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/main.tsx

@@ -3,6 +3,8 @@ import { createRoot } from "react-dom/client";
 import { BrowserRouter } from "react-router-dom";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { AuthProvider } from "./context/AuthContext";
+import { ToastProvider } from "./components/Toast";
+import ErrorBoundary from "./components/ErrorBoundary";
 import App from "./App";
 import "./index.css";
 
@@ -14,12 +16,16 @@ const queryClient = new QueryClient({
 
 createRoot(document.getElementById("root")!).render(
   <StrictMode>
-    <QueryClientProvider client={queryClient}>
-      <BrowserRouter>
-        <AuthProvider>
-          <App />
-        </AuthProvider>
-      </BrowserRouter>
-    </QueryClientProvider>
+    <ErrorBoundary>
+      <QueryClientProvider client={queryClient}>
+        <BrowserRouter>
+          <AuthProvider>
+            <ToastProvider>
+              <App />
+            </ToastProvider>
+          </AuthProvider>
+        </BrowserRouter>
+      </QueryClientProvider>
+    </ErrorBoundary>
   </StrictMode>,
 );