feat: Implement core lobby system including UI, player management, and game mode settings.

scenes/lobby.gd

@@ -7,6 +7,7 @@ extends Control
 @onready var browse_rooms_btn = $MainMenuPanel/VBoxContainer/ButtonSection/BrowseRoomsBtn
 @onready var main_menu_profile_btn = $MainMenuPanel/VBoxContainer/ButtonSection/ProfileBtn
 @onready var lobby_settings_btn = $MainMenuPanel/VBoxContainer/ButtonSection/SettingsBtn
+@onready var quit_btn = $MainMenuPanel/VBoxContainer/ButtonSection/QuitBtn
 
 # UI References - Server Selection
 @onready var server_option = $MainMenuPanel/VBoxContainer/ServerSelectionSection/ServerOption
@@ -142,6 +143,8 @@ func _ready():
 		lobby_settings_btn.pressed.connect(_on_settings_pressed)
 	if leaderboard_btn:
 		leaderboard_btn.pressed.connect(_on_leaderboard_pressed)
+	if quit_btn:
+		quit_btn.pressed.connect(_on_quit_pressed)
 	
 	# Connect Server Selection signals
 	if server_option:
@@ -585,6 +588,10 @@ func _on_logout_pressed() -> void:
 	AuthManager.logout()
 	_go_to_login()
 
+func _on_quit_pressed() -> void:
+	print("[Lobby] Quitting game...")
+	get_tree().quit()
+
 func _on_settings_pressed():
 	var settings_menu = get_node_or_null("SettingsMenu")
 	if not settings_menu:

scenes/lobby.tscn

@@ -151,11 +151,17 @@ theme_override_font_sizes/font_size = 16
 text = "SETTINGS"
 
 [node name="ProfileBtn" type="Button" parent="MainMenuPanel/VBoxContainer/ButtonSection" unique_id=1640960506]
-custom_minimum_size = Vector2(0, 36)
 layout_mode = 2
+custom_minimum_size = Vector2(0, 36)
 theme_override_font_sizes/font_size = 14
 text = "PROFILE"
 
+[node name="QuitBtn" type="Button" parent="MainMenuPanel/VBoxContainer/ButtonSection" unique_id=123456780]
+layout_mode = 2
+custom_minimum_size = Vector2(0, 36)
+theme_override_font_sizes/font_size = 14
+text = "QUIT GAME"
+
 [node name="RoomListPanel" type="PanelContainer" parent="." unique_id=1782359692]
 visible = false
 layout_mode = 1

scenes/main.gd

@@ -1286,7 +1286,8 @@ func create_bot_with_state(bot_id: int, pos: Vector2i, p_score: int, p_goals: Ar
 
 func _on_host_disconnected():
 	"""Called when the host leaves. Returns clients to the main menu."""
-	print("[Main] Host disconnected. Match terminated. Returning to lobby...")
+	print("[Main] Host disconnected. Match terminated. Cleaning up and returning to lobby...")
+	LobbyManager.leave_room()
 	get_tree().change_scene_to_file("res://scenes/lobby.tscn")
 
 func _on_rematch_starting():
@@ -1575,6 +1576,14 @@ func sync_grid_item(x: int, y: int, z: int, item: int):
 			# OR Layer 1 is already a wall (4)
 			if f0 in [4, -1] or f1 == 4:
 				return
+				
+			# TEKTON DOORS: Prevent placing items on portal doors
+			if LobbyManager.is_game_mode(GameMode.Mode.TEKTON_DOORS):
+				var doors = get_tree().get_nodes_in_group("PortalDoors")
+				for door in doors:
+					var door_grid = enhanced_gridmap.local_to_map(enhanced_gridmap.to_local(door.global_position))
+					if door_grid.x == x and door_grid.z == z:
+						return
 
 		enhanced_gridmap.set_cell_item(Vector3i(x, y, z), item)
 		# Force visual update
@@ -1601,6 +1610,17 @@ func sync_grid_items_batch(data: Array):
 			if f0 in [4, -1] or f1 == 4:
 				continue
 				
+			# TEKTON DOORS: Prevent placing items on portal doors
+			if LobbyManager.is_game_mode(GameMode.Mode.TEKTON_DOORS) and y == 1:
+				var doors = get_tree().get_nodes_in_group("PortalDoors")
+				var on_door = false
+				for door in doors:
+					var door_grid = enhanced_gridmap.local_to_map(enhanced_gridmap.to_local(door.global_position))
+					if door_grid.x == x and door_grid.z == z:
+						on_door = true
+						break
+				if on_door: continue
+				
 		enhanced_gridmap.set_cell_item(Vector3i(x, y, z), item)
 		
 	# Force visual update ONCE after batch
@@ -2084,12 +2104,8 @@ func _on_back_to_menu_pressed():
 	"""Return to lobby/main menu and clean up game state."""
 	print("[Main] Returning to lobby...")
 	
-	# Proper ordered cleanup to avoid ghost players
-	GameStateManager.end_game()
-	LobbyManager.reset()
-	
-	# Properly disconnect from Nakama match
-	_cleanup_multiplayer()
+	# Proper ordered cleanup to avoid ghost players and desync
+	LobbyManager.leave_room()
 	
 	# Small delay to let cleanup settle
 	await get_tree().create_timer(0.2).timeout
@@ -2357,8 +2373,8 @@ func _on_settings_pressed():
 
 func _on_quit_match_pressed():
 	get_tree().paused = false # Ensure unpaused when returning to menu
-	# Properly disconnect from Nakama match
-	_cleanup_multiplayer()
+	# Properly disconnect from Nakama and clear lobby state to prevent desync
+	LobbyManager.leave_room()
 	# Return to lobby or main menu
 	get_tree().change_scene_to_file("res://scenes/lobby.tscn")
 

scenes/portal_door.tscn

@@ -50,6 +50,11 @@ properties/3/replication_mode = 2
 [node name="PortalDoor" type="StaticBody3D"]
 script = ExtResource("1_script")
 
+[node name="CollisionShape3D" type="CollisionShape3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.1, 0)
+shape = SubResource("BoxShape3D_trigger")
+
+
 [node name="MultiplayerSynchronizer" type="MultiplayerSynchronizer" parent="."]
 replication_config = SubResource("SceneReplicationConfig_portal")