The login page sometimes swapped to a random bg-intro-N still on load,
breaking the seamless handoff from the intro video. Now: until anyone
has logged in / set a password (neode_first_login_done, stamped by every
Login success path incl. TOTP and setup), /login keeps the VIDEO
background — one continuous shot from the splash. From the second login
onward the lock screen rotates through the static backgrounds as
designed, and if the static path is ever hit pre-first-login it pins to
bg-intro.jpg (the video's end frame) instead of rotating.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
