audit: 33-agent comprehensive audit + critical fixes

Full team audit run, all reports verbatim in docs/AUDIT-2026-05-12.md
(5900+ lines, 30+ critical findings). Already-fixed this commit:
- permission-overrides PUT: self-target block + RolePermissions allow-list + cross-tenant guard
- /api/auth/resolve-identifier: rate-limit + synthetic miss-email kill enumeration
- admin email-change: rotates account.accountId + revokes sessions
- middleware: token-gated email confirm/cancel routes whitelisted
- NAV_CATALOG: 10 dead-link sweeps to existing /admin/<x> targets

Feature work landing same commit: optional username sign-in
(migration 0054), per-user permission overrides (0055) with three-state
matrix tabbed inside UserForm, user disable button, role + outcome +
stage label normalisation across the platform, admin email-change
with auto-notification template.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/admin/users/user-list.tsx

@@ -157,9 +157,7 @@ export function UserList() {
                   ) : (
                     <Power className="h-4 w-4" />
                   )}
-                  <span className="sr-only">
-                    {row.original.isActive ? 'Disable' : 'Enable'}
-                  </span>
+                  <span className="sr-only">{row.original.isActive ? 'Disable' : 'Enable'}</span>
                 </Button>
               }
               title={row.original.isActive ? 'Disable user' : 'Enable user'}