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/components/common/DeveloperAccessRequestCard.test.tsx

@@ -1,5 +1,5 @@
-import { act } from "react-dom/test-utils";
 import { createRoot } from "react-dom/client";
+import { act } from "react-dom/test-utils";
 import { afterEach, describe, expect, it, vi } from "vitest";
 import { DeveloperAccessRequestCard } from "./DeveloperAccessRequestCard";
 

devfront/src/components/common/ForbiddenMessage.tsx

@@ -34,6 +34,16 @@ export function ForbiddenMessage({ resourceToken }: Props) {
         "Standard user accounts can use this feature only when an operational or administrative relationship is granted for the target application. Request access from an administrator if needed.",
       );
     }
+  } else if (role === "rp_admin") {
+    explanation = t(
+      "msg.dev.forbidden.rp_admin",
+      "RP administrators can only access resources for their assigned applications.",
+    );
+  } else if (role === "tenant_admin") {
+    explanation = t(
+      "msg.dev.forbidden.tenant_admin",
+      "Tenant administrator permissions are not configured correctly or have expired.",
+    );
   }
 
   const resourceLabel =