Session ID page: replace `container mx-auto` with `w-full` — removes the
Tailwind breakpoint max-width cap that was narrower than the outer layout's
max-w-7xl on smaller desktop viewports, and eliminates the double-padding
from nested container classes.
Presenter ID page: replace the conflicting `md:container items-center mx-auto
h-full min-w-full max-w-max` with a clean `w-full`. The `items-center` was
the main bug — in flex-col context it horizontally centered children (presenter
details, file upload form, file list) at their content width instead of
stretching them to fill the available space. Removes all of the conflicting
min/max width overrides.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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