Endpoint Catalog & Admin Users Overhaul

What’s New

• Added GET /downloader/x for X/Twitter media downloads
• Converted endpoint catalog to category-based JSON files with schema validation
• Redesigned admin users page with search, filters, sorting, and bulk actions
• Added bulk user seed utility with dry-run and cleanup scripts

Improvements

• Endpoint catalog now auto-discovers category JSON files with duplicate ID detection
• Admin users table supports row selection, bulk delete, and per-page pagination
• Added role and verification status filters with table-header dropdown controls
• Modularized admin users into focused sub-components (filters, table, badges, dialogs)
• Endpoint detail playground compacted for better single-screen fit
• Added user distribution charts (role and verification) on admin page

Fixes

• Fixed hydration mismatch on admin users page from disabled attribute differences