feat(web): mascot physics juice (bounce, skid, spring squash, hop) + typewriter speech bubble

plans/2026-07-20-mascot-physics-audit.md

@@ -1,6 +1,13 @@
 # 2026-07-20 — Mascot physics/window-interaction audit + improvement plan
 
-**Status:** P0–P2 implemented. P3 ("cool stuff") ideas remain open/undecided.
+**Status:** P0–P2 implemented. P3 partially implemented: the physics-feel
+round shipped (panic-flap cycle with speed scaling + jitter, soft
+terminal-velocity drag, one-bounce impact restitution, landing skid, wall
+ricochet, squash-and-stretch impact spring, air/drag tilt, walk bob,
+impact feather-poof particles, and a new idle-selectable `hop` behavior —
+all in `behavior.ts` + `Mascot.svelte`'s render layer, no new assets).
+The remaining P3 feature ideas (investigate badges, startle-and-flee, a
+"home" spot, round radial menu v2, distinct adult art) stay open.
 
 **Verification of the fixes** (re-ran this document's own instrumented
 tests against the fixed code):