feat: 重构项目结构，添加 WPF 应用

- 将核心功能提取到 WCTDataMiner.Core 类库
- 添加 WCTDataMiner.Wpf 桌面应用
- 支持数据解析、导出、统计等功能

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/WCTDataMiner.Wpf/ViewModels/QfodChartViewModel.cs

@@ -0,0 +1,49 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using LiveChartsCore;
+using LiveChartsCore.SkiaSharpView;
+
+namespace WCTDataMiner.Wpf.ViewModels;
+
+/// <summary>
+/// Qfod 折线图 ViewModel
+/// </summary>
+public partial class QfodChartViewModel : ObservableObject
+{
+    [ObservableProperty]
+    private int _scenarioId;
+
+    [ObservableProperty]
+    private ISeries[] _series;
+
+    [ObservableProperty]
+    private Axis[] _xAxes;
+
+    [ObservableProperty]
+    private Axis[] _yAxes;
+
+    public QfodChartViewModel()
+    {
+        // 初始化图表配置
+        Series = Array.Empty<ISeries>();
+        XAxes = new Axis[] { new Axis { Name = "Coil Index" } };
+        YAxes = new Axis[] { new Axis { Name = "Q Value" } };
+    }
+
+    public async Task LoadDataAsync()
+    {
+        // TODO: 从数据库加载 Qfod 数据并构建图表
+        Series = new ISeries[]
+        {
+            new LineSeries<double>
+            {
+                Name = "DeltaQ",
+                Values = new double[] { 25, 30, 28 }
+            },
+            new LineSeries<double>
+            {
+                Name = "CurrentQ",
+                Values = new double[] { 45.5, 50.2, 48.8 }
+            }
+        };
+    }
+}