feat: add 'Пройти тест' button to test list table

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

frontend/src/pages/TestList/index.tsx

@@ -1,4 +1,4 @@
-import { PlusOutlined } from '@ant-design/icons'
+import { PlayCircleOutlined, 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'
@@ -58,11 +58,21 @@ export default function TestList() {
     {
       title: '',
       key: 'actions',
-      width: 90,
+      width: 200,
       render: (_: unknown, record: TestListItem) => (
-        <Button size="small" onClick={() => navigate(`/tests/${record.id}`)}>
-          Открыть
-        </Button>
+        <Space>
+          <Button size="small" onClick={() => navigate(`/tests/${record.id}`)}>
+            Открыть
+          </Button>
+          <Button
+            size="small"
+            type="primary"
+            icon={<PlayCircleOutlined />}
+            onClick={() => navigate(`/tests/${record.id}/take`)}
+          >
+            Пройти тест
+          </Button>
+        </Space>
       ),
     },
   ]