fix: migration 036 — delete old channels before altering constraint + remove TravelLine refs + hide hotel_admin from roles tab

src/pages/UsersPage.tsx

@@ -445,8 +445,10 @@ function UserModal({
 // ── Roles & Permissions Tab ────────────────────────────────────────────────────
 
 function RolesTab() {
-  const [roles, setRoles] = useState<RolePermissions[]>(INITIAL_ROLE_PERMISSIONS)
-  const [selectedRoleId, setSelectedRoleId] = useState<string>(INITIAL_ROLE_PERMISSIONS[0].id)
+  // hotel_admin always has all permissions — excluded from the editable list
+  const editableRoles = INITIAL_ROLE_PERMISSIONS.filter(r => r.id !== 'rp_hotel_admin')
+  const [roles, setRoles] = useState<RolePermissions[]>(editableRoles)
+  const [selectedRoleId, setSelectedRoleId] = useState<string>(editableRoles[0].id)
   const [newRoleName, setNewRoleName] = useState('')
   const [addingRole, setAddingRole] = useState(false)
   const [deleteId, setDeleteId] = useState<string | null>(null)