Templates use HTMX to load data dynamically via AJAX
Added 5 endpoint stubs (will implement with real data):
1. /admin/servers/matrix - Server status grid
2. /admin/players/table - Player list
3. /admin/grace/list - Grace period users (WORKING with real DB query)
4. /admin/audit/feed - Recent webhook events
5. /admin/roles/mismatches - Discord role diagnostics
Grace endpoint COMPLETE - queries PostgreSQL and shows users in grace period
Others return 'Coming Soon' placeholders
TESTING:
- Grace Period page should show real data
- Other pages show 'Coming Soon' instead of loading spinner
Signed-off-by: Claude (Chronicler #57) <claude@firefrostgaming.com>