Refactor: Remove server state files and update server log handling

- Deleted server-stopped, server.log, and server.pid files to clean up unused state.
- Updated game-page-client.tsx to enhance button accessibility with cursor-pointer class.
- Modified not-found.tsx, page.tsx, and profile/page.tsx for consistent cursor-pointer usage on links.
- Adjusted search/page.tsx and components/auth/*.tsx for improved button interactions with cursor-pointer.
- Refined navbar.tsx for better user experience with cursor-pointer on navigation links.
- Updated settings-security-tab.tsx for passkey management API endpoints and improved error handling.
- Enhanced saved-games components for better user interaction with cursor-pointer on buttons.
- General code cleanup and consistency improvements across various components.

components/auth/signup-form-step.tsx

@@ -143,7 +143,7 @@ export default function SignupFormStep({ onSuccess }: SignupFormStepProps) {
 
             <p className="text-center text-sm text-text/50">
                 Already have an account?{" "}
-                <Link href="/login" className="text-primary hover:underline">
+                <Link href="/login" className="text-primary hover:underline cursor-pointer">
                     Sign in
                 </Link>
             </p>