Fix OpenAI image input schema

src/main/kotlin/com/android/trisolarisserver/component/OpenAIVisionClient.kt

@@ -45,15 +45,13 @@ class OpenAIVisionClient(
                         ),
                         mapOf(
                             "type" to "input_image",
-                            "image_url" to mapOf(
-                                "url" to imageUrl,
+                            "image_url" to imageUrl,
                             "detail" to "high"
                         )
                     )
                 )
             )
         )
-        )
 
         val headers = HttpHeaders()
         headers.contentType = MediaType.APPLICATION_JSON