feat: add Stop N Go game mode manager with phase transitions, HUD, traffic light visuals, and dynamic arena generation.

scripts/managers/stop_n_go_manager.gd

@@ -11,6 +11,7 @@ enum Phase {GO, STOP}
 
 const GO_DURATION: float = 12.0
 const STOP_DURATION: float = 6.0
+const REQUIRED_GOALS: int = 2
 
 var current_phase: Phase = Phase.GO
 var phase_timer: float = GO_DURATION
@@ -30,6 +31,13 @@ var phase_label: Label
 var mission_label: Label
 var red_tint_overlay: ColorRect
 
+# Traffic Light / StopTimer Visuals
+var stop_timer_node: PanelContainer
+var stop_segments: Array[Panel] = []
+var lit_style: StyleBoxFlat
+var dim_style: StyleBoxFlat
+var red_style: StyleBoxFlat
+
 func _ready():
 	set_process(false)
 	_setup_hud()
@@ -83,8 +91,10 @@ func _process(delta):
 	if not is_active:
 		return
 		
+	# Decrement timer locally for all peers (smoother HUD than waiting for RPC)
+	phase_timer -= delta
+		
 	if multiplayer.is_server():
-		phase_timer -= delta
 		if phase_timer <= 0:
 			if current_phase == Phase.GO:
 				_start_phase(Phase.STOP)
@@ -112,13 +122,68 @@ func _update_hud_visuals():
 		# Get count from GoalsCycleManager (Source of truth for PlayerBoardLabel)
 		var completed_count = goals_cycle_manager.player_goal_counts.get(my_id, 0) if goals_cycle_manager else 0
 		
-		mission_label.text = "GOALS (%d/3)" % completed_count
+		mission_label.text = "GOALS (%d/%d)" % [completed_count, REQUIRED_GOALS]
 		
-		if completed_count >= 3:
+		if completed_count >= REQUIRED_GOALS:
 			mission_label.text = "ALL GOALS COMPLETE!\nREACH THE FINISH!"
 			mission_label.add_theme_color_override("font_color", Color.GOLD)
 		else:
 			mission_label.add_theme_color_override("font_color", Color.WHITE)
+			
+	# Update StopTimer (Traffic Light)
+	_update_stop_timer_visuals()
+
+func _update_stop_timer_visuals():
+	if not stop_timer_node:
+		# Try to find it once
+		var main = get_node_or_null("/root/Main")
+		if main:
+			stop_timer_node = main.get_node_or_null("StopTimer")
+			if stop_timer_node:
+				var hbox = stop_timer_node.get_node_or_null("HBox")
+				if hbox:
+					stop_segments.clear()
+					for i in range(4):
+						var seg = hbox.get_node_or_null("Segment%d" % i)
+						if seg: stop_segments.append(seg)
+				
+				# Prepare styles
+				lit_style = StyleBoxFlat.new()
+				lit_style.bg_color = Color.YELLOW
+				lit_style.border_width_left = 2
+				lit_style.border_width_top = 2
+				lit_style.border_width_right = 2
+				lit_style.border_width_bottom = 2
+				lit_style.border_color = Color(1.0, 1.0, 1.0, 0.5)
+				
+				dim_style = StyleBoxFlat.new()
+				dim_style.bg_color = Color(0.1, 0.1, 0.1, 0.8) # Dark dim
+				
+				red_style = StyleBoxFlat.new()
+				red_style.bg_color = Color.RED
+				red_style.border_width_left = 2
+				red_style.border_width_top = 2
+				red_style.border_width_right = 2
+				red_style.border_width_bottom = 2
+				red_style.border_color = Color(1.0, 0.5, 0.5, 0.5)
+	
+	if not stop_timer_node: return
+
+	# ALWAYS VISIBLE in Stop n Go mode
+	stop_timer_node.visible = true
+
+	if current_phase == Phase.GO:
+		# GO Phase: All dim unless in last 4 seconds
+		for i in range(stop_segments.size()):
+			var threshold = 4.0 - i
+			if phase_timer <= threshold:
+				stop_segments[i].add_theme_stylebox_override("panel", lit_style)
+			else:
+				stop_segments[i].add_theme_stylebox_override("panel", dim_style)
+	else:
+		# STOP Phase: All Red
+		for seg in stop_segments:
+			seg.add_theme_stylebox_override("panel", red_style)
 
 func activate_client_side():
 	is_active = true
@@ -355,7 +420,7 @@ func check_win_condition(player_id: int, position: Vector2i) -> bool:
 	if position.x < finish_line_x:
 		return false
 		
-	# 2. Must have 3 Goal Completions (tracked by GoalsCycleManager)
+	# 2. Must have enough Goal Completions (tracked by GoalsCycleManager)
 	var main = get_node_or_null("/root/Main")
 	if not main: return false
 	
@@ -364,14 +429,14 @@ func check_win_condition(player_id: int, position: Vector2i) -> bool:
 	
 	var completed_count = goals_cycle_manager.player_goal_counts.get(player_id, 0)
 	
-	if completed_count >= 3:
+	if completed_count >= REQUIRED_GOALS:
 		print("[StopNGo] Player %d REACHED FINISH with %d goals complete!" % [player_id, completed_count])
 		return true
 	else:
 		# Inform the player locally if they reach the end without goals
 		var player_node = main.get_node_or_null(str(player_id))
 		if player_node:
-			NotificationManager.send_message(player_node, "Incomplete! Achieve 3 goals (x3) to win!", NotificationManager.MessageType.WARNING)
+			NotificationManager.send_message(player_node, "Incomplete! Achieve %d goals (x%d) to win!" % [REQUIRED_GOALS, REQUIRED_GOALS], NotificationManager.MessageType.WARNING)
 		
-		print("[StopNGo] Player %d reached finish but goal count too low: %d/3" % [player_id, completed_count])
+		print("[StopNGo] Player %d reached finish but goal count too low: %d/%d" % [player_id, completed_count, REQUIRED_GOALS])
 		return false