Feature: Add Client-Side Pagination to Events Page

[GenDelta]

Requirements

• Implement client-side pagination for the Events page with exactly 6 event cards per page.
• Display event cards using a Most Recent First ordering strategy.
• Add reusable next-page and previous-page navigation UI for traversing event pages.
• Design the pagination component for reuse in the Gallery pagination work described in issue Feature: Add Gallery Pagination and Image Sorting #111.
• Follow the repository's existing component, styling, accessibility, and responsive UI conventions.

Acceptance Criteria

• The Events page displays no more than 6 event cards per page.
• Event cards are ordered from most recent to oldest.
• Users can navigate to the next and previous event pages.
• Previous and next controls are disabled or hidden appropriately at the first and last pages.
• Pagination is implemented on the client side.
• The pagination UI is extracted into a reusable component that can also be used by issue Feature: Add Gallery Pagination and Image Sorting #111.
• The controls are responsive and accessible.
• The project builds successfully and existing event-card behavior continues to work.