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.

devfront/src/features/developer-access/developerAccessGate.ts

@@ -1,7 +1,7 @@
 import { useQuery } from "@tanstack/react-query";
 import {
-  fetchDeveloperRequestStatus,
   type DeveloperRequestStatus,
+  fetchDeveloperRequestStatus,
 } from "../../lib/devApi";
 
 export type DeveloperAccessGateState = {
@@ -12,7 +12,11 @@ export type DeveloperAccessGateState = {
 };
 
 function isPrivilegedDeveloperRole(profileRole: string) {
-  return profileRole === "super_admin";
+  return (
+    profileRole === "super_admin" ||
+    profileRole === "rp_admin" ||
+    profileRole === "tenant_admin"
+  );
 }
 
 export function resolveDeveloperAccessGate(