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/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