CVE-2026-56828: Shopper: privilege escalation via improper Livewire admin component authorization

Three Livewire admin components in shopper/framework (latest master at commit fcd0c59, released as v2.8.0) gate state-mutating actions on the read-only view_users permission. This is the same class as the issue Shopper fixed in v2.8.0 / PR #511 / GHSA-f946-9qp6-vgch — the PR moved most write actions from view_users to access_setting, but three were missed (one of them is a brand-new file added by the security commit itself).

A staff user holding only view_users + access_dashboard (a realistic “support” or “viewer” role per Shopper’s own PermissionsTableSeeder) can: (1) self-escalate by granting any permission to their own role; (2) create a brand-new admin team member with a chosen password and the admin role and then log in as that user; (3) delete arbitrary permissions rows (RBAC DoS) or — when can_be_removed=true — delete entire roles.

CVSS 3.1: AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H = 8.8 (High). CWE-285 (Improper Authorization) + CWE-862 (Missing Authorization).