Control Invoice Visibility by Client Member Role

Allow agencies to hide invoices for specific client members within the same organization.

For example, an organization can have "admin" members who should see and manage all invoices, and "regular" members who should not see any billing information.

Add a setting at the client member or role level to:

• Mark a member as having invoice access or not

• Show invoices, billing tab, and invoice emails only to members with invoice access

This helps agencies keep billing information visible only to the appropriate client admins.