## Summary
Two desktop/tablet polish refinements to the product page hero's hero→AI
transition (`product-hero`).
### 1. Delay the Ask-AI panel reveal to after the wipe (`b638d600`)
The Ask-AI side panel used to reveal *during* the dark "wipe up" (keyed
to the morph `0.45 → 0.70`), so it competed with the rising black edge
and piled onto the heaviest motion phase — rough on weaker laptops.
It's now keyed to raw scroll progress over `[0.60, 0.70]` — the
previously-idle hold after the wipe settles at `0.55` — so it slides in
on its own beat once the eye has followed the black up. `morphProgress`
is pinned at `1` across the whole post-wipe stretch, so leaving the
morph clock was the only way to time the panel *after* the wipe. The
conversation playback moves with it, so the chat doesn't stream while
the panel is still `width: 0`.
### 2. Keep the AI heading to three lines below desktop (`8ae69a4b`)
The AI heading is the page's longest line. Below `md`, only the mobile
copy renders, where the measure was frozen at `360px` while the heading
font scales fluidly toward `md` — so on tablet widths the title crammed
onto four lines, recovering only at `921px` when the `672px` measure
kicks in.
Adds an `sm`-breakpoint measure step (`560px`) scoped to the AI heading;
the intro heading and the desktop measuring path keep their existing
`360/672` steps.
## Test plan
- `product-hero-scroll-model` jest suite updated and green (11/11),
including a new post-morph panel-timing test.
- Lint (`check-conventions` + `oxlint` + `oxfmt`) and typecheck green.
- Visually confirmed: the panel reveals after the wipe settles, and the
AI title holds three lines across tablet widths.
Abdullah.
1b4bddba6f