新增打印模板管理功能，包含免密接口和实时通知机制，支持桌面端打印模板的查询和列表展示。更新相关控制器、服务和视图，优化用户体验并增强系统的实时数据同步能力。

yy-admin-master/YY.Admin.Services/Service/Print/PrintDotSettings.cs

@@ -0,0 +1,46 @@
+namespace YY.Admin.Services.Service.Print;
+
+/// <summary>
+/// 运行时可修改的 PrintDot 连接设置（由设置页写入，PrintDotService 优先读取）。
+/// </summary>
+public class PrintDotSettings
+{
+    private static readonly string SettingsPath = System.IO.Path.Combine(
+        Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
+        "YY.Admin", "print-dot-settings.json");
+
+    public string WsUrl { get; set; } = "ws://127.0.0.1:1122/ws";
+    public string SelectedPrinter { get; set; } = string.Empty;
+
+    private static PrintDotSettings? _current;
+    public static PrintDotSettings? Current => _current;
+
+    public static PrintDotSettings Load()
+    {
+        try
+        {
+            if (System.IO.File.Exists(SettingsPath))
+            {
+                var json = System.IO.File.ReadAllText(SettingsPath);
+                _current = System.Text.Json.JsonSerializer.Deserialize<PrintDotSettings>(json) ?? new PrintDotSettings();
+                return _current;
+            }
+        }
+        catch { /* 读取失败使用默认值 */ }
+        _current = new PrintDotSettings();
+        return _current;
+    }
+
+    public void Save()
+    {
+        try
+        {
+            var dir = System.IO.Path.GetDirectoryName(SettingsPath)!;
+            System.IO.Directory.CreateDirectory(dir);
+            var json = System.Text.Json.JsonSerializer.Serialize(this, new System.Text.Json.JsonSerializerOptions { WriteIndented = true });
+            System.IO.File.WriteAllText(SettingsPath, json);
+            _current = this;
+        }
+        catch { /* 忽略保存失败 */ }
+    }
+}