Two UAT nits on the channel page:
- the chip-row-to-cards gap was ~36px (toolbar pb-3 + wrapper pb-2 + grid
pt-3 stacking); drop the wrapper/grid pads so the toolbar's own pb-3 is
the only gap (~15px).
- restore the page scroller's TOP edge fade. It was dropped when the chrome
was a sticky sub-header (the fade bit into it); now the chrome is a fixed
band ABOVE the scroller, so the top fade correctly hints at cards
scrolling up under the toolbar. Reverts the useScrollFade edges option.
Suite 15/15, tsc + knip clean.