feat(combat): port retail basic combat bar

Mount authored gmCombatUI, share one press/hold/release request state machine across DAT buttons and keybindings, and recover the exact 1.0s/0.8s power timing from matching retail x86. The same timer fixes jump charge, while ready-stance, response queueing, auto-repeat, layout binding, migration, and conformance coverage keep behavior architectural rather than panel-local.

Co-Authored-By: Codex <codex@openai.com>

tests/AcDream.App.Tests/UI/Layout/CombatUiControllerTests.cs

@@ -0,0 +1,106 @@
+using AcDream.App.Combat;
+using AcDream.App.UI;
+using AcDream.App.UI.Layout;
+using AcDream.Core.Combat;
+
+namespace AcDream.App.Tests.UI.Layout;
+
+public sealed class CombatUiControllerTests
+{
+    private static (uint, int, int) NoTex(uint _) => (0u, 0, 0);
+
+    [Fact]
+    public void CombatMode_ShowsOnlyTargetedModes_AndSelectsMediumByDefault()
+    {
+        double now = 0d;
+        var combat = new CombatState();
+        using var attacks = CreateAttacks(combat, () => now, []);
+        var (layout, _, _, power, high, medium, low) = BuildLayout();
+        var visibility = new List<bool>();
+        using var controller = CombatUiController.Bind(
+            layout, combat, attacks, visibility.Add)!;
+
+        controller.SyncVisibility();
+        combat.SetCombatMode(CombatMode.Melee);
+        combat.SetCombatMode(CombatMode.Magic);
+
+        Assert.Equal([false, true, false], visibility);
+        Assert.False(high.Selected);
+        Assert.True(medium.Selected);
+        Assert.False(low.Selected);
+        Assert.Equal(CombatAttackController.InitialDesiredPower, power.ScalarPosition);
+    }
+
+    [Fact]
+    public void AuthoredHeightButton_PressChargesAndReleaseSendsThroughSharedController()
+    {
+        double now = 4d;
+        var sent = new List<(AttackHeight Height, float Power)>();
+        var combat = new CombatState();
+        using var attacks = CreateAttacks(combat, () => now, sent);
+        var (layout, basic, advanced, power, high, _, _) = BuildLayout();
+        using var controller = CombatUiController.Bind(
+            layout, combat, attacks, _ => { })!;
+        combat.SetCombatMode(CombatMode.Melee);
+
+        high.OnEvent(new UiEvent(0, high, UiEventType.MouseDown, Data1: 2, Data2: 2));
+        now = 4.5d;
+        Assert.Equal(0.5f, power.ScalarFill()!.Value, 3);
+        high.OnEvent(new UiEvent(0, high, UiEventType.MouseUp, Data1: 2, Data2: 2));
+
+        var attack = Assert.Single(sent);
+        Assert.Equal(AttackHeight.High, attack.Height);
+        Assert.Equal(0.5f, attack.Power, 3);
+        Assert.True(basic.Visible);
+        Assert.False(advanced.Visible);
+    }
+
+    private static CombatAttackController CreateAttacks(
+        CombatState combat,
+        Func<double> now,
+        List<(AttackHeight Height, float Power)> sent)
+        => new(
+            combat,
+            () => true,
+            (height, power) =>
+            {
+                sent.Add((height, power));
+                return true;
+            },
+            autoRepeatAttack: () => false,
+            now: now);
+
+    private static (
+        ImportedLayout Layout,
+        UiElement Basic,
+        UiElement Advanced,
+        UiScrollbar Power,
+        UiButton High,
+        UiButton Medium,
+        UiButton Low) BuildLayout()
+    {
+        var root = new UiPanel { Width = 610, Height = 90 };
+        var basic = new UiPanel();
+        var advanced = new UiPanel();
+        var power = new UiScrollbar { Width = 507, Height = 14, Horizontal = true };
+        UiButton Button(uint id) => new(
+            new ElementInfo { Id = id, Type = 1, Width = 72, Height = 19 }, NoTex)
+        {
+            Width = 72,
+            Height = 19,
+        };
+        var high = Button(CombatUiController.HighButtonId);
+        var medium = Button(CombatUiController.MediumButtonId);
+        var low = Button(CombatUiController.LowButtonId);
+        var byId = new Dictionary<uint, UiElement>
+        {
+            [CombatUiController.BasicPanelId] = basic,
+            [CombatUiController.AdvancedPanelId] = advanced,
+            [CombatUiController.PowerControlId] = power,
+            [CombatUiController.HighButtonId] = high,
+            [CombatUiController.MediumButtonId] = medium,
+            [CombatUiController.LowButtonId] = low,
+        };
+        return (new ImportedLayout(root, byId), basic, advanced, power, high, medium, low);
+    }
+}

tests/AcDream.App.Tests/UI/Layout/DatWidgetFactoryTests.cs

@@ -451,6 +451,47 @@ public class DatWidgetFactoryTests
         Assert.Equal(gold, t.DefaultColor);
     }
 
+    [Fact]
+    public void HorizontalScrollbar_PreservesNestedCombatMeterFillSprite()
+    {
+        var track = new ElementInfo { Id = 4, Type = 3, Width = 507, Height = 14 };
+        track.StateMedia[""] = (0x06001919u, 1);
+        track.States[UiStateInfo.DirectStateId] = new UiStateInfo
+            { Id = UiStateInfo.DirectStateId, Image = new UiImageMedia(0x06001919u, 1) };
+        var thumb = new ElementInfo { Id = 1, Type = 1, Width = 12, Height = 14 };
+        thumb.StateMedia[""] = (0x06001923u, 1);
+        thumb.States[UiStateInfo.DirectStateId] = new UiStateInfo
+            { Id = UiStateInfo.DirectStateId, Image = new UiImageMedia(0x06001923u, 1) };
+        var fill = new ElementInfo { Id = 2, Type = 3, Width = 507, Height = 14 };
+        fill.StateMedia[""] = (0x06001200u, 1);
+        fill.States[UiStateInfo.DirectStateId] = new UiStateInfo
+            { Id = UiStateInfo.DirectStateId, Image = new UiImageMedia(0x06001200u, 1) };
+        var meter = new ElementInfo
+        {
+            Id = CombatUiController.PowerControlId + 1,
+            Type = 7,
+            Width = 507,
+            Height = 14,
+            Children = [fill],
+        };
+        var info = new ElementInfo
+        {
+            Id = CombatUiController.PowerControlId,
+            Type = 11,
+            Width = 507,
+            Height = 14,
+            Children = [track, meter, thumb],
+        };
+
+        var bar = Assert.IsType<UiScrollbar>(
+            DatWidgetFactory.Create(info, NoTex, null));
+
+        Assert.True(bar.Horizontal);
+        Assert.Equal(0x06001919u, bar.TrackSprite);
+        Assert.Equal(0x06001923u, bar.ThumbSprite);
+        Assert.Equal(0x06001200u, bar.ScalarFillSprite);
+    }
+
     private static ElementInfo TextInfo(params (uint Id, UiPropertyValue Value)[] properties)
     {
         var info = new ElementInfo { Id = 0x10000016u, Type = 12, Width = 100, Height = 20 };