feat: Implement Portal Doors game mode with arena setup, dynamic portal connections, and timed events.

scripts/managers/portal_mode_manager.gd

@@ -18,6 +18,7 @@ var swap_timer: Timer
 var tile_refresh_timer: Timer
 var finish_spawned: bool = false
 var missions_required: int = 3
+var arena_setup_done: bool = false
 
 func initialize(p_main: Node, p_gridmap: Node):
 	main = p_main
@@ -54,30 +55,33 @@ func initialize(p_main: Node, p_gridmap: Node):
 func start_game_mode():
 	if not multiplayer.is_server(): return
 	
-	print("[PortalModeManager] Starting Portal Game Mode...")
+	if arena_setup_done and not doors.is_empty():
+		print("[PortalModeManager] Arena already setup, starting timers and refresh only.")
+	else:
+		print("[PortalModeManager] Starting Portal Game Mode with full setup...")
+		setup_arena_locally()
+		_randomize_connections()
 	
-	# 1. Setup Arena (GridMap walls & Doors)
-	setup_arena_locally()
+	# Start Timers
+	if swap_timer.is_stopped():
+		swap_timer.start()
+	if tile_refresh_timer.is_stopped():
+		tile_refresh_timer.start()
 	
-	# 2. Skip individual door spawn as it's now in setup_arena_locally
-	# _spawn_portal_doors()
-	
-	# 3. Initialize Connections
-	_randomize_connections()
-	
-	# 4. Start Timers
-	swap_timer.start()
-	tile_refresh_timer.start()
-	
-	# 5. Initial Tile Spawn
+	# Initial Tile Spawn
 	_refresh_tiles()
 
 func setup_arena_locally():
 	"""Sets up GridMap size and walls. Called on host and clients."""
+	if arena_setup_done:
+		print("[PortalModeManager] Arena already setup locally, skipping.")
+		return
+		
 	print("[PortalModeManager] Setting up arena locally...")
 	_setup_arena_size()
 	_setup_room_partitions()
 	_spawn_portal_doors()
+	arena_setup_done = true
 
 func _setup_arena_size():
 	if not gridmap: return