fix: 调整square上的物品与场景的yz轴排序

- 增加通知板与用户交互，点击E，弹出通知消息
- 预留前端调用后端获取通知的接口，当不可用时，使用mock data

_Core/managers/NetworkManager.gd

@@ -38,15 +38,17 @@ signal request_completed(request_id: String, success: bool, data: Dictionary)
 #   message: String - 错误消息
 signal request_failed(request_id: String, error_type: String, message: String)
 
+# 公告列表接收信号
+signal notices_received(data: Array)
+
 # ============ 常量定义 ============
 
 # API基础URL - 所有请求的根地址
 # [Remote] 正式环境地址 (实际正式项目用此地址)
-# [Remote] 正式环境地址 (实际正式项目用此地址)
+# const API_BASE_URL = "https://whaletownend.xinghangee.icu"
-const API_BASE_URL = "https://whaletownend.xinghangee.icu"
 
 # [Local] 本地调试地址 (本地调试用此地址)
-# const API_BASE_URL = "http://localhost:3000"
+const API_BASE_URL = "http://localhost:3000"
 
 # 默认请求超时时间（秒）
 const DEFAULT_TIMEOUT = 30.0
@@ -119,6 +121,7 @@ var request_counter: int = 0                         # 请求计数器，用于
 # 初始化网络管理器
 # 在节点准备就绪时调用
 func _ready():
+	process_mode = Node.PROCESS_MODE_ALWAYS
 	print("NetworkManager 已初始化")
 
 # ============ 公共API接口 ============
@@ -441,6 +444,18 @@ func github_login(github_id: String, username: String, nickname: String, email:
 	
 	return post_request("/auth/github", data, callback)
 
+# TODO: 获取公告列表
+func request_notices():
+	# 发送 GET 请求到 /notices 接口
+	get_request("/notices", _on_notices_response)
+
+func _on_notices_response(success: bool, data: Dictionary, error_info: Dictionary):
+	if success and data.has("data"):
+		notices_received.emit(data["data"])
+	else:
+		# 失败或无数据时发送空数组
+		notices_received.emit([])
+
 # ============ 核心请求处理 ============
 
 # 发送请求的核心方法

assets/characters/npc_286_241.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://brko2ik6t6ib5"
+path="res://.godot/imported/npc_286_241.png-dfe6daef11d0f27f7902e69d6057828f.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/characters/npc_286_241.png"
+dest_files=["res://.godot/imported/npc_286_241.png-dfe6daef11d0f27f7902e69d6057828f.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

assets/materials/NoticeBoard.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://b4aildrnhbpl4"
+path="res://.godot/imported/NoticeBoard.png-038eefee12f116fb9502ed755594cede.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/materials/NoticeBoard.png"
+dest_files=["res://.godot/imported/NoticeBoard.png-038eefee12f116fb9502ed755594cede.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

assets/materials/WelcomeBoard.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://v7loa3smfkrd"
+path="res://.godot/imported/WelcomeBoard.png-bcff7f9bf968cb5d7630e2ad47f2fb42.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/materials/WelcomeBoard.png"
+dest_files=["res://.godot/imported/WelcomeBoard.png-bcff7f9bf968cb5d7630e2ad47f2fb42.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

scenes/characters/NPCController.gd

@@ -0,0 +1,29 @@
+extends CharacterBody2D
+
+signal interaction_happened(text)
+
+@export var npc_name: String = "NPC"
+@export var dialogue: String = "欢迎来到WhaleTown，我是镇长范鲸晶"
+
+func _ready():
+	$Sprite2D.texture = preload("res://assets/characters/npc_286_241.png")
+	$Sprite2D.hframes = 4
+	$Sprite2D.vframes = 4
+	
+	# Start Idle Animation
+	if has_node("AnimationPlayer"):
+		$AnimationPlayer.play("idle")
+	
+	# Ensure interaction layer
+	collision_layer = 3 # Layer 1 & 2 (Blocking)
+	collision_mask = 3
+
+func interact():
+	show_bubble(dialogue)
+	interaction_happened.emit(dialogue)
+	return null
+
+func show_bubble(text):
+	var bubble = preload("res://scenes/ui/ChatBubble.tscn").instantiate()
+	add_child(bubble)
+	bubble.set_text(text)

scenes/characters/NPCController.gd.uid

@@ -0,0 +1 @@
+uid://dy3uf1rlu4h1u

scenes/characters/PlayerController.gd

@@ -9,6 +9,7 @@ const MOVE_SPEED = 200.0
 # 节点引用
 @onready var animation_player: AnimationPlayer = $AnimationPlayer
 @onready var sprite: Sprite2D = $Sprite2D
+@onready var ray_cast: RayCast2D = $RayCast2D
 
 var last_direction := "down"
 
@@ -20,6 +21,11 @@ func _ready() -> void:
 	if animation_player.has_animation("idle"):
 		animation_player.play("idle")
 		
+	# Initialize RayCast
+	ray_cast.add_exception(self) # Ignore local player
+	ray_cast.enabled = true
+	ray_cast.target_position = Vector2(0, 60)
+	
 func _check_spawn_position() -> void:
 	var spawn_pos = SceneManager.get_next_scene_position()
 	if spawn_pos != null:
@@ -27,6 +33,14 @@ func _check_spawn_position() -> void:
 
 func _physics_process(delta: float) -> void:
 	_handle_movement(delta)
+	_handle_interaction()
+
+func _handle_interaction() -> void:
+	if Input.is_action_just_pressed("interact"):
+		if ray_cast.is_colliding():
+			var collider = ray_cast.get_collider()
+			if collider and collider.has_method("interact"):
+				collider.interact()
 
 func _handle_movement(_delta: float) -> void:
 	# 获取移动向量 (参考 docs/02-开发规范/输入映射配置.md)
@@ -59,13 +73,17 @@ func _update_animation_state(direction: Vector2) -> void:
 	if abs(direction.x) > abs(direction.y):
 		if direction.x > 0:
 			last_direction = "right"
+			ray_cast.target_position = Vector2(60, 0)
 		else:
 			last_direction = "left"
+			ray_cast.target_position = Vector2(-60, 0)
 	else:
 		if direction.y > 0:
 			last_direction = "down"
+			ray_cast.target_position = Vector2(0, 60)
 		else:
 			last_direction = "up"
+			ray_cast.target_position = Vector2(0, -60)
 	
 	animation_player.play("walk_" + last_direction)
 

scenes/characters/npc.tscn

@@ -0,0 +1,64 @@
+[gd_scene load_steps=7 format=3 uid="uid://npc2282a2new"]
+
+[ext_resource type="Texture2D" uid="uid://brko2ik6t6ib5" path="res://assets/characters/npc_286_241.png" id="1_2r34a"]
+[ext_resource type="Script" uid="uid://dy3uf1rlu4h1u" path="res://scenes/characters/NPCController.gd" id="1_script"]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_npc"]
+size = Vector2(48, 24)
+
+[sub_resource type="Animation" id="Animation_2r34a"]
+length = 0.001
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath("Sprite2D:frame")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 1,
+"values": [0]
+}
+
+[sub_resource type="Animation" id="Animation_idle"]
+resource_name = "idle"
+length = 1.2
+loop_mode = 1
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath("Sprite2D:frame")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0.0333333, 0.26666665, 0.4666667, 0.8, 1),
+"transitions": PackedFloat32Array(1, 1, 1, 1, 1),
+"update": 1,
+"values": [2, 1, 0, 4, 5]
+}
+
+[sub_resource type="AnimationLibrary" id="AnimationLibrary_npc"]
+_data = {
+&"RESET": SubResource("Animation_2r34a"),
+&"idle": SubResource("Animation_idle")
+}
+
+[node name="NPC" type="CharacterBody2D"]
+position = Vector2(-8, 0)
+script = ExtResource("1_script")
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+texture = ExtResource("1_2r34a")
+hframes = 4
+vframes = 4
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+light_mask = 5
+visibility_layer = 5
+shape = SubResource("RectangleShape2D_npc")
+
+[node name="AnimationPlayer" type="AnimationPlayer" parent="."]
+libraries = {
+&"": SubResource("AnimationLibrary_npc")
+}

scenes/characters/player.tscn

@@ -175,3 +175,5 @@ libraries = {
 
 [node name="Camera2D" type="Camera2D" parent="."]
 zoom = Vector2(2, 2)
+
+[node name="RayCast2D" type="RayCast2D" parent="."]

scenes/prefabs/items/NoticeBoard.gd

@@ -0,0 +1,13 @@
+extends StaticBody2D
+
+func interact():
+	print("Interacted with Notice Board")
+	
+	# Check if dialog already exists
+	if get_tree().root.has_node("NoticeDialog"):
+		return
+		
+	var dialog = preload("res://scenes/ui/notice_dialog.tscn").instantiate()
+	dialog.name = "NoticeDialog"
+	get_tree().root.add_child(dialog)
+	return null # No bubble text needed

scenes/prefabs/items/NoticeBoard.gd.uid

@@ -0,0 +1 @@
+uid://pnlgf420wktn

scenes/prefabs/items/WelcomeBoard.gd

@@ -0,0 +1,13 @@
+extends StaticBody2D
+
+func interact():
+	# Prevent multiple dialogs
+	if get_tree().root.has_node("WelcomeDialog"):
+		return null
+		
+	# Spawn the Welcome Dialog
+	var dialog = preload("res://scenes/ui/welcome_dialog.tscn").instantiate()
+	dialog.name = "WelcomeDialog"
+	# Add to the Scene Root (World) or CanvasLayer if it has one
+	get_tree().root.add_child(dialog)
+	return null # Return null prevents Player from showing a bubble

scenes/prefabs/items/WelcomeBoard.gd.uid

@@ -0,0 +1 @@
+uid://d2od22agputjt

scenes/prefabs/items/notice_board.tscn

@@ -0,0 +1,20 @@
+[gd_scene load_steps=4 format=3 uid="uid://rdmrm7j4iokr"]
+
+[ext_resource type="Script" uid="uid://pnlgf420wktn" path="res://scenes/prefabs/items/NoticeBoard.gd" id="1_script"]
+[ext_resource type="Texture2D" uid="uid://b4aildrnhbpl4" path="res://assets/materials/NoticeBoard.png" id="2_sprite"]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_nb"]
+size = Vector2(160, 53.333332)
+
+[node name="NoticeBoard" type="StaticBody2D"]
+scale = Vector2(0.6, 0.6)
+script = ExtResource("1_script")
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+position = Vector2(0, -16)
+scale = Vector2(0.5, 0.5)
+texture = ExtResource("2_sprite")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+position = Vector2(0, 13.333335)
+shape = SubResource("RectangleShape2D_nb")

scenes/prefabs/items/welcome_board.tscn

@@ -0,0 +1,19 @@
+[gd_scene load_steps=4 format=3 uid="uid://c7k8yay002w4"]
+
+[ext_resource type="Script" uid="uid://d2od22agputjt" path="res://scenes/prefabs/items/WelcomeBoard.gd" id="1_script"]
+[ext_resource type="Texture2D" uid="uid://v7loa3smfkrd" path="res://assets/materials/WelcomeBoard.png" id="2_sprite"]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_board"]
+size = Vector2(112, 26.5)
+
+[node name="WelcomeBoard" type="StaticBody2D"]
+collision_layer = 3
+script = ExtResource("1_script")
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+scale = Vector2(0.25, 0.25)
+texture = ExtResource("2_sprite")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+position = Vector2(0, 18.75)
+shape = SubResource("RectangleShape2D_board")

scenes/ui/AuthScene.tscn

@@ -2,7 +2,7 @@
 
 [ext_resource type="Texture2D" uid="uid://bx17oy8lvaca4" path="res://assets/ui/auth/bg_auth_scene.png" id="1_background"]
 [ext_resource type="Texture2D" uid="uid://de4q4s1gxivtf" path="res://assets/ui/auth/login_frame_smart_transparent.png" id="2_frame"]
-[ext_resource type="Script" path="res://scenes/ui/AuthScene.gd" id="3_script"]
+[ext_resource type="Script" uid="uid://b514h2wuido0h" path="res://scenes/ui/AuthScene.gd" id="3_script"]
 
 [sub_resource type="StyleBoxEmpty" id="StyleBoxEmpty_1"]
 

scenes/ui/ChatBubble.gd

@@ -0,0 +1,9 @@
+extends Control
+
+@onready var label = $PanelContainer/Label
+
+func set_text(text):
+	label.text = text
+	# Destroy after 5 seconds
+	await get_tree().create_timer(5.0).timeout
+	queue_free()

scenes/ui/ChatBubble.gd.uid

@@ -0,0 +1 @@
+uid://b4aorojcbwkmb

scenes/ui/ChatBubble.tscn

@@ -0,0 +1,42 @@
+[gd_scene load_steps=3 format=3]
+
+[ext_resource type="Script" uid="uid://b4aorojcbwkmb" path="res://scenes/ui/ChatBubble.gd" id="1_script"]
+
+[sub_resource type="StyleBoxFlat" id="StyleBoxFlat_bubble_modern"]
+bg_color = Color(1, 1, 1, 0.9)
+corner_radius_top_left = 5
+corner_radius_top_right = 5
+corner_radius_bottom_right = 5
+corner_radius_bottom_left = 5
+shadow_color = Color(0, 0, 0, 0.2)
+shadow_size = 2
+
+[node name="ChatBubble" type="Control"]
+layout_mode = 3
+anchors_preset = 0
+script = ExtResource("1_script")
+
+[node name="PanelContainer" type="PanelContainer" parent="."]
+layout_mode = 1
+anchors_preset = 7
+anchor_left = 0.5
+anchor_top = 1.0
+anchor_right = 0.5
+anchor_bottom = 1.0
+offset_left = -75.0
+offset_top = -60.0
+offset_right = 75.0
+offset_bottom = -20.0
+grow_horizontal = 2
+grow_vertical = 0
+theme_override_styles/panel = SubResource("StyleBoxFlat_bubble_modern")
+
+[node name="Label" type="Label" parent="PanelContainer"]
+layout_mode = 2
+theme_override_colors/font_color = Color(0.1, 0.1, 0.1, 1)
+theme_override_font_sizes/font_size = 8
+text = "..."
+horizontal_alignment = 1
+vertical_alignment = 1
+autowrap_mode = 3
+custom_minimum_size = Vector2(150, 0)

scenes/ui/NoticeDialog.gd

@@ -0,0 +1,156 @@
+extends CanvasLayer
+
+@onready var content_label = $CenterContainer/PanelContainer/VBoxContainer/ContentContainer/TextPanel/ContentLabel
+@onready var prev_btn = $CenterContainer/PanelContainer/VBoxContainer/Footer/PrevButton
+@onready var next_btn = $CenterContainer/PanelContainer/VBoxContainer/Footer/NextButton
+@onready var dots_container = $CenterContainer/PanelContainer/VBoxContainer/Footer/DotsContainer
+@onready var content_container = $CenterContainer/PanelContainer/VBoxContainer/ContentContainer
+
+# Mock Data
+var pages = [
+	{
+		"text": "欢迎来到 [color=#3399ff]Datawhale Town[/color]!\n\n这里是开源学习者的家园。在这里，我们一同探索知识，分享成长。\n\n[center]🐋[/center]",
+		# 使用社区图片作为封面
+		"image_path": "res://assets/sprites/environment/community_512_512.png",
+		"image_color": Color(0.9, 0.9, 0.9) # 保留作为后备选项
+	},
+	{
+		"text": "最新活动：\n\n- 镇长刚刚搬进来了，就在喷泉左边。\n- 欢迎板已经设立，查看最新动态。\n- 玩家名字现在显示在头顶了！",
+		# 使用喷泉图片对应"喷泉左边"的描述
+		"image_path": "res://assets/sprites/environment/fountain_256_192.png", 
+		"image_color": Color(0.8, 0.9, 0.8)
+	},
+	{
+		"text": "操作提示：\n\n- 按 [color=#ffaa00]F[/color] 键可以与物体互动。\n- 在下方输入框输入文字并在气泡中显示。\n- 点击右下角按钮发送聊天。",
+		# 使用公告板图片对应"操作提示"
+		"image_path": "res://assets/sprites/environment/board.png",
+		"image_color": Color(0.9, 0.8, 0.8)
+	}
+]
+
+var current_page = 0
+var tween: Tween
+var mock_pages = []
+
+func _ready():
+	# Pause the game
+	get_tree().paused = true
+	
+	$CenterContainer/PanelContainer/VBoxContainer/Header/RightContainer/CloseButton.pressed.connect(_on_close_pressed)
+	prev_btn.pressed.connect(_on_prev_pressed)
+	next_btn.pressed.connect(_on_next_pressed)
+	
+	# Network Integration - Use direct callback for better error handling
+	# Short timeout (2.0s) so mock data appears quickly if server is down
+	NetworkManager.get_request("/notices", _on_notices_response, 2.0)
+	
+	# Initial Setup (with generic "Loading" state)
+	mock_pages = pages.duplicate(true)
+	pages = [{"text": "[center]Loading notices...[/center]", "image_color": Color(0.9, 0.9, 0.9)}]
+	_setup_dots()
+	_update_ui(false) 
+
+func _on_notices_response(success: bool, data: Dictionary, _error_info: Dictionary):
+	var new_pages = []
+	if success and data.has("data") and data["data"] is Array:
+		new_pages = data["data"]
+	
+	if new_pages.is_empty():
+		pages = mock_pages
+	else:
+		pages = new_pages
+		# Handle color strings from JSON if necessary
+		for p in pages:
+			if p.has("image_color") and p["image_color"] is String:
+				p["image_color"] = Color(p["image_color"])
+	
+	current_page = 0
+	_setup_dots()
+	_update_ui(true)
+
+
+func _setup_dots():
+	for child in dots_container.get_children():
+		child.queue_free()
+	
+	for i in range(pages.size()):
+		var dot = ColorRect.new()
+		dot.custom_minimum_size = Vector2(10, 10) # Base size
+		dots_container.add_child(dot)
+
+func _update_ui(animate: bool = true):
+	if pages.is_empty():
+		return
+		
+	# Update Buttons
+	prev_btn.disabled = (current_page == 0)
+	next_btn.disabled = (current_page == pages.size() - 1)
+	
+	# Update Dots Logic
+	var dots = dots_container.get_children()
+	for i in range(dots.size()):
+		if i == current_page:
+			dots[i].color = Color(0.2, 0.2, 0.2, 1) # Dark Active
+			dots[i].custom_minimum_size = Vector2(12, 12) # Active Slightly Larger
+		else:
+			dots[i].color = Color(0.8, 0.8, 0.8, 1) # Light Inactive
+			dots[i].custom_minimum_size = Vector2(10, 10)
+	
+	# Update Content
+	if animate:
+		_animate_content_change()
+	else:
+		_set_content_immediate()
+
+@onready var image_rect = $CenterContainer/PanelContainer/VBoxContainer/ContentContainer/ImagePanel/ImageRect
+@onready var image_label = $CenterContainer/PanelContainer/VBoxContainer/ContentContainer/ImagePanel/ImageLabel
+
+func _set_content_immediate():
+	var page = pages[current_page]
+	content_label.text = page.get("text", "")
+	
+	if page.has("image_path") and page["image_path"] != "":
+		var path = page["image_path"]
+		if ResourceLoader.exists(path):
+			image_rect.texture = load(path)
+			image_label.visible = false
+		else:
+			image_rect.texture = null
+			image_label.visible = true
+			image_label.text = "Image Not Found"
+	else:
+		image_rect.texture = null
+		image_label.visible = true
+		image_label.text = "No Image"
+
+
+	
+func _animate_content_change():
+	if tween and tween.is_valid():
+		tween.kill()
+	
+	tween = create_tween()
+	
+	# Fade Out
+	tween.tween_property(content_container, "modulate:a", 0.0, 0.15)
+	
+	# Callback to change text
+	tween.tween_callback(self._set_content_immediate)
+	
+	# Fade In
+	tween.tween_property(content_container, "modulate:a", 1.0, 0.15)
+
+func _on_prev_pressed():
+	if current_page > 0:
+		current_page -= 1
+		_update_ui()
+
+func _on_next_pressed():
+	if current_page < pages.size() - 1:
+		current_page += 1
+		_update_ui()
+
+func _on_close_pressed():
+	# Unpause the game
+	get_tree().paused = false
+	queue_free()

scenes/ui/NoticeDialog.gd.uid

@@ -0,0 +1 @@
+uid://cxi5rchnmk07p

scenes/ui/WelcomeDialog.gd

@@ -0,0 +1,20 @@
+extends CanvasLayer
+
+func _ready():
+	# Connect close button (X)
+	var header_close = find_child("CloseButton", true, false)
+	if header_close:
+		header_close.pressed.connect(_on_close_pressed)
+		
+	# Connect Start button
+	var start_btn = find_child("StartButton", true, false)
+	if start_btn:
+		start_btn.pressed.connect(_on_close_pressed)
+
+func _on_close_pressed():
+	queue_free()
+
+func _input(event):
+	# Allow ESC to close
+	if event.is_action_pressed("ui_cancel"):
+		queue_free()

scenes/ui/WelcomeDialog.gd.uid

@@ -0,0 +1 @@
+uid://cu6x4dxhsylw2

scenes/ui/notice_dialog.tscn

@@ -0,0 +1,132 @@
+[gd_scene load_steps=3 format=3 uid="uid://rdmro1jxs6ga"]
+
+[ext_resource type="Script" uid="uid://cxi5rchnmk07p" path="res://scenes/ui/NoticeDialog.gd" id="1_script"]
+
+[sub_resource type="StyleBoxFlat" id="StyleBoxFlat_rounded"]
+bg_color = Color(0.95, 0.95, 0.95, 1)
+corner_radius_top_left = 16
+corner_radius_top_right = 16
+corner_radius_bottom_right = 16
+corner_radius_bottom_left = 16
+shadow_color = Color(0, 0, 0, 0.2)
+shadow_size = 8
+
+[node name="NoticeDialog" type="CanvasLayer"]
+process_mode = 3
+script = ExtResource("1_script")
+
+[node name="Dimmer" type="ColorRect" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0, 0, 0, 0.5)
+
+[node name="CenterContainer" type="CenterContainer" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="PanelContainer" type="PanelContainer" parent="CenterContainer"]
+custom_minimum_size = Vector2(480, 420)
+layout_mode = 2
+theme_override_styles/panel = SubResource("StyleBoxFlat_rounded")
+
+[node name="VBoxContainer" type="VBoxContainer" parent="CenterContainer/PanelContainer"]
+layout_mode = 2
+theme_override_constants/separation = 12
+
+[node name="HeaderSpacer" type="Control" parent="CenterContainer/PanelContainer/VBoxContainer"]
+custom_minimum_size = Vector2(0, 4)
+layout_mode = 2
+
+[node name="Header" type="HBoxContainer" parent="CenterContainer/PanelContainer/VBoxContainer"]
+layout_mode = 2
+
+[node name="LeftSpacer" type="Control" parent="CenterContainer/PanelContainer/VBoxContainer/Header"]
+layout_mode = 2
+size_flags_horizontal = 3
+
+[node name="Title" type="Label" parent="CenterContainer/PanelContainer/VBoxContainer/Header"]
+layout_mode = 2
+theme_override_colors/font_color = Color(0.2, 0.2, 0.2, 1)
+theme_override_font_sizes/font_size = 22
+text = "公告板"
+horizontal_alignment = 1
+
+[node name="RightContainer" type="HBoxContainer" parent="CenterContainer/PanelContainer/VBoxContainer/Header"]
+layout_mode = 2
+size_flags_horizontal = 3
+alignment = 2
+
+[node name="CloseButton" type="Button" parent="CenterContainer/PanelContainer/VBoxContainer/Header/RightContainer"]
+custom_minimum_size = Vector2(32, 32)
+layout_mode = 2
+text = "X"
+flat = true
+
+[node name="RightMargin" type="Control" parent="CenterContainer/PanelContainer/VBoxContainer/Header/RightContainer"]
+custom_minimum_size = Vector2(8, 0)
+layout_mode = 2
+
+[node name="ContentContainer" type="VBoxContainer" parent="CenterContainer/PanelContainer/VBoxContainer"]
+layout_mode = 2
+size_flags_vertical = 3
+theme_override_constants/separation = 10
+
+[node name="ImagePanel" type="PanelContainer" parent="CenterContainer/PanelContainer/VBoxContainer/ContentContainer"]
+custom_minimum_size = Vector2(0, 200)
+layout_mode = 2
+
+[node name="ImageRect" type="TextureRect" parent="CenterContainer/PanelContainer/VBoxContainer/ContentContainer/ImagePanel"]
+layout_mode = 2
+expand_mode = 1
+stretch_mode = 5
+
+[node name="ImageLabel" type="Label" parent="CenterContainer/PanelContainer/VBoxContainer/ContentContainer/ImagePanel"]
+layout_mode = 2
+theme_override_colors/font_color = Color(0.6, 0.6, 0.6, 1)
+text = "Image Placeholder"
+horizontal_alignment = 1
+vertical_alignment = 1
+
+[node name="TextPanel" type="MarginContainer" parent="CenterContainer/PanelContainer/VBoxContainer/ContentContainer"]
+layout_mode = 2
+size_flags_vertical = 3
+theme_override_constants/margin_left = 16
+theme_override_constants/margin_right = 16
+
+[node name="ContentLabel" type="RichTextLabel" parent="CenterContainer/PanelContainer/VBoxContainer/ContentContainer/TextPanel"]
+layout_mode = 2
+theme_override_colors/default_color = Color(0.3, 0.3, 0.3, 1)
+theme_override_font_sizes/normal_font_size = 16
+bbcode_enabled = true
+text = "Announcement Content..."
+
+[node name="Footer" type="HBoxContainer" parent="CenterContainer/PanelContainer/VBoxContainer"]
+custom_minimum_size = Vector2(0, 48)
+layout_mode = 2
+theme_override_constants/separation = 20
+alignment = 1
+
+[node name="PrevButton" type="Button" parent="CenterContainer/PanelContainer/VBoxContainer/Footer"]
+custom_minimum_size = Vector2(40, 40)
+layout_mode = 2
+text = "<"
+
+[node name="DotsContainer" type="HBoxContainer" parent="CenterContainer/PanelContainer/VBoxContainer/Footer"]
+layout_mode = 2
+theme_override_constants/separation = 8
+alignment = 1
+
+[node name="NextButton" type="Button" parent="CenterContainer/PanelContainer/VBoxContainer/Footer"]
+custom_minimum_size = Vector2(40, 40)
+layout_mode = 2
+text = ">"
+
+[node name="BottomSpacer" type="Control" parent="CenterContainer/PanelContainer/VBoxContainer"]
+custom_minimum_size = Vector2(0, 4)
+layout_mode = 2

scenes/ui/welcome_dialog.tscn

@@ -0,0 +1,117 @@
+[gd_scene load_steps=5 format=3 uid="uid://d8mam0n1a3b5"]
+
+[ext_resource type="Script" uid="uid://cu6x4dxhsylw2" path="res://scenes/ui/WelcomeDialog.gd" id="1_vs5b1"]
+[ext_resource type="Texture2D" uid="uid://v7loa3smfkrd" path="res://assets/materials/WelcomeBoard.png" id="2_dy5hw"]
+
+[sub_resource type="StyleBoxFlat" id="StyleBoxFlat_card"]
+bg_color = Color(1, 1, 1, 1)
+corner_radius_top_left = 10
+corner_radius_top_right = 10
+corner_radius_bottom_right = 10
+corner_radius_bottom_left = 10
+shadow_color = Color(0, 0, 0, 0.2)
+shadow_size = 10
+
+[sub_resource type="StyleBoxFlat" id="StyleBoxFlat_btn_rounded"]
+bg_color = Color(0.95, 0.95, 0.95, 1)
+border_width_left = 1
+border_width_top = 1
+border_width_right = 1
+border_width_bottom = 1
+corner_radius_top_left = 20
+corner_radius_top_right = 20
+corner_radius_bottom_right = 20
+corner_radius_bottom_left = 20
+
+[node name="WelcomeDialog" type="CanvasLayer"]
+script = ExtResource("1_vs5b1")
+
+[node name="ColorRect" type="ColorRect" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0, 0, 0, 0.4)
+
+[node name="CenterContainer" type="CenterContainer" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="PanelContainer" type="PanelContainer" parent="CenterContainer"]
+custom_minimum_size = Vector2(400, 350)
+layout_mode = 2
+theme_override_styles/panel = SubResource("StyleBoxFlat_card")
+
+[node name="VBoxContainer" type="VBoxContainer" parent="CenterContainer/PanelContainer"]
+layout_mode = 2
+theme_override_constants/separation = 10
+
+[node name="Header" type="HBoxContainer" parent="CenterContainer/PanelContainer/VBoxContainer"]
+layout_mode = 2
+alignment = 1
+
+[node name="Spacer" type="Control" parent="CenterContainer/PanelContainer/VBoxContainer/Header"]
+layout_mode = 2
+size_flags_horizontal = 3
+
+[node name="Title" type="Label" parent="CenterContainer/PanelContainer/VBoxContainer/Header"]
+layout_mode = 2
+theme_override_colors/font_color = Color(0, 0, 0, 1)
+theme_override_font_sizes/font_size = 18
+text = "欢迎来到 Datawhale Town!"
+
+[node name="Spacer2" type="Control" parent="CenterContainer/PanelContainer/VBoxContainer/Header"]
+layout_mode = 2
+size_flags_horizontal = 3
+
+[node name="CloseButton" type="Button" parent="CenterContainer/PanelContainer/VBoxContainer/Header"]
+custom_minimum_size = Vector2(30, 30)
+layout_mode = 2
+text = "X"
+flat = true
+
+[node name="HSeparator" type="HSeparator" parent="CenterContainer/PanelContainer/VBoxContainer"]
+layout_mode = 2
+
+[node name="LogoContainer" type="CenterContainer" parent="CenterContainer/PanelContainer/VBoxContainer"]
+layout_mode = 2
+
+[node name="TextureRect" type="TextureRect" parent="CenterContainer/PanelContainer/VBoxContainer/LogoContainer"]
+custom_minimum_size = Vector2(300, 100)
+layout_mode = 2
+texture = ExtResource("2_dy5hw")
+expand_mode = 1
+stretch_mode = 5
+
+[node name="BodyText" type="Label" parent="CenterContainer/PanelContainer/VBoxContainer"]
+layout_mode = 2
+theme_override_colors/font_color = Color(0.3, 0.3, 0.3, 1)
+theme_override_font_sizes/font_size = 14
+text = "连接·共生·见证
+Datawhale Town —— 学习者的赛博家园与精神坐标。
+✨ 实时广场：看大家都在学什么。
+🏠 个人空间：展示你的学习笔记与作品。
+🤝 开源营地：更有氛围的组队学习体验。"
+horizontal_alignment = 1
+autowrap_mode = 3
+
+[node name="Spacer3" type="Control" parent="CenterContainer/PanelContainer/VBoxContainer"]
+layout_mode = 2
+size_flags_vertical = 3
+
+[node name="ActionContainer" type="CenterContainer" parent="CenterContainer/PanelContainer/VBoxContainer"]
+layout_mode = 2
+
+[node name="StartButton" type="Button" parent="CenterContainer/PanelContainer/VBoxContainer/ActionContainer"]
+custom_minimum_size = Vector2(150, 40)
+layout_mode = 2
+theme_override_colors/font_color = Color(0, 0, 0, 1)
+theme_override_styles/normal = SubResource("StyleBoxFlat_btn_rounded")
+text = "开始探索"
+
+[node name="MarginContainer" type="MarginContainer" parent="CenterContainer/PanelContainer/VBoxContainer"]
+layout_mode = 2