fix: 修复交互与通知板问题

- 修复Z轴逻辑调整精灵与物品的排序
- 渲染前强制 content_container.modulate.a = 1.0，避免内容区被透明度状态卡住导致看起来空白

scenes/ui/NoticeDialog.gd

@@ -43,16 +43,13 @@ func _ready():
 	$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)
+
+	# Local-only setup: use built-in pages directly, no network dependency.
 	mock_pages = pages.duplicate(true)
-	pages = [{"text": "[center]Loading notices...[/center]", "image_color": Color(0.9, 0.9, 0.9)}]
+	current_page = 0
+	content_container.modulate.a = 1.0
 	_setup_dots()
-	_update_ui(false) 
+	_update_ui(false)
 
 func _exit_tree():
 	_restore_chat_ui_mouse_input()
@@ -73,7 +70,8 @@ func _on_notices_response(success: bool, data: Dictionary, _error_info: Dictiona
 	
 	current_page = 0
 	_setup_dots()
-	_update_ui(true)
+	content_container.modulate.a = 1.0
+	_update_ui(false)
 
 
 func _setup_dots():