🔍 fix: Roles Search and Pagination

[dustinhealy]

Summary

Roles search and pagination were fighting each other. Search filtered client-side on the current server page only (e.g. 50 of 200+ roles), and the page number didn't reset — so typing a search term while on page 5 would show zero results even when matches existed on other pages.

Now RolesTab fetches all roles via allRolesQueryOptions (capped at 200 by the backend) and does client-side filtering + pagination with page reset on search input change.

The LibreChat roles list API (GET /api/admin/roles) does not support a search query parameter (unlike groups), so client-side filtering is the correct approach here.

Change Type

• Bug fix (non-breaking change which fixes an issue)

Testing

1. Seed 200+ roles in the database
2. Open the Access page → Roles tab
3. Verify pagination shows multiple pages
4. Type a search term → confirm results filter across all roles (not just the current page) and pagination resets to page 1
5. Clear search → confirm all roles return with correct page count
6. Navigate to page 3 → type a search → confirm page resets to 1

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• My changes do not introduce new warnings
• Local unit tests pass with my changes