feat(phase-9): implement MVP polishing and closure

T-032: User management admin panel - backend users router with CRUD, frontend UsersPage with modals

T-033: Audit log viewer - backend audit router with filters/pagination, frontend AuditLogPage

T-034: Global error handling - ErrorBoundary, LoadingSpinner, ErrorMessage, Toast components

T-035: Backend tests - pytest setup with SQLite, tests for health/auth/techniques/tests

T-036: Documentation - Updated README with testing section, created docs/API.md

frontend/src/components/Sidebar.tsx

@@ -4,6 +4,8 @@ import {
   Shield,
   FlaskConical,
   Settings,
+  Users,
+  FileText,
 } from "lucide-react";
 import { useAuth } from "../context/AuthContext";
 
@@ -14,6 +16,8 @@ const baseLinks = [
 ];
 
 const adminLinks = [
+  { to: "/users", label: "Users", icon: Users },
+  { to: "/audit", label: "Audit Log", icon: FileText },
   { to: "/system", label: "System", icon: Settings },
 ];