NEON-29: Gate descend lip snap on debounced ledge peel.

DESCEND_LIP_SNAP_CAP (0.1) ran whenever goal was below feet by geometry,
independent of probe debounce. Feet_y noise on treads toggled 0.32 vs 0.1
snap and caused ~2–3 cm Y jitter. Apply lip cap only when debounced peel is
armed and not in peel suspend; otherwise keep FLOOR_SNAP_MOVING.

client/scripts/player.gd

@@ -567,9 +567,17 @@ func _walk_floor_snap_length(
 			# fight the approach stairs with snap ↔ assist oscillation.
 			if _auth_walk_goal.y > feet_y + 0.12 and _step_assist_wallish_blocks(want):
 				return WALK_STEP_ASSIST_SNAP
-		if (
+		# Lip cap only while debounced peel is armed. Otherwise [code]feet_y[/code] wobble on treads
+		# crosses [code]feet_y > goal + 0.08[/code] / margins → 0.32 m vs 0.1 m snap flips each tick
+		# (~2–3 cm body Y jitter on green stairs, x≈19).
+		var descend_lip_geom: bool = (
 			_auth_walk_goal.y < feet_y - DESCEND_GOAL_Y_MARGIN
 			and feet_y > _auth_walk_goal.y + 0.08
+		)
+		if (
+			descend_lip_geom
+			and _walk_debounced_wants_ledge_peel
+			and not _walk_peel_suspend_near_goal(feet_y, horiz_dist)
 		):
 			return minf(FLOOR_SNAP_MOVING, DESCEND_LIP_SNAP_CAP)
 	return FLOOR_SNAP_MOVING