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feat(scroll): show which scroll speeds are smooth on this panel (#710)

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* feat(scroll): show which scroll speeds are smooth on this panel

The Vegas Scroll Speed slider now says what the panel will do with the
chosen speed and offers the nearest smooth ones to click. Backed by
scroll_config.speed_advice() and GET /api/v3/config/scroll-speed-advice,
which uses the refresh the display measured rather than the cap.

Also stops the default 50 px/s snapping to a stepped 48 px/s (2px every 5
refreshes, 24fps) on a 120Hz panel: the low-fps penalty in solve_crisp()
now loses to 60 or 40 px/s. 100Hz panels are unchanged.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

* fix(scroll): hint threw before its timer variables existed; count 25-30fps as stepped

The Vegas speed hint called refreshScrollSpeedHint() before the let
declarations it uses, so it never rendered (found on ledpi). And the
solver's low-fps penalty stopped at 25fps, which let a measured 125.7Hz
panel keep a 25.1fps 2px-every-5-refreshes scroll.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

* test: add the scroll-speed-advice route to the /api/v3 URL map snapshot

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-10-01 14:15:22 -04:00
committed by GitHub
co-authored by Claude Sonnet 5.5
parent 4ddc3a3620
commit 16b566e14f
8 changed files with 285 additions and 4 deletions
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@@ -112,6 +112,18 @@ guard the import, since the loader's version check is advisory).
processes, or turns the socket off with `off`. A non-root dev run uses a
private per-user path under the temp directory.
### Scroll speed
- The Vegas Scroll Speed slider now says what the panel will do with the speed
it is on, and offers the nearest smooth ones to click. Only speeds that advance
a whole number of pixels per refresh look smooth, and which those are depends
on the panel (`GET /api/v3/config/scroll-speed-advice`, built on
`scroll_config.speed_advice()`; it uses the refresh the display measured, not
the `limit_refresh_rate_hz` cap). The slider steps by 1 px/s instead of 5.
- The default 50 px/s no longer snaps to a stepped 48 px/s (2 px every 5
refreshes, 24 fps) on a 120 Hz panel: `solve_crisp()` now prefers 60 or 40 px/s,
which move one pixel at a time. 100 Hz panels are unaffected.
### Update channels
- Devices no longer pick up every merge to `main`. A new setting,