests.
• I have updated the esm-framework mock to reflect any API changes I have made.

Summary

This PR addresses the regression identified in O3-4478, where users who are already authenticated are not redirected to the home page when navigating back to /openmrs/spa/login.
✅ Changes Implemented:
Added a redirect check inside the login route handler to verify if the user is already authenticated.

If the session is valid, the user is automatically redirected to /openmrs/spa.

Screenshots

Screen.Recording.2025-07-22.at.14.53.43.mov

Related Issue

https://openmrs.atlassian.net/browse/O3-4478

Other