Raise responsive layout breakpoints from 768px to 900px across all
components. This ensures narrow desktop browser windows (769–900px)
get the stacked, single-column layout rather than the three-column
grid that was too wide for those widths. The 768px breakpoint in
app.css is kept as-is since it only adjusts font sizes for iOS.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Move the upload confirmation dialog above the action buttons so it's
immediately visible, and add overflow-safe CSS to prevent text from
spilling outside the dialog box on mobile.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Nathan Schneider