docs: document winner confetti celebration

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tiennm99 committed 2026-07-25 01:17:18 +07:00
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@@ -31,6 +31,9 @@ Response is `image/gif` with winner metadata headers:
`X-Wheel-Winner` is URL-encoded so non-ASCII labels are safe in HTTP headers.
The GIF includes a winner celebration with a deterministic confetti burst
during the hold phase, using colors from the chosen theme palette.
## Local
Install dependencies and Chromium once: