feat: implement initial lobby scene with main menu, server browser, and networking options.

scripts/ui/login_screen.gd

@@ -38,6 +38,7 @@ var is_loading: bool = false
 # Server Selection Controls
 var server_option: OptionButton
 var server_ip_input: LineEdit
+var lan_section: VBoxContainer # LAN-specific controls
 
 func _ready() -> void:
 	_connect_signals()
@@ -203,7 +204,7 @@ func _setup_server_config_ui() -> void:
 	
 	# Server Label
 	var label = Label.new()
-	label.text = "NAKAMA SERVER"
+	label.text = "CONNECTION MODE"
 	label.add_theme_color_override("font_color", Color(0.69, 0.529, 0.357, 1))
 	label.add_theme_font_size_override("font_size", 13)
 	server_section.add_child(label)
@@ -212,8 +213,9 @@ func _setup_server_config_ui() -> void:
 	server_option = OptionButton.new()
 	server_option.name = "ServerOption"
 	server_option.custom_minimum_size = Vector2(0, 44)
-	server_option.add_item("Localhost (Testing)")
-	server_option.add_item("Remote Server (Host IP)")
+	server_option.add_item("Nakama - Localhost (Testing)")
+	server_option.add_item("Nakama - Remote Server (Host IP)")
+	server_option.add_item("LAN Direct (No Server)")
 	
 	# Set initial state based on NakamaManager
 	if NakamaManager.nakama_host == "localhost":
@@ -224,17 +226,62 @@ func _setup_server_config_ui() -> void:
 	server_option.item_selected.connect(_on_server_option_selected)
 	server_section.add_child(server_option)
 	
-	# Server IP Input
+	# Nakama Server IP Input
 	server_ip_input = LineEdit.new()
 	server_ip_input.name = "ServerIPInput"
 	server_ip_input.custom_minimum_size = Vector2(0, 44)
-	server_ip_input.placeholder_text = "Enter Server IP Address..."
+	server_ip_input.placeholder_text = "Enter Nakama Server IP..."
 	server_ip_input.text = NakamaManager.nakama_host if NakamaManager.nakama_host != "localhost" else "127.0.0.1"
 	server_ip_input.visible = server_option.selected == 1
 	server_ip_input.text_submitted.connect(_on_server_ip_submitted)
 	server_ip_input.focus_exited.connect(func(): _on_server_ip_submitted(server_ip_input.text))
 	server_section.add_child(server_ip_input)
 	
+	# --- LAN Section ---
+	lan_section = VBoxContainer.new()
+	lan_section.name = "LANSection"
+	lan_section.add_theme_constant_override("separation", 8)
+	lan_section.visible = false
+	server_section.add_child(lan_section)
+	
+	var lan_info = Label.new()
+	lan_info.text = "Play over LAN without any server.\nFirewall may need to allow port 7777."
+	lan_info.add_theme_color_override("font_color", Color(0.7, 0.7, 0.7, 1))
+	lan_info.add_theme_font_size_override("font_size", 12)
+	lan_info.autowrap_mode = TextServer.AUTOWRAP_WORD
+	lan_section.add_child(lan_info)
+	
+	# Host LAN button
+	var lan_host_btn = Button.new()
+	lan_host_btn.name = "LANHostBtn"
+	lan_host_btn.text = "HOST LAN GAME"
+	lan_host_btn.custom_minimum_size = Vector2(0, 44)
+	lan_host_btn.pressed.connect(_on_lan_host_pressed)
+	lan_section.add_child(lan_host_btn)
+	
+	var lan_sep = Label.new()
+	lan_sep.text = "── or join a friend ──"
+	lan_sep.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	lan_sep.add_theme_color_override("font_color", Color(0.5, 0.5, 0.5, 1))
+	lan_sep.add_theme_font_size_override("font_size", 11)
+	lan_section.add_child(lan_sep)
+	
+	# LAN Host IP input
+	var lan_ip = LineEdit.new()
+	lan_ip.name = "LANIPInput"
+	lan_ip.custom_minimum_size = Vector2(0, 44)
+	lan_ip.placeholder_text = "Host IP (e.g. 192.168.1.10)"
+	lan_ip.text = "127.0.0.1"
+	lan_section.add_child(lan_ip)
+	
+	# Join LAN button
+	var lan_join_btn = Button.new()
+	lan_join_btn.name = "LANJoinBtn"
+	lan_join_btn.text = "JOIN LAN GAME"
+	lan_join_btn.custom_minimum_size = Vector2(0, 44)
+	lan_join_btn.pressed.connect(func(): _on_lan_join_pressed(lan_ip.text))
+	lan_section.add_child(lan_join_btn)
+	
 	# Add a separator after the section
 	var separator = HSeparator.new()
 	vbox.add_child(separator)
@@ -242,18 +289,55 @@ func _setup_server_config_ui() -> void:
 
 func _on_server_option_selected(index: int) -> void:
 	if index == 0:
-		# Localhost
+		# Nakama Localhost
 		server_ip_input.visible = false
+		if lan_section: lan_section.visible = false
 		NakamaManager.set_server("localhost")
-	else:
-		# Remote
+	elif index == 1:
+		# Nakama Remote
 		server_ip_input.visible = true
+		if lan_section: lan_section.visible = false
 		NakamaManager.set_server(server_ip_input.text)
+	else:
+		# LAN Direct
+		server_ip_input.visible = false
+		if lan_section: lan_section.visible = true
 
 func _on_server_ip_submitted(new_text: String) -> void:
-	if server_option.selected == 1:
+	if server_option and server_option.selected == 1:
 		NakamaManager.set_server(new_text.strip_edges())
 
+func _on_lan_host_pressed() -> void:
+	"""Host a LAN game without logging in to Nakama."""
+	var player_name = email_input.text.strip_edges()
+	if player_name.is_empty():
+		player_name = "Host"
+	LobbyManager.local_player_name = player_name
+	
+	var ok = await LobbyManager.create_room_lan()
+	if ok:
+		_go_to_lobby()
+	else:
+		_show_error("Failed to create LAN server. Check firewall for port 7777.")
+
+func _on_lan_join_pressed(host_ip: String) -> void:
+	"""Join a LAN game without logging in to Nakama."""
+	var ip = host_ip.strip_edges()
+	if ip.is_empty():
+		_show_error("Please enter the host's IP address.")
+		return
+	
+	var player_name = email_input.text.strip_edges()
+	if player_name.is_empty():
+		player_name = "Player"
+	LobbyManager.local_player_name = player_name
+	
+	var ok = LobbyManager.join_room_lan(ip)
+	if ok:
+		_go_to_lobby()
+	else:
+		_show_error("Failed to connect to %s. Is the host running?" % ip)
+
 # =============================================================================
 # Registration Handlers
 # =============================================================================