FRONTEND: Contest Listing Page with Server-Side Filters

Description
SSR page displaying paginated contests with dynamic filters.

Acceptance Criteria:

1. URL params control filters:
   /contests?sport=nba&minFee=0.1&page=2
2. Server-side rendered initial data using getServerSideProps
3. Client-side pagination via useSWRInfinite
4. Filter sidebar with:
   • Sport multi-select (NBA/NFL/MLB)
   • Entry fee range slider
   • Date picker for start time
5. Loading states with skeleton screens

Technical Details:

// pages/contests.tsx
export const getServerSideProps: GetServerSideProps = async ({ query }) => {
  const res = await fetch(`${API_URL}/contests?${qs.stringify(query)}`);
  return { props: { initialData: await res.json() } };
};

function ContestsPage({ initialData }) {
  const { data, setSize } = useSWRInfinite((pageIndex) => 
    `/api/contests?${qs.stringify({ ...query, page: pageIndex + 1 })}`
  );
  
  return (
    <div>
      <ContestFilters />
      <InfiniteLoader onLoadMore={() => setSize(size => size + 1)}>
        {data?.map(page => page.contests.map(contest => 
          <ContestCard key={contest.id} {...contest} />
        ))}
      </InfiniteLoader>
    </div>
  );
}

Notes:

• Use next-query-params for URL state management
• Debounce filter updates by 500ms
• Implement scroll restoration

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