feat: add circular time-of-day dial to UI

A 60x60 circular dial drawn at the top-center of the screen shows the current position in the day/night cycle. A filled arc sweeps clockwise from the top; the color transitions from dark blue (night) through orange (dawn), gold (day), and pink (dusk). A small glow dot marks the leading tip; a phase label (Night/Dawn/Day/Dusk) sits below. Redraws only when the cycle fraction changes. References DayNightCycle via node_path so it stays in sync with the environment lighting.

main.tscn

@@ -9,6 +9,7 @@
 [ext_resource type="Script" uid="uid://bbwol3mrjgn2x" path="res://world/active_world_adapter.gd" id="9_adapter"]
 [ext_resource type="Script" path="res://simulation/persistence/SaveSlotController.gd" id="10_save"]
 [ext_resource type="PackedScene" path="res://world/jajce/JajceWorld.tscn" id="11_jajce"]
+[ext_resource type="Script" path="res://world/ui/time_dial.gd" id="12_timedial"]
 
 [sub_resource type="CapsuleShape3D" id="CapsuleShape3D_o5qli"]
 radius = 0.4
@@ -124,3 +125,12 @@ layout_mode = 2
 theme_override_colors/font_color = Color(0.96, 0.91, 0.78, 1)
 theme_override_font_sizes/font_size = 15
 text = "Villager inspector"
+
+[node name="TimeDial" type="Control" parent="UI" node_paths=PackedStringArray("day_night_cycle")]
+layout_mode = 0
+offset_left = 880.0
+offset_top = 6.0
+offset_right = 940.0
+offset_bottom = 66.0
+script = ExtResource("12_timedial")
+day_night_cycle = NodePath("../JajceWorld/DayNightCycle")

world/ui/time_dial.gd

@@ -0,0 +1,93 @@
+extends Control
+
+@export var day_night_cycle: Node
+
+const SIZE_DIAL := 60.0
+const RING_RADIUS := 24.0
+const RING_THICKNESS := 4.0
+const GLOW_RADIUS := 2.5
+
+const COLOR_NIGHT := Color(0.12, 0.16, 0.42, 1)
+const COLOR_DAWN := Color(0.95, 0.5, 0.2, 1)
+const COLOR_DAY := Color(1, 0.84, 0.38, 1)
+const COLOR_DUSK := Color(0.9, 0.35, 0.2, 1)
+const COLOR_BG := Color(0.06, 0.06, 0.08, 0.65)
+
+var _last_fraction := -1.0
+var _last_color := Color.TRANSPARENT
+
+
+func _process(_delta: float) -> void:
+	var fraction := _cycle_fraction()
+	if not is_equal_approx(fraction, _last_fraction):
+		_last_fraction = fraction
+		queue_redraw()
+
+
+func _draw() -> void:
+	var center := Vector2(SIZE_DIAL / 2.0, SIZE_DIAL / 2.0)
+	var fraction := _last_fraction
+	if fraction < 0.0:
+		fraction = _cycle_fraction()
+		_last_fraction = fraction
+
+	var time_color := _time_color(fraction)
+
+	draw_circle(center, RING_RADIUS + 1.0, COLOR_BG)
+
+	var start_angle := -PI / 2.0
+	var end_angle := start_angle + fraction * TAU
+	draw_arc(center, RING_RADIUS, start_angle, end_angle, 48, time_color, RING_THICKNESS, true)
+
+	if fraction > 0.0:
+		var tip_dir := Vector2.from_angle(end_angle)
+		var tip_pos := center + tip_dir * RING_RADIUS
+		draw_circle(tip_pos, GLOW_RADIUS, time_color.lightened(0.3))
+
+	var label := _phase_label(fraction)
+	var font := ThemeDB.fallback_font
+	if font == null:
+		return
+	var font_size := 11
+	var text_size := font.get_string_size(label, HORIZONTAL_ALIGNMENT_CENTER, -1, font_size)
+	var text_x := (SIZE_DIAL - text_size.x) / 2.0
+	var text_y := SIZE_DIAL - text_size.y + 4.0
+	draw_string(font, Vector2(text_x, text_y), label, HORIZONTAL_ALIGNMENT_LEFT, -1, font_size, Color.WHITE)
+
+
+func _cycle_fraction() -> float:
+	if day_night_cycle == null:
+		return 0.0
+	var elapsed: float = day_night_cycle.get("elapsed") if "elapsed" in day_night_cycle else 0.0
+	var duration: float = (
+		day_night_cycle.get("cycle_duration_seconds")
+		if "cycle_duration_seconds" in day_night_cycle
+		else 240.0
+	)
+	if duration <= 0.0:
+		return 0.0
+	return fmod(elapsed / duration, 1.0)
+
+
+func _time_color(fraction: float) -> Color:
+	if fraction < 0.15:
+		return COLOR_NIGHT
+	if fraction < 0.3:
+		return COLOR_NIGHT.lerp(COLOR_DAWN, smoothstep(0.15, 0.3, fraction))
+	if fraction < 0.7:
+		return COLOR_DAY
+	if fraction < 0.85:
+		return COLOR_DAY.lerp(COLOR_DUSK, smoothstep(0.7, 0.85, fraction))
+	return COLOR_DUSK.lerp(COLOR_NIGHT, smoothstep(0.85, 1.0, fraction))
+
+
+func _phase_label(fraction: float) -> String:
+	if fraction < 0.1:
+		return "Night"
+	if fraction < 0.2:
+		return "Dawn"
+	if fraction < 0.65:
+		return "Day"
+	if fraction < 0.8:
+		return "Dusk"
+	return "Night"