=== Test 1: Single string q === HTTP: 200 Response: {"translatedText":"哈罗"} === Test 2: Array q === HTTP: 200 Response: {"translatedText":["哈罗","世界","早,早,早,早,早,早,早,早,早,早"]} === Test 3: Real page text via batch === Found 2 headings Payload sample: {"q":["slide rail","Ceramics"],"source":"en","target":"zh","format":"text"}... HTTP: 200 Response: {"translatedText":["滑动铁路","陶瓷器"]}