Visual polish pass (v0.2.0): phase lighting, street lamps, marquee, dressing, night screenshots

- Phase-based lighting: sun direction/energy/color, ProceduralSkyMaterial
  gradient, and ambient per shift phase (GameManager.PHASE_LIGHTING),
  applied on phase transitions and shift start
- WorldBuilder: street lamp poles with emissive bulbs + OmniLights,
  set_night_mode(), glowing STEP LINE marquee (Label3D + emissive bars),
  crosswalk stripes, planters, low-poly street trees
- NPC avatars: per-seed height/brightness variation (deterministic LCG)
- Denser routine traffic probabilities
- capture_screenshots.gd: fast-forward to LATE phase and capture night set;
  README gallery is now 2x3 day+night; docs/screenshots regenerated
- Version bumped to 0.2.0; build/ artifacts rebuilt; Linux binary smoke-tested
- New headless tests for phased lighting config and street dressing (56 total)

src/game/game_manager.gd

@@ -27,6 +27,35 @@ var door := DoorState.new()
 var flashlight_on := false
 var coordinator: ShiftCoordinator = null
 var guard: GuardController = null
+var _sun: DirectionalLight3D = null
+var _env_node: WorldEnvironment = null
+var _sky: ProceduralSkyMaterial = null
+var _last_phase: int = -1
+
+## Per-phase lighting looks for the sun, sky, and ambient (PLAN.md: shift
+## structure — phase-based lighting). Night phases switch street lamps on.
+const PHASE_LIGHTING := {
+	Rules.Phase.EARLY: {
+		"sun_energy": 1.2, "sun_angle": -50.0, "sun_color": Color(1.0, 0.98, 0.92),
+		"sky_top": Color(0.32, 0.55, 0.95), "sky_horizon": Color(0.82, 0.88, 0.95),
+		"sky_ground": Color(0.45, 0.5, 0.55), "ambient": Color(0.75, 0.78, 0.85), "night": false,
+	},
+	Rules.Phase.MIDDAY: {
+		"sun_energy": 1.5, "sun_angle": -62.0, "sun_color": Color(1.0, 1.0, 0.98),
+		"sky_top": Color(0.3, 0.52, 0.95), "sky_horizon": Color(0.85, 0.9, 0.96),
+		"sky_ground": Color(0.5, 0.54, 0.58), "ambient": Color(0.85, 0.88, 0.95), "night": false,
+	},
+	Rules.Phase.EVENING: {
+		"sun_energy": 0.7, "sun_angle": -16.0, "sun_color": Color(1.0, 0.72, 0.5),
+		"sky_top": Color(0.62, 0.32, 0.35), "sky_horizon": Color(1.0, 0.68, 0.42),
+		"sky_ground": Color(0.3, 0.24, 0.3), "ambient": Color(0.55, 0.45, 0.5), "night": true,
+	},
+	Rules.Phase.LATE: {
+		"sun_energy": 0.05, "sun_angle": -8.0, "sun_color": Color(0.3, 0.35, 0.5),
+		"sky_top": Color(0.02, 0.03, 0.08), "sky_horizon": Color(0.1, 0.12, 0.2),
+		"sky_ground": Color(0.05, 0.05, 0.08), "ambient": Color(0.08, 0.09, 0.16), "night": true,
+	},
+}
 var hud: Hud = null
 var radio_panel: RadioPanel = null
 var shift_review_panel: ShiftReview = null
@@ -82,6 +111,8 @@ func _ready() -> void:
 
 	_build_ui()
 	coordinator.start()
+	_last_phase = -1
+	_apply_phase_lighting()
 
 var selected_scenario: VenueScenario = null
 
@@ -139,6 +170,8 @@ func restart_shift() -> void:
 	current_incident_npc_id = ""
 	coordinator.setup(selected_scenario, scenario_duration_s, 4242)
 	coordinator.start()
+	_last_phase = -1
+	_apply_phase_lighting()
 
 var inspector_current_events: Array = []
 
@@ -160,17 +193,40 @@ func _build_ui() -> void:
 	shift_review_panel.restart_requested.connect(restart_shift)
 
 func _ensure_lighting() -> void:
-	var sun := DirectionalLight3D.new()
-	sun.rotation_degrees = Vector3(-50, -30, 0)
-	sun.light_energy = 1.2
-	scene_root.add_child(sun)
-	var env_node := WorldEnvironment.new()
+	_sun = DirectionalLight3D.new()
+	_sun.name = "Sun"
+	_sun.rotation_degrees = Vector3(-50, -30, 0)
+	_sun.light_energy = 1.2
+	scene_root.add_child(_sun)
+	_env_node = WorldEnvironment.new()
 	var env := Environment.new()
-	env.ambient_light_source = Environment.AMBIENT_SOURCE_COLOR
-	env.ambient_light_color = Color(0.7, 0.7, 0.75)
+	env.background_mode = Environment.BG_SKY
+	_sky = ProceduralSkyMaterial.new()
+	var sky := Sky.new()
+	sky.sky_material = _sky
+	env.sky = sky
+	env.ambient_light_source = Environment.AMBIENT_SOURCE_SKY
 	env.ambient_light_energy = 0.5
-	env_node.environment = env
-	scene_root.add_child(env_node)
+	env.reflected_light_source = Environment.REFLECTION_SOURCE_SKY
+	_env_node.environment = env
+	scene_root.add_child(_env_node)
+
+## Apply the lighting look for the current shift phase (sun, sky, ambient,
+## street lamps). Runs on phase change and once at shift start.
+func _apply_phase_lighting() -> void:
+	var phase: int = coordinator.current_phase if coordinator else Rules.Phase.EARLY
+	var cfg: Dictionary = PHASE_LIGHTING.get(phase, PHASE_LIGHTING[Rules.Phase.EARLY])
+	if _sun:
+		_sun.light_energy = float(cfg.get("sun_energy", 1.0))
+		_sun.light_color = cfg.get("sun_color", Color.WHITE)
+		_sun.rotation_degrees = Vector3(float(cfg.get("sun_angle", -50.0)), -30, 0)
+	if _sky:
+		_sky.sky_top_color = cfg.get("sky_top", Color.BLUE)
+		_sky.sky_horizon_color = cfg.get("sky_horizon", Color.WHITE)
+		_sky.ground_bottom_color = cfg.get("sky_ground", Color(0.5, 0.5, 0.5))
+		_sky.ground_horizon_color = cfg.get("sky_horizon", Color.WHITE)
+	if world_builder:
+		world_builder.set_night_mode(cfg.get("night", false))
 
 func _spawn_npc(profile: NpcProfile, intent: String, _npc_id: String) -> void:
 	npc_counter += 1
@@ -652,6 +708,9 @@ func _physics_process(delta: float) -> void:
 	if coordinator == null or not coordinator.running:
 		return
 	coordinator.tick(delta)
+	if coordinator.current_phase != _last_phase:
+		_last_phase = coordinator.current_phase
+		_apply_phase_lighting()
 	hud.set_shift_state(coordinator, selected_scenario)
 	_perception_pass()