scrypted: remove the pre-stream snapshot entirely

The prebuffered stream now paints in ~0.7s, so the takePicture→transform→POST
first-paint bridge was consistently slower than the video it was meant to
cover, while adding camera load and a stale-overpaint risk. Drop it: remove
pushSnapshot and its call, the shouldPaint gate, and the firstStreamFrameSeen
plumbing. On the slow paths (no/cold prebuffer) the panel holds its prior frame
until the stream's first frame lands. buildVf stays (used by the live path).

0 files changed, 0 insertions, 0 deletions