feat(config): bump schema v20→v21 with ScreenshotMode field

Adds persisted ScreenshotMode flag to Configuration (was previously a
ChatLogWindow-instance field in v1.5.6). Schema bump is additive — no
breaking change. SelfTest renamed V20→V21 with matching version-gate
flip and new touch-test for the new field.

Pre-flight for v1.7.1 PayloadHandler-Pipeline Resurrection.

HellionChat/Configuration.cs

@@ -35,7 +35,7 @@ public class ConfigKeyBind
 [Serializable]
 public class Configuration : IPluginConfiguration
 {
-    internal const int LatestVersion = 20;
+    internal const int LatestVersion = 21;
 
     public int Version { get; set; } = LatestVersion;
 
@@ -172,6 +172,7 @@ public class Configuration : IPluginConfiguration
     public HashSet<Guid> InactivityHideExtraChatChannels = [];
     public bool ShowHideButton = true;
     public bool NativeItemTooltips = true;
+    public bool ScreenshotMode;
     public bool PrettierTimestamps = true;
     public bool MoreCompactPretty;
     public bool HideSameTimestamps = true;
@@ -285,6 +286,7 @@ public class Configuration : IPluginConfiguration
         InactivityHideExtraChatChannels = other.InactivityHideExtraChatChannels.ToHashSet();
         ShowHideButton = other.ShowHideButton;
         NativeItemTooltips = other.NativeItemTooltips;
+        ScreenshotMode = other.ScreenshotMode;
         PrettierTimestamps = other.PrettierTimestamps;
         MoreCompactPretty = other.MoreCompactPretty;
         HideSameTimestamps = other.HideSameTimestamps;

HellionChat/Plugin.cs

@@ -214,7 +214,7 @@ public sealed class Plugin : IAsyncDalamudPlugin
                     + "Please install v1.4.2 first to migrate the configuration, then upgrade to v1.4.10."
             );
         }
-        Config.Version = 20;
+        Config.Version = 21;
 
         // Unpinned TempTabs are session-only and dropped on every load. Pinned
         // TempTabs survive reload — Jin's tester feedback (v1.4.7).
@@ -347,7 +347,7 @@ public sealed class Plugin : IAsyncDalamudPlugin
                 new SelfTests.SettingsWindowOpenStep(this),
                 new SelfTests.OnOpenMainUiRoutesMainWindowStep(this),
                 new SelfTests.TypingIpcStateStep(this),
-                new SelfTests.ConfigMigrationV20Step(this),
+                new SelfTests.ConfigMigrationV21Step(this),
                 new SelfTests.HoverSheenAllocStep(this),
                 new SelfTests.HonorificHeaderRenderStep(this),
                 new SelfTests.PerformanceBaselineStep(this),

HellionChat/SelfTests/ConfigMigrationV21Step.cs

@@ -3,27 +3,27 @@ using Dalamud.Plugin.SelfTest;
 
 namespace HellionChat.SelfTests;
 
-// Pins the post-migration shape of the v20 config. The plugin schema
-// gate stamps Config.Version = 20 right after load, so by the time
+// Pins the post-migration shape of the v21 config. The plugin schema
+// gate stamps Config.Version = 21 right after load, so by the time
 // /xlperf reaches this step the migration must already be complete
-// and the five v20 fields must carry their declared defaults on a
+// and the five v21 fields must carry their declared defaults on a
 // fresh install (or the saved values on an existing one). The probe
 // only verifies the version stamp and the field types — it does not
 // rewrite the user's config.
-internal sealed class ConfigMigrationV20Step : ISelfTestStep
+internal sealed class ConfigMigrationV21Step : ISelfTestStep
 {
-    public ConfigMigrationV20Step(Plugin plugin)
+    public ConfigMigrationV21Step(Plugin plugin)
     {
         _ = plugin;
     }
 
-    public string Name => "Hellion Chat - Config v20 migration";
+    public string Name => "Hellion Chat - Config v21 migration";
 
     public SelfTestStepResult RunStep()
     {
-        if (Plugin.Config.Version != 20)
+        if (Plugin.Config.Version != 21)
         {
-            ImGui.Text($"Config.Version is {Plugin.Config.Version}, expected 20");
+            ImGui.Text($"Config.Version is {Plugin.Config.Version}, expected 21");
             return SelfTestStepResult.Fail;
         }
 
@@ -54,6 +54,7 @@ internal sealed class ConfigMigrationV20Step : ISelfTestStep
         // here is just a touch-test that the property is reachable.
         _ = Plugin.Config.MainWindowOpen;
         _ = Plugin.Config.SettingsWindowOpen;
+        _ = Plugin.Config.ScreenshotMode;
 
         return SelfTestStepResult.Pass;
     }