Create Public Catalog Page with Search and Filtering

[vivjd]

Goal:
Create a simple, public-facing UI for browsing the collection.

Tasks:

• Catalogue page fetching from /api/public/items
• Search bar and filter controls
• Item detail page showing metadata (title, platform, status)

Acceptance Criteria:

• Public users can browse without login
• Filters and search behave correctly
• Item detail pages render accurate data