fix: keep brand navigation in active workbench

frontend/src/store/modules/workbench-route.ts

@@ -0,0 +1,13 @@
+import type { RoleView } from '@/api/auth';
+
+const fallbackWorkbenchRoutes: Record<string, string> = {
+  PROJECT_MANAGER: '/workbench/project',
+  FINANCE_MANAGER: '/workbench/finance',
+  ARCHIVE_MANAGER: '/workbench/archive',
+  SYSTEM_ADMIN: '/governance/settings',
+};
+
+export function resolveWorkbenchRoute(currentRole: string | null, roles: RoleView[]): string {
+  const configured = roles.find((role) => role.code === currentRole)?.workbenchRoute?.trim();
+  return configured || fallbackWorkbenchRoutes[currentRole || ''] || '/role-select';
+}