Remove client-side token storage and Authorization header injection
Backend login now only returns user data, omitting the session token
Remove Authorization from backend CORS allowed headers
Clean up obsolete VITE_* environment variable fallbacks
Update Modal component to use Vue useId() instead of Math.random()
Drop display_id column from items and ancient_artifacts tables
Remove display ID inputs, labels, and sorting logic across the stack
BREAKING CHANGE: behavior is not backward compatible.
