chore: fix warning

src/MaaWpfGui/Helper/ConfigConverter.cs

@@ -60,8 +60,9 @@ public class ConfigConverter
         {
             ret &= ConvertTaskQueue();
         }
-        else if (configurations != null) // 保证 configurations 可用
+        else if (configurations != null)
         {
+            // 保证 configurations 可用
             if (parsedOld["Configurations"] is JObject oldConfigurations)
             {
                 // 删除多余配置

src/MaaWpfGui/Models/Copilot/CopilotModel.cs

@@ -117,6 +117,7 @@ public class CopilotModel : CopilotBase
             return string.Empty;
         }
         string[] moduleName = [string.Empty, "χ", "γ", "α", "Δ"];
+
         // var moduleLevel = req.ModuleLevel > 0 ? $" [Lv.{req.ModuleLevel}]" : string.Empty;
 
         // 模组编号 -1: 不切换模组 / 无要求, 0: 不使用模组, 1: 模组χ, 2: 模组γ, 3: 模组α, 4: 模组Δ

src/MaaWpfGui/ViewModels/UI/SettingsViewModel.cs

@@ -501,12 +501,16 @@ public class SettingsViewModel : Screen
 
     public ObservableCollection<CombinedData> ConfigurationList { get; set; } = [];
 
-    private string? _currentConfiguration = ConfigurationHelper.GetCurrentConfiguration();
+    private string _currentConfiguration = ConfigurationHelper.GetCurrentConfiguration();
 
     public string? CurrentConfiguration
     {
         get => _currentConfiguration;
         set {
+            if (value == null)
+            {
+                return;
+            }
             bool ret = ConfigurationHelper.SwitchConfiguration(value);
             ret &= ConfigFactory.SwitchConfig(value);