prepare_screenshot_upload
Prepare screenshot upload
Start a screenshot set and get one upload URL per screenshot. Step 1 of 3. Pick the app's key screens — one per core feature, in roughly the order a new user would care about them — captured with realistic content. Avoid empty states, onboarding walls, permission dialogs, debug banners and lorem ipsum: the headlines are written from what is on screen. Upload each file with an HTTP PUT of the raw bytes to its URL (the response includes ready-to-run curl commands). URLs are valid for 2 hours; PUT to the same slot again to replace a file. Then call generate_screenshot_set with the returned set_id.
screenshot_count必填