Merge campaign-enter-portal into the round branch: login portal-space presentation

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/AcDream.App/UI/Testing/RetailUiAutomationProbe.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
+using System.Numerics;
 using System.Text;
 using AcDream.Core.Items;
 
@@ -163,7 +164,9 @@ public sealed class RetailUiAutomationProbe
     {
         var target = FindByDatElementId(datElementId);
         if (target is null) return Fail($"element 0x{datElementId:X8} not found");
-        _root.OnMouseMove((int)target.CenterX, (int)target.CenterY);
+        // Same canvas→window conversion as ClickAt — see CanvasToWindow.
+        (int x, int y) = CanvasToWindow((int)target.CenterX, (int)target.CenterY);
+        _root.OnMouseMove(x, y);
         return true;
     }
 
@@ -298,8 +301,30 @@ public sealed class RetailUiAutomationProbe
         }
     }
 
+    /// <summary>
+    /// Enter-world round (2026-08-17): element coordinates from the probe's
+    /// tree walk are CANVAS coordinates, but <see cref="UiRoot.OnMouseMove"/>/
+    /// <c>OnMouseDown</c>/<c>OnMouseUp</c> take WINDOW coordinates and map
+    /// window→canvas internally (<c>UiRoot.MapWindowToCanvas</c>). The two
+    /// spaces are identical on every ordinary screen (no
+    /// <see cref="UiRoot.FixedCanvasSize"/>), which is why every prior probe
+    /// gate passed — the character-select/chargen screens are the first
+    /// STRETCHED canvases this apparatus drove, and there the mismatch sent
+    /// every synthetic click to canvas·(canvas/window), i.e. nowhere near the
+    /// target element. Element-derived pointer paths therefore convert
+    /// canvas→window here before touching the root.
+    /// </summary>
+    private (int x, int y) CanvasToWindow(int x, int y)
+    {
+        Vector2 scale = _root.CanvasScale;
+        return scale == Vector2.One
+            ? (x, y)
+            : ((int)MathF.Round(x * scale.X), (int)MathF.Round(y * scale.Y));
+    }
+
     private void ClickAt(int x, int y)
     {
+        (x, y) = CanvasToWindow(x, y);
         Advance(16);
         _root.OnMouseMove(x, y);
         _root.OnMouseDown(UiMouseButton.Left, x, y);
@@ -310,6 +335,8 @@ public sealed class RetailUiAutomationProbe
 
     private void DragAt(int startX, int startY, int endX, int endY)
     {
+        (startX, startY) = CanvasToWindow(startX, startY);
+        (endX, endY) = CanvasToWindow(endX, endY);
         Advance(16);
         _root.OnMouseMove(startX, startY);
         _root.OnMouseDown(UiMouseButton.Left, startX, startY);