Function go

src/Components/Home/home.jsx:129–140

(dir)

        // One gesture = one page change. The lock absorbs trackpad inertia
        // (which fires a burst of +/- deltas) so the page can't flip-flop.
        const go = (dir) => {
            if (lock) return;
            setPageIndex((cur) => {
                const next = Math.min(Math.max(cur + (dir > 0 ? 1 : -1), 0), PAGE_COUNT - 1);
                if (cur === next) return cur;
                lock = true;
                setTimeout(() => {
                    lock = false;
                }, 1000);
                return next;
            });
        };
        // when the active screen's own content overflows, let it scroll natively
        // until it hits the edge — only then do we snap to the next/prev screen
        const canScrollWithin = (dir) => {