feat(windows): add SettingsWindow skeleton (W1)

HellionChat/Ui/Windows/SettingsWindow.cs

@@ -0,0 +1,69 @@
+using System.Numerics;
+using Dalamud.Bindings.ImGui;
+using Dalamud.Interface.Windowing;
+using Dalamud.Utility;
+using HellionChat.Resources;
+using HellionChat.Ui.Components.Settings;
+using Microsoft.Extensions.Logging;
+
+namespace HellionChat.Ui.Windows;
+
+// `internal` to match the Plugin.SettingsWindow property in W2; `public` here
+// would raise CS0053 against the internal members. Matches MainWindow shape.
+internal sealed class SettingsWindow : Window
+{
+    private readonly Plugin _plugin;
+    private readonly TabSidebar _sidebar;
+    private readonly ContentArea _content;
+    private readonly ThemePicker _themePicker;
+    private readonly ColorPicker _colorPicker;
+    private readonly LivePreviewPanel _livePreview;
+
+    public SettingsWindow(
+        Plugin plugin,
+        TabSidebar sidebar,
+        ContentArea content,
+        ThemePicker themePicker,
+        ColorPicker colorPicker,
+        LivePreviewPanel livePreview,
+        ILoggerFactory loggerFactory
+    )
+        : base($"{Language.Settings_Title.Format(Plugin.PluginName)}###chat2-settings")
+    {
+        _plugin = plugin;
+        _sidebar = sidebar;
+        _content = content;
+        _themePicker = themePicker;
+        _colorPicker = colorPicker;
+        _livePreview = livePreview;
+        _ = loggerFactory;
+
+        Size = new Vector2(720, 540);
+        SizeCondition = ImGuiCond.FirstUseEver;
+        SizeConstraints = new WindowSizeConstraints
+        {
+            MinimumSize = new Vector2(600, 400),
+            MaximumSize = new Vector2(float.MaxValue, float.MaxValue),
+        };
+        Flags = ImGuiWindowFlags.NoCollapse;
+
+        // Carry-over from v1.6.0 stub: Escape must not auto-close, and toggle
+        // events must not play default Dalamud window sounds.
+        RespectCloseHotkey = false;
+        DisableWindowSounds = true;
+    }
+
+    public override void Draw()
+    {
+        _sidebar.Draw();
+        ImGui.SameLine();
+        _content.Draw(_sidebar.ActiveTab, RenderActiveTab);
+    }
+
+    private void RenderActiveTab(string tabId)
+    {
+        // M6-M12 fill these branches; skeleton renders a placeholder per tab so
+        // the smoke check confirms tab switching works.
+        ImGui.TextUnformatted($"[{tabId}] tab content lands in later task");
+    }
+}