[UX / Performance] Leaderboard has no pagination or "load more" for large player lists

[Hydrax117]

File: src/app/leaderboard/page.tsx
Priority: Medium
Type: UX / Performance

Description:
Once the leaderboard is connected to real data, rendering hundreds or thousands of players in a single list will be slow and unusable. No pagination, infinite scroll, or virtualization is planned.

Acceptance criteria:

• Leaderboard is paginated (e.g., 25 players per page) with Previous/Next controls
• OR infinite scroll / "Load More" button is implemented
• Current page and total count are displayed (e.g., "Showing 1–25 of 1,240 players")

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[kodegreen70]

@kodegreen70 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

hi 👋
i would like to work on this issue

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This issue has been completed by @kodegreen70 as part of the Stellar Wave Program's 5th Wave 🥳

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