feat: Sprint 1 — infrastructure + test creation

Backend:
- FastAPI + SQLAlchemy 2.0 async + Alembic
- Models: Test, Question, Answer
- API: GET /api/tests, GET /api/tests/{id}, POST /api/tests
- Pydantic validation: min 7 questions, min 3 answers, ≥1 correct

Frontend:
- React 18 + TypeScript + Vite + Ant Design + TanStack Query
- Pages: TestList, TestCreate (nested Form.List), TestDetail

Infrastructure:
- Docker Compose: db (postgres:16), backend, frontend, nginx
- Nginx: /api/ → FastAPI, / → Vite dev server with HMR
- Alembic migration 001_init: tests, questions, answers tables
- entrypoint.sh: wait for db, migrate, start uvicorn

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/pages/TestList/index.tsx

@@ -0,0 +1,98 @@
+import { PlusOutlined } from '@ant-design/icons'
+import { useQuery } from '@tanstack/react-query'
+import { Button, Space, Spin, Table, Tag, Typography } from 'antd'
+import type { ColumnsType } from 'antd/es/table'
+import { useNavigate } from 'react-router-dom'
+
+import { TestListItem, testsApi } from '../../api/tests'
+
+const { Title } = Typography
+
+export default function TestList() {
+  const navigate = useNavigate()
+
+  const { data: tests = [], isLoading } = useQuery({
+    queryKey: ['tests'],
+    queryFn: () => testsApi.list().then((r) => r.data),
+  })
+
+  const columns: ColumnsType<TestListItem> = [
+    {
+      title: 'Название',
+      dataIndex: 'title',
+      key: 'title',
+      render: (text: string, record: TestListItem) => (
+        <a onClick={() => navigate(`/tests/${record.id}`)}>{text}</a>
+      ),
+    },
+    {
+      title: 'Вопросов',
+      dataIndex: 'questions_count',
+      key: 'questions_count',
+      width: 100,
+      align: 'center',
+    },
+    {
+      title: 'Порог зачёта',
+      dataIndex: 'passing_score',
+      key: 'passing_score',
+      width: 130,
+      align: 'center',
+      render: (score: number) => `${score}%`,
+    },
+    {
+      title: 'Таймер',
+      dataIndex: 'time_limit',
+      key: 'time_limit',
+      width: 110,
+      align: 'center',
+      render: (limit: number | null) => (limit ? `${limit} мин` : '—'),
+    },
+    {
+      title: 'Создан',
+      dataIndex: 'created_at',
+      key: 'created_at',
+      width: 130,
+      render: (date: string) => new Date(date).toLocaleDateString('ru-RU'),
+    },
+    {
+      title: '',
+      key: 'actions',
+      width: 90,
+      render: (_: unknown, record: TestListItem) => (
+        <Button size="small" onClick={() => navigate(`/tests/${record.id}`)}>
+          Открыть
+        </Button>
+      ),
+    },
+  ]
+
+  if (isLoading) {
+    return <Spin size="large" style={{ display: 'block', margin: '48px auto' }} />
+  }
+
+  return (
+    <div style={{ maxWidth: 1000, margin: '0 auto', padding: 24 }}>
+      <Space style={{ width: '100%', justifyContent: 'space-between', marginBottom: 16 }}>
+        <Title level={2} style={{ margin: 0 }}>
+          Тесты
+        </Title>
+        <Button
+          type="primary"
+          icon={<PlusOutlined />}
+          onClick={() => navigate('/tests/create')}
+        >
+          Создать тест
+        </Button>
+      </Space>
+
+      <Table
+        dataSource={tests}
+        columns={columns}
+        rowKey="id"
+        locale={{ emptyText: 'Тестов пока нет. Создайте первый!' }}
+        pagination={{ pageSize: 20 }}
+      />
+    </div>
+  )
+}