feat: add GUI enhancement for Leaderboard, and Timer

scenes/main.gd

@@ -456,7 +456,7 @@ func _setup_global_match_timer_ui():
 	# Label
 	var label = Label.new()
 	label.name = "TimerLabel"
-	label.text = "3:00"
+	label.text = "03:00"
 	label.add_theme_font_size_override("font_size", 28)
 	label.add_theme_color_override("font_color", Color(0.647, 0.996, 0.224))
 	label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
@@ -1927,7 +1927,7 @@ func _on_global_timer_updated(time_remaining: float):
 		if timer_label:
 			var minutes = int(time_remaining) / 60
 			var seconds = int(time_remaining) % 60
-			timer_label.text = "%d:%02d" % [minutes, seconds]
+			timer_label.text = "%02d:%02d" % [minutes, seconds]
 			
 			# Trigger countdown animations (30s and 15s)
 			if int(time_remaining) == 30 and int(time_remaining + 0.1) > 30: