Virtualize or paginate large audit and notification lists

[Abidoyesimze]

Summary

Long mock event lists can degrade responsiveness as datasets grow.

Affected files

• src/components/audit/AuditTrail.tsx
• src/components/notifications/NotificationCenter.tsx

Tasks

• Add pagination or windowing to audit trail and notification center.
• Preserve existing filter/sort behavior.
• Verify keyboard and screen-reader access after changes.

Acceptance criteria

• Scope is limited to the files listed (or agreed alternatives in the PR).
• Change is verifiable: tests, screenshots, or written QA steps in the PR.
• No behavior regressions in related user flows.
• No new duplicate abstractions without a one-line rationale in the PR.

Suggested labels

cleanup, performance, frontend

Notes

Standalone cleanup issue from CLEANUP_ISSUES_2026-05.md. Complements the audit queue and product backlog.