Introduce ChangePasswordRequest DTO and a new ChangePassword endpoint in AuthController that validates input, changes the user's password via UserManager, updates the security stamp, signs out the user to invalidate sessions, and returns localized messages. Add a simple authorized AppUserController stub (GET /auth/user). Update the 404 view to resolve auth status via fetchCurrentUser, show a dynamic CTA/icon (Dashboard vs Home), auto-redirect after a short delay with proper timer cleanup, and adjust navigation behavior. Update codexInfo.md to document the 404 behavior change.
Jonas
bd261b6868