* Fix v3 Songs A–Z rail: reliable taps, precise drag, hittable size
Follow-up to #634. Three rail bugs reported on macOS + Windows (0.3.0,
2026-06-29 — =Scr4tch=, MajorMokoto):
- Taps often did nothing ("clicked O, nothing happened"). pointerdown
calls setPointerCapture, after which the browser retargets the
follow-up click to the rail container, so the click handler's
closest('.v3-azrail-letter') resolved null and a plain tap (no
pointermove) had no other path. Drive the jump from pointerdown
itself; reduce the click handler to keyboard activation only
(e.detail === 0, Enter/Space).
- A drag landed short of the release ("where you release isn't where
you get sent"). Every letter crossed fired jumpToLetter with
behavior:'smooth'; stacked smooth-scroll animations over the
virtualized grid lagged and settled imprecisely. jumpToLetter now
takes a smooth flag and scrolls instantly ('auto') while scrubbing,
animating only discrete taps/keyboard jumps, so the grid tracks the
finger and the release lands on the let-go letter.
- The rail was too small at 1440p and didn't scale. Letters were a
fixed .62rem glued at right:2px (~13px-tall target). They now scale
with the viewport (clamp(.72rem, 1.4vh, 1.05rem)), sit off the edge
with taller/wider equal-width hit targets and a hover/active
highlight so the scrub target is visible.
Keyboard arrow-nav and present-letter gating are unchanged. Tests:
tests/js/v3_az_rail.test.js gains pointerdown-seek, keyboard-only click
guard, and instant-vs-smooth assertions (809 JS tests; the 13
pre-existing unrelated failures are unchanged).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QbexxfTt8q2tAn436MqGWF
* fix(v3): ignore non-primary buttons on A–Z rail pointerdown (PR #653 review)
Right- or middle-clicking the A–Z rail (or a secondary multi-touch
pointer) no longer triggers a seek; only the primary tap/drag scrubs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: byrongamatos <xasiklas@gmail.com>
