Previous cap shrank the box to "exactly N cards at min width", which
made 3 cards sit a few pixels short of the layout edge on a 3-column
viewport while 4 cards (which wraps internally) ran edge-to-edge —
visually inconsistent and the user flagged the gap.
updateAppsCount now measures the parent's available inner width
(minus the section's own 90px overhead: 22 margin + 22 padding + 1
border, doubled) and computes the natural column count the auto-fill
grid would pick at full width. If visible cards >= that count, the
function passes a sentinel (99) as --app-count so the formula
overshoots the 100%-44px parent cap and yields the layout-edge box.
Otherwise the cap still kicks in to hide card-shaped holes for 1-2
cards.
Also wired a window resize listener in the constructor so dragging
the window, snapping it, or opening devtools re-evaluates the
decision — the natural column count is viewport-dependent.
Signed-off-by: librelad <librelad@digitalangels.vip>
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