feat: sync visual day-night cycle with simulation clock

DayNightCycle now reads time_of_day from SimulationManager group node, falling back to self-tracked elapsed for lookdev scenes. Simulation starts at 06:00 morning (tick 50) by default. TimeDial reads directly from SimulationManager and displays HH:MM format with a 24-hour dial arc. Removed initial_cycle override from JajceLookdev.

world/jajce/JajceLookdev.tscn

@@ -7,9 +7,6 @@
 
 [node name="JajceWorld" parent="." instance=ExtResource("1_world")]
 
-[node name="DayNightCycle" parent="JajceWorld" index="9"]
-initial_cycle = 0.38
-
 [node name="BeautyCamera" type="Camera3D" parent="."]
 position = Vector3(44, 34, 44)
 current = true

world/jajce/day_night_cycle.gd

@@ -1,7 +1,7 @@
 extends Node
 
 @export var cycle_duration_seconds := 240.0
-@export_range(0.0, 1.0, 0.01) var initial_cycle := 0.35
+@export_range(0.0, 1.0, 0.01) var initial_cycle := 0.25
 @export var directional_light: DirectionalLight3D
 @export var world_environment: WorldEnvironment
 
@@ -36,19 +36,26 @@ const SUNRISE_LIGHT_COLOR := Color(1, 0.6, 0.45, 1)
 const SUNRISE_SUNSET_ENERGY := 0.8
 
 var elapsed := 0.0
+var _simulation_node: Node
 
 
 func _ready() -> void:
-	elapsed = cycle_duration_seconds * initial_cycle
-	_apply_light_rotation(initial_cycle)
-	_apply_environment(initial_cycle)
+	_simulation_node = get_tree().get_first_node_in_group("simulation_manager")
+	if _simulation_node == null:
+		elapsed = cycle_duration_seconds * initial_cycle
+		_apply_light_rotation(initial_cycle)
+		_apply_environment(initial_cycle)
 
 
-func _process(delta: float) -> void:
-	elapsed += delta
-	if elapsed >= cycle_duration_seconds:
-		elapsed = fmod(elapsed, cycle_duration_seconds)
-	var cycle := elapsed / cycle_duration_seconds
+func _process(_delta: float) -> void:
+	var cycle: float
+	if _simulation_node != null and "clock" in _simulation_node:
+		cycle = _simulation_node.clock.time_of_day()
+	else:
+		elapsed += _delta
+		if elapsed >= cycle_duration_seconds:
+			elapsed = fmod(elapsed, cycle_duration_seconds)
+		cycle = elapsed / cycle_duration_seconds
 	_apply_light_rotation(cycle)
 	_apply_environment(cycle)