feat(config): drop dead SidebarTabView and migrate false to top tabs (schema v23)

HellionChat/Plugin.cs

@@ -223,7 +223,17 @@ public sealed class Plugin : IAsyncDalamudPlugin
                     + "Please install v1.4.2 first to migrate the configuration, then upgrade to v1.4.10."
             );
         }
-        Config.Version = 22;
+        // v23 migration: SidebarTabView was the 1.5.6 sidebar↔top-tabs switch,
+        // superseded by MainWindowLayoutMode in the v1.6.0 rewrite. A user who
+        // set it false (only effective in 1.5.6) wanted top tabs — carry that
+        // intent forward. Runs only for pre-v23 configs; fresh configs load at
+        // LatestVersion and skip it. Additive v20/v22 fields keep their
+        // initializer defaults as before.
+        if (Config.Version < 23 && !Config.SidebarTabView)
+        {
+            Config.MainWindowLayoutMode = MainWindowLayoutMode.TopTabs;
+        }
+        Config.Version = 23;
 
         // Unpinned TempTabs are session-only and dropped on every load. Pinned
         // TempTabs survive reload — Jin's tester feedback (v1.4.7).
@@ -369,7 +379,7 @@ public sealed class Plugin : IAsyncDalamudPlugin
                 new SelfTests.SettingsWindowOpenStep(this),
                 new SelfTests.OnOpenMainUiRoutesMainWindowStep(this),
                 new SelfTests.TypingIpcStateStep(this),
-                new SelfTests.ConfigMigrationV22Step(this),
+                new SelfTests.ConfigMigrationV23Step(this),
                 new SelfTests.HoverSheenAllocStep(this),
                 new SelfTests.HonorificHeaderRenderStep(this),
                 new SelfTests.PerformanceBaselineStep(this),