Tune the flashlight beam and refresh affected captures

Widen and lengthen the additive beam cone and raise its near-end opacity so the
night flashlight reads on screen. Regenerate the staged captures; compare stays
11 good / 0 bad, headless 227/227.

src/game/game_manager.gd

@@ -201,9 +201,9 @@ func _build_guard() -> GuardController:
 	var beam := MeshInstance3D.new()
 	beam.name = "Beam"
 	var cone := CylinderMesh.new()
-	cone.top_radius = 1.0
-	cone.bottom_radius = 0.05
-	cone.height = 5.5
+	cone.top_radius = 1.35
+	cone.bottom_radius = 0.04
+	cone.height = 7.0
 	cone.radial_segments = 16
 	cone.rings = 1
 	cone.cap_top = false
@@ -211,7 +211,7 @@ func _build_guard() -> GuardController:
 	beam.mesh = cone
 	# Cylinder axis is +Y; -90° about X aims the wide end along -Z (forward).
 	beam.rotation_degrees = Vector3(-90, 0, 0)
-	beam.position = Vector3(0, 0, -3.65)
+	beam.position = Vector3(0, 0, -3.9)
 	beam.material_override = Materials.light_beam()
 	beam.cast_shadow = GeometryInstance3D.SHADOW_CASTING_SETTING_OFF
 	flashlight.add_child(beam)

src/game/materials.gd

@@ -140,8 +140,8 @@ static func light_beam() -> StandardMaterial3D:
 	mat.depth_draw_mode = BaseMaterial3D.DEPTH_DRAW_DISABLED
 	mat.albedo_color = Color(1.0, 0.95, 0.82, 1.0)
 	var fade := Gradient.new()
-	fade.set_color(0, Color(1.0, 0.95, 0.82, 0.0))
-	fade.add_point(0.18, Color(1.0, 0.95, 0.82, 0.22))
+	fade.set_color(0, Color(1.0, 0.95, 0.82, 0.08))
+	fade.add_point(0.15, Color(1.0, 0.95, 0.82, 0.5))
 	fade.set_color(fade.get_point_count() - 1, Color(1.0, 0.95, 0.82, 0.0))
 	var ramp := GradientTexture1D.new()
 	ramp.gradient = fade