The header now stacks on mobile: title row up top, stepper on its own
row below, and the theme toggle moves into the footer's right edge so
it isn't competing for space with the title or stepper. Stepper labels
drop the leading "1." prefix (saves ~8ch across five steps) and the
mobile container has overflow-x-auto so very narrow screens scroll
instead of breaking layout.
Clear-cache button on the upload card collapses to icon-only on mobile
so the centered "Load Source Image" title doesn't sit underneath it;
the confirm state still reads "Sure?" so the destructive prompt is
visible at a glance.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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