请求 JSON
https://api.openai.com/v1/images/generations{
"mode": "generation",
"provider": {
"base": "https://api.openai.com",
"imageEndpoint": "/v1/images/generations",
"key": "",
"model": "gpt-image-2"
},
"prompt": "",
"size": "1024x1024",
"quality": "auto",
"n": 1
}