NEON-29: Require forward floor probe to keep walk snap/gravity sane off ledges

Walk support used any ray hit under the foot disk, so the center sample
could still see the platform while the leading edge was over a void.
is_on_floor() stayed true from the lip, snap stayed strong, and vy was
zeroed each tick — horizontal skate until XZ arrival.

Now require a center hit plus at least one forward-biased sample in the
movement direction when horizontal intent is non-zero; use velocity XZ
for probe direction so nav/path steering matches the rays.

client/scripts/player.gd

@@ -365,16 +365,30 @@ func _walk_ray_hit_up_floor(space: PhysicsDirectSpaceState3D, off_xz: Vector2) -
 	return n.dot(Vector3.UP) > WALK_SUPPORT_PROBE_MIN_UP_DOT
 
 
-## True if **any** sample under the foot disk hits walk-like ground within [member WALK_SUPPORT_PROBE_DEPTH].
-## Uses [param move_dir_xz] so the **leading** edge off a deck is checked (center-only rays stayed over mesh).
+## Walkable support for **continued** forward motion within [member WALK_SUPPORT_PROBE_DEPTH].
+## Requires a hit under the foot origin **and** at least one sample **ahead** in [param move_dir_xz]
+## (same construction as [method _walk_probe_xz_offsets]). If only the center hits while the leading
+## foot is over a void, [method CharacterBody3D.is_on_floor] can stay true from a lip — returning
+## true here would suppress gravity and keep moving snap until XZ arrival (ledge skate).
+## When [param move_dir_xz] is ~zero (idle / no horizontal intent), center-only is enough.
 func _walk_has_close_floor_probe_below(move_dir_xz: Vector2) -> bool:
 	var w3d := get_world_3d()
 	if w3d == null:
 		return true
 	var space: PhysicsDirectSpaceState3D = w3d.direct_space_state
+	if not _walk_ray_hit_up_floor(space, Vector2.ZERO):
+		return false
+	var len2: float = move_dir_xz.length_squared()
+	if len2 < 1e-10:
+		return true
+	var inv_len: float = 1.0 / sqrt(len2)
+	var md := Vector2(move_dir_xz.x * inv_len, move_dir_xz.y * inv_len)
 	for off2: Vector2 in _walk_probe_xz_offsets(move_dir_xz):
-		if _walk_ray_hit_up_floor(space, off2):
-			return true
+		if off2.length_squared() < 1e-12:
+			continue
+		if off2.dot(md) > 0.0:
+			if _walk_ray_hit_up_floor(space, off2):
+				return true
 	return false
 
 
@@ -922,9 +936,10 @@ func _physics_process(delta: float) -> void:
 	else:
 		_set_horizontal_velocity_toward(_auth_walk_goal, want_goal_h)
 
-	var walk_move_dir_xz := Vector2(want_goal_h.x, want_goal_h.z)
+	# Prefer actual horizontal velocity so probes match nav/path steering, not only click bearing.
+	var walk_move_dir_xz := Vector2(velocity.x, velocity.z)
 	if walk_move_dir_xz.length_squared() < 1e-10:
-		walk_move_dir_xz = Vector2(velocity.x, velocity.z)
+		walk_move_dir_xz = Vector2(want_goal_h.x, want_goal_h.z)
 
 	_apply_walk_air_gravity(delta, walk_move_dir_xz)
 	floor_snap_length = _walk_floor_snap_length(feet_y, want_goal_h, walk_move_dir_xz)