feat(web): add account list and form components

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/client/src/hooks/useAccounts.ts

@@ -0,0 +1,20 @@
+import { useState, useEffect, useCallback } from 'react';
+import { api } from '@/lib/api';
+import type { Account } from '@/types';
+
+export function useAccounts() {
+  const [accounts, setAccounts] = useState<Account[]>([]);
+  const [loading, setLoading] = useState(true);
+
+  const refresh = useCallback(() => {
+    api.listAccounts().then(setAccounts).finally(() => setLoading(false));
+  }, []);
+
+  useEffect(() => { refresh(); }, [refresh]);
+
+  const create = (data: Partial<Account>) => api.createAccount(data).then(refresh);
+  const update = (id: string, data: Partial<Account>) => api.updateAccount(id, data).then(refresh);
+  const remove = (id: string) => api.deleteAccount(id).then(refresh);
+
+  return { accounts, loading, refresh, create, update, remove };
+}