feat: simplify RBAC roles and remove dev role switcher

- Simplified RBAC system to two roles: super_admin and user.
- Removed tenant_admin and rp_admin roles across backend and frontend.
- Removed Dev Role Switcher feature from adminfront.
- Updated all handlers, middlewares, and navigation to reflect the new role model.
- Fixed backend build errors and updated tests.

devfront/src/lib/role.ts

@@ -1,12 +1,15 @@
 export function normalizeRole(rawRole: unknown): string {
   if (typeof rawRole !== "string") return "";
   const role = rawRole.trim().toLowerCase();
-  if (role === "tenant_member") return "user";
-  if (role === "admin") return "tenant_admin";
-  if (role === "superadmin") return "super_admin";
-  if (role === "tenantadmin") return "tenant_admin";
-  if (role === "rpadmin") return "rp_admin";
-  return role;
+
+  switch (role) {
+    case "super_admin":
+    case "superadmin":
+    case "super-admin":
+      return "super_admin";
+    default:
+      return "user";
+  }
 }
 
 export function resolveProfileRole(