Per feedback, wrap the destination modal content in a Bootstrap .container-fluid
and give that a 1rem frame in the WAM stylesheet, instead of a custom
.msbackup class on .modal-content. Inner header/body/footer drop their own
horizontal padding so the frame isn't doubled.
Claude-Session: https://claude.ai/code/session_01WbGBN9VyRK61zczYWcCQ2i