Fly the modals in with a swoosh instead of cutting to them

m.in (0..1 over TUNE.modalIn, 0.34 s) is the entrance clock, ticked inside
update()'s modal early-return — the one thing that animates while the world
is frozen. Icon and title fly in from the right trailing two ghost copies as
a speed streak, the body lines cascade in from the left one after another,
everything on easeOutBack so it overshoots and settles rather than
decelerating politely into place. The dim washes in over the first third. A
descending noise sweep on arrival (swish is parameterised now — same six
lines of Web Audio, opposite reading) and a low pock as it lands.

Every x is rounded: a fractional x on a nearest-neighbour scaled image
re-snaps its pixel columns, which is the boiling that once read as HUD
flicker.

Dismissal is gated on the entrance: while m.in < 1 dismissModal swallows the
gesture but doesn't clear the modal, so a tap already in the air when a popup
appears can't skip it — and swallowing rather than returning false is what
keeps that tap from falling through into a serve.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

HANDOFF.md

@@ -52,6 +52,15 @@ zombie. Getting caught = `G.mode='eaten'` = permadeath, and the run summary is t
   it, and the `pointerdown` dismisser is registered **only on `pointer: fine`** — on touch,
   pointerdown fires *before* touchstart, so a shared handler cleared the modal and let the
   touchstart underneath serve. `G.seen.<key>` gates first-time-only modals.
+  **`m.in` (0..1 over `TUNE.modalIn`) is the arcade entrance** and the ONE thing that animates behind
+  the freeze — it is ticked inside that same early-return, so it advances while nothing else does.
+  Icon and title fly in from the right (with a two-ghost speed streak), body lines cascade from the
+  left, all on `easeOutBack`; every x is `Math.round`ed, because a fractional x on a nearest-neighbour
+  scaled image re-snaps its pixel columns (the boiling that once read as HUD flicker). A modal with no
+  `in` field draws fully landed, so older/test call sites still work.
+  While `m.in < 1`, `dismissModal` **returns true without dismissing** — it swallows the gesture but
+  won't let a panic tap that was already mid-air skip a popup nobody has read. Returning false there
+  would drop that tap through into a serve instead.
 - **`UI` in config.js is the accent palette** (hot/warm/pick/cream/dim/bad/ball). Every HUD colour
   goes through it. Gore reds are deliberately NOT in it — the splatter stays loud.
 - **`F(size, bold)` in render.js builds every canvas font string.** Bare `monospace` resolves to