fix: auth bug

[JacobLinCool]

This pull request includes several changes to improve the authentication flow and user interface in the application. The most important changes include adding a new route exception for sign out, enhancing the user interface for authenticated users, and adding logging for authentication state changes.

Enhancements to authentication flow:

• src/hooks.server.ts: Added a new route exception for /api/auth/signout to the authentication middleware to allow users to sign out without being authenticated.
• src/lib/stores/auth.ts: Updated the signOut function to check if there is a current user before attempting to sign out, ensuring no errors occur if the user is already signed out.

User interface improvements:

• src/lib/components/Auth.svelte: Improved the layout of the authenticated user interface by adding flexbox classes to the container div, enhancing the visual presentation.

Logging and debugging:

• src/lib/stores/auth.ts: Added a console log statement to log authentication state changes, aiding in debugging and monitoring authentication events.

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

Files not reviewed (1)

• src/lib/components/Auth.svelte: Language not supported