Add user authentication and dynamic feature/category inputs

Implement Keycloak authentication, protected routes, and add combobox and autocomplete components for tool categories and features.

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artifacts/toolrate/src/hooks/use-auth.ts

@@ -0,0 +1,32 @@
+import { useGetMe } from "@workspace/api-client-react";
+
+export type AuthUser = {
+  sub: string;
+  email?: string | null;
+  name?: string | null;
+  preferredUsername?: string | null;
+};
+
+export function useAuth() {
+  const { data: user, isLoading, error } = useGetMe({
+    query: {
+      retry: false,
+      staleTime: 1000 * 60 * 5,
+    },
+  });
+
+  const isAuthenticated = !!user && !error;
+
+  function login(returnTo?: string) {
+    const url = returnTo
+      ? `/api/auth/login?returnTo=${encodeURIComponent(returnTo)}`
+      : "/api/auth/login";
+    window.location.href = url;
+  }
+
+  function logout() {
+    window.location.href = "/api/auth/logout";
+  }
+
+  return { user: isAuthenticated ? user : null, isLoading, isAuthenticated, login, logout };
+}