feat: implementation of logout functionality

[Akhileswara-Microsoft]

Purpose

This pull request adds authentication awareness and user identity display to the sidebar, refactors user info handling, and improves the layout of the left panel and its footer. Authentication and User Info Handling
These changes centralize authentication state, improve the user experience by showing real user info, and modernize the sidebar's appearance.

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

This pull request introduces authentication improvements and UI updates, primarily replacing the legacy user card with a new login and user menu, and integrating Azure EasyAuth user info into the global app state. It also includes style adjustments for better layout consistency.
These changes modernize authentication handling, improve user experience, and clean up legacy code.

What to Check

Verify that the following are valid
Check whether signed in user is able to sign out

[Copilot]

Pull request overview

Adds centralized authentication state (via Azure EasyAuth) and surfaces current user identity + sign-out UI in the left panel footer, alongside some layout tweaks to improve sidebar alignment and footer stacking.

Changes:

• Introduces a Redux thunk (fetchCurrentUser) to load EasyAuth user identity into global app state and dispatches it on app mount.
• Replaces the legacy user card in the left panel footer with a new LoginButton user menu (includes sign-out).
• Adjusts left panel/footer styling and footer z-index to improve layout/stacking.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/App/src/styles/PlanPanelLeft.css	Adjusts sidebar layout alignment/padding.
src/App/src/store/slices/appSlice.ts	Adds auth fields + thunk to fetch EasyAuth user info into Redux.
src/App/src/components/content/PlanPanelLeft.tsx	Removes legacy user info card and uses new login/user control in footer.
src/App/src/components/auth/LoginButton.tsx	New user avatar/menu UI with sign-out behavior.
src/App/src/commonComponents/components/Panels/PanelLeft.tsx	Ensures footer overlays correctly via z-index.
src/App/src/commonComponents/components/Panels/PanelFooter.tsx	Tweaks footer padding to match new layout.
src/App/src/App.tsx	Dispatches fetchCurrentUser() on initial mount.

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[github-actions]

🎉 This PR is included in version 4.2.1 🎉

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