feat: Add admin attendee search/edit and order detail pages

[replicas-connector]

Summary

• Adds a new Attendees page to the superadmin area with search (by name, email, ticket ID), sortable columns, pagination, and an inline edit modal for updating attendee name, email, and notes
• Adds a new Order Detail page accessible by clicking any order row in the admin orders table, showing customer info, payment breakdown, and a list of attendees on that order
• Updates the admin orders table so rows are clickable and link to the detail view

Backend

• GET /api/admin/attendees — paginated attendee search across all accounts/events
• PUT /api/admin/attendees/{id} — edit attendee first name, last name, email, notes
• GET /api/admin/orders/{id} — detailed order with event, account, and attendees
• All endpoints require SUPERADMIN role

Frontend

• /admin/attendees — new page with search, sort, pagination, edit modal
• /admin/orders/:orderId — new detail page with customer, payment, order info, attendees table
• Admin sidebar updated with Attendees nav item
• Orders table rows now navigate to detail on click

Test plan

• Verify /admin/attendees loads and search filters correctly
• Verify editing an attendee via the modal updates the record
• Verify clicking an order row in /admin/orders navigates to the detail page
• Verify order detail shows correct payment breakdown and attendees list
• Verify all endpoints return 403 for non-superadmin users

🤖 Generated with Claude Code

Replicas workspace