feat(app): 初始化本地通知桌面应用

搭建 .NET 8 WPF 应用骨架，加入系统托盘、单实例启动与主控制面板。
实现本地 HTTP /notify 消息接入、频道严格匹配、免打扰、熔断限流与历史持久化。
补充弹窗样式配置、队列/推挤/替换展示、溢出处理、应用图标和项目文档。

Initial-Commit: true

AssemblyInfo.cs

@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly:ThemeInfo(
+    ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
+                                                //(used if a resource is not found in the page,
+                                                // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly   //where the generic resource dictionary is located
+                                                //(used if a resource is not found in the page,
+                                                // app, or any theme specific resource dictionaries)
+)]