updated the collision for jumps and terrain

PLAYTEST_NOTES.md

@@ -1269,3 +1269,27 @@ Vite's existing large-chunk advisory remains informational.
 - Verification: 71 focused catalog/store/repository/dungeon/ability/party tests
   passed, all 28 avatar tests passed, and `npm run build` completed
   successfully.
+
+# 2026-08-16 — Deadmines party terrain following and vertical animation tolerance
+
+- Entered The Deadmines as the saved Human Priest and selected **Attack**.
+  The player crossed 43 m of uneven mine-floor and rail terrain; the tank and
+  a damage companion remained visibly beside the player instead of waiting for
+  the 12 m stuck-recall threshold. All four companion world labels remained in
+  the live scene, and no automatic party recall was observed.
+- The character maintained ordinary ground locomotion over small collision
+  height changes. Focused timing coverage confirms that terrain gaps shorter
+  than 100 ms neither enter the falling state nor trigger a landing animation,
+  while intentional jumps and sustained falls still present immediately/after
+  the grace period and land once.
+- The saved roster preview rendered the complete Human body and starter staff;
+  the in-dungeon view rendered the player silhouette, nearby companions, the
+  Deadmines environment, and HUD.
+- Browser diagnostics contained no errors. The existing third-party
+  initialization deprecation warning remained non-blocking.
+- Evidence: `playtest-artifacts/party-terrain-roster-2026-08-16.png`,
+  `playtest-artifacts/deadmines-party-terrain-2026-08-16.png`, and
+  `playtest-artifacts/deadmines-party-follow-view-2026-08-16.png`.
+- Verification: 38 focused party/pathing/jump/animation tests passed, all 28
+  avatar tests passed, and `npm run build` completed successfully with 954
+  modules transformed. The existing large-chunk advisory remains informational.