refactor: update session cookie options and improve login view authentication flow

- Revised SameSite attribute for session cookies to clarify its behavior in documentation.
- Streamlined cookie clearing logic in the authentication route by utilizing `getSessionCookieOptions()`.
- Enhanced the login view to support aborting server checks, improving responsiveness during component unmounting.
- Ensured proper handling of server check retries with abort signal integration for better user experience.

apps/server/tests/unit/lib/auth.test.ts

@@ -277,7 +277,7 @@ describe('auth.ts', () => {
       const options = getSessionCookieOptions();
 
       expect(options.httpOnly).toBe(true);
-      expect(options.sameSite).toBe('strict');
+      expect(options.sameSite).toBe('lax');
       expect(options.path).toBe('/');
       expect(options.maxAge).toBeGreaterThan(0);
     });