cardputer-adv-m5-button, m5stack-core-hello and c6-oled-i2c were the first
slug of their capture run and got the day's announcement overlay in the shot.
The capture script (velxio-prod) now pre-marks the day's post as shown and
strips any announcement overlay before the screenshot.
The post-deploy thumbnail bot captured examples for boards still hidden
behind launch control and pushed the files here; the images are blank
canvases but the filenames name unannounced products. The capture leak
is fixed at the source (the gallery's launch filter now checks
boardType/boardFilter), so these cannot regenerate.