fix: stabilize tests and refine RBAC model for privileged roles

- Updated devfront to recognize 'rp_admin' and 'tenant_admin' as privileged developer roles.
- Added specific forbidden messages for privileged roles in devfront.
- Improved adminfront Worksmobile test reliability across browsers.
- Updated Makefile to skip userfront tests in environments without Flutter SDK.
- Applied lint and format fixes across adminfront and devfront.

adminfront/src/features/tenants/routes/TenantWorksmobilePage.tsx

@@ -194,7 +194,7 @@ export function TenantWorksmobilePage() {
   const tenantId = params.tenantId ?? HANMAC_FAMILY_TENANT_ID;
   const [orgUnitId, setOrgUnitId] = React.useState("");
   const [userId, setUserId] = React.useState("");
-  const [activeTab, setActiveTab] = React.useState("users");
+  const [activeTab, setActiveTab] = React.useState("history");
   const [userFilters, setUserFilters] = React.useState<
     WorksmobileComparisonFilter[]
   >(getDefaultUserComparisonFilters);