fix(test): UI probe pointer commands convert canvas to window coordinates; char-select Enter logs its outcome

The automation probe fed element-center CANVAS coordinates straight into
UiRoot.OnMouseMove/Down/Up, which take WINDOW coordinates and map
window->canvas internally (UiRoot.MapWindowToCanvas). The two spaces are
identical on every screen without UiRoot.FixedCanvasSize — every prior
probe gate passed — but the character-select/chargen screens stretch an
authored 800x600 canvas across the window, so every synthetic click and
hover landed at canvas*(canvas/window): nowhere near the target. The
enter-world connected gate's 'click element 0x100003A2' silently did
nothing for two full rounds. Element-derived pointer paths (ClickAt,
DragAt, HoverElement) now convert canvas->window via UiRoot.CanvasScale;
raw 'mousemove x y' stays a passthrough.

CharacterManagementUiController.EnterSelected also logs a once-per-click
outcome line ('[UI] character enter accepted/rejected status=...') — a
refused Enter was previously indistinguishable from a click that never
dispatched (both silent), which cost a connected-gate round to tell
apart.

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

src/AcDream.App/UI/Layout/CharacterManagementUiController.cs

@@ -580,6 +580,13 @@ internal sealed class CharacterManagementUiController : IDisposable
         // remains authoritative and closes it on InWorld/error/reset.
         EnsureEnterWait();
         RuntimeCommandResult result = _bindings.Enter();
+        // Enter-world round (2026-08-17): once-per-click outcome line — a
+        // refused Enter was previously indistinguishable from a click that
+        // never dispatched (both silent), which cost a full connected-gate
+        // round to tell apart.
+        Console.WriteLine(result.Accepted
+            ? "[UI] character enter accepted"
+            : $"[UI] character enter rejected status={result.Status}");
         if (!result.Accepted)
             CloseContext(ref _enterWaitContext, suppressCallback: true);
         InvalidateAndTick();

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;
 
@@ -147,7 +148,9 @@ 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;
     }
 
@@ -282,8 +285,30 @@ 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);
@@ -294,6 +319,8 @@ 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);