Implement Godot UX scene scaffold

src/ReactorMaintenance.Godot/Screens/LevelScreen.cs

@@ -0,0 +1,107 @@
+using Godot;
+using ReactorMaintenance.Godot.Controls;
+using ReactorMaintenance.Godot.Data;
+
+namespace ReactorMaintenance.Godot.Screens;
+
+public partial class LevelScreen : ScreenBase
+{
+    public void Configure(AppController app, CampaignLevel level, int levelNumber, int levelCount)
+    {
+        m_App = app;
+        m_Level = level;
+
+        var body = CreatePage(string.Empty);
+        var header = new LevelHeader();
+        body.AddChild(header);
+        header.SetLevel(level, levelNumber, levelCount, "Stable");
+
+        var flavor = CreateBodyText(level.FlavorText);
+        flavor.HorizontalAlignment = HorizontalAlignment.Left;
+        body.AddChild(flavor);
+
+        var split = new HSplitContainer { SizeFlagsVertical = SizeFlags.ExpandFill };
+        body.AddChild(split);
+
+        split.AddChild(CreateGridPlaceholder());
+        split.AddChild(CreateSidePanel(level));
+
+        body.AddChild(new InventoryStrip());
+        body.AddChild(CreateActionBar());
+
+        m_OverlayLayer = new();
+        AddChild(m_OverlayLayer);
+    }
+
+    private static PanelContainer CreateGridPlaceholder()
+    {
+        var panel = new PanelContainer { CustomMinimumSize = new(560, 360), SizeFlagsHorizontal = SizeFlags.ExpandFill, SizeFlagsVertical = SizeFlags.ExpandFill };
+        var label = new Label {
+            Text = "Level Grid Placeholder\nRobot marker, terrain, props, hazards, and underground overlays will render here.",
+            HorizontalAlignment = HorizontalAlignment.Center,
+            VerticalAlignment = VerticalAlignment.Center,
+            AutowrapMode = TextServer.AutowrapMode.WordSmart
+        };
+        panel.AddChild(label);
+        return panel;
+    }
+
+    private static VBoxContainer CreateSidePanel(CampaignLevel level)
+    {
+        var sidePanel = new VBoxContainer { CustomMinimumSize = new(300, 0) };
+        sidePanel.AddChild(new Label { Text = "Inspector" });
+        sidePanel.AddChild(new CellInspector());
+        sidePanel.AddChild(new ForecastList());
+        sidePanel.AddChild(new Label { Text = $"Level JSON: {level.LevelPath}", AutowrapMode = TextServer.AutowrapMode.WordSmart });
+        return sidePanel;
+    }
+
+    private HBoxContainer CreateActionBar()
+    {
+        var actions = new HBoxContainer();
+        actions.AddChild(CreateButton("Move", () => { }, "Quick action placeholder"));
+        actions.AddChild(CreateButton("Interact", () => { }, "Lengthy action placeholder"));
+        actions.AddChild(CreateButton("Repair", () => { }, "Lengthy action placeholder"));
+        actions.AddChild(CreateButton("Trigger Win", ShowWinOverlay));
+        actions.AddChild(CreateButton("Trigger Lose", ShowLoseOverlay));
+        actions.AddChild(CreateButton("Main Menu", () => m_App?.ShowMainMenu()));
+        return actions;
+    }
+
+    private void ShowLoseOverlay()
+    {
+        if (m_OutcomeVisible || m_App is null || m_Level is null || m_OverlayLayer is null)
+            return;
+
+        m_OutcomeVisible = true;
+        var overlay = new LoseOverlay();
+        overlay.Configure(m_Level, m_App.RetryCurrentLevel, m_App.ShowGameOver, m_App.ShowMainMenu);
+        AddCenteredOverlay(overlay);
+    }
+
+    private void ShowWinOverlay()
+    {
+        if (m_OutcomeVisible || m_App is null || m_Level is null || m_OverlayLayer is null)
+            return;
+
+        m_OutcomeVisible = true;
+        var overlay = new WinOverlay();
+        overlay.Configure(m_Level, m_App.CompleteCurrentLevel, m_App.ShowMainMenu);
+        AddCenteredOverlay(overlay);
+    }
+
+    private void AddCenteredOverlay(Control overlay)
+    {
+        var center = new CenterContainer {
+            AnchorRight = 1,
+            AnchorBottom = 1
+        };
+        center.AddChild(overlay);
+        m_OverlayLayer?.AddChild(center);
+    }
+
+    private AppController? m_App;
+    private CampaignLevel? m_Level;
+    private bool m_OutcomeVisible;
+    private CanvasLayer? m_OverlayLayer;
+}