- Move Video/Audio toggle to same row as Download button
- Auto-condense toggle to icon-only below 540px
- Move gear icon to right of Download button
- Fix file download URLs: normalize filenames to relative paths in progress hook
- Display filename with visible extension (truncate middle, preserve ext)
- Remove border/box from dark mode toggle — glyph only
- Fix light/dark theme fonts: use monospace display font across all themes