test(ui): automation runner gains click at <x> <y> — raw synthetic canvas click

The vitals round's connected verify needed to click ONE specific
Character-tab option row, but every toggle row is a template instance
sharing the same dat element ids (0x10000218/0x10000219), so
`click element` (first-match by dat id) cannot address a row. The drive
script now reads the row's rect from its own `dump` line and clicks its
center — same synthetic UiRoot press/release route as ClickElement, never
the OS cursor (the same no-real-input constraint the morning gate's
hover/mousemove verbs follow).

Used live: the Side-By-Side Vitals checkbox + Apply choreography that
verified db8fa328's swap both directions over a real ACE session.

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

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

@@ -131,6 +131,22 @@ public sealed class RetailUiAutomationProbe
         return true;
     }
 
+    /// <summary>
+    /// Raw synthetic click at canvas coordinates (vitals retail-modes round,
+    /// 2026-08-17): the Options panel's Character-tab rows are template
+    /// instances sharing ONE dat element id per control
+    /// (<c>0x10000218</c>/<c>0x10000219</c> for every toggle row), so
+    /// element-id addressing cannot reach a SPECIFIC row's checkbox — a
+    /// drive script instead reads the row's rect from <see cref="DumpText"/>
+    /// and clicks its center. Same synthetic <see cref="UiRoot"/> route as
+    /// <see cref="ClickElement"/> — never the OS cursor.
+    /// </summary>
+    public bool ClickAtPoint(int x, int y)
+    {
+        ClickAt(x, y);
+        return true;
+    }
+
     /// <summary>
     /// 2026-08-17 morning gate: synthetic pointer HOVER (no click) at an
     /// element's center, for rollover/tooltip verification. Deliberately

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

@@ -219,7 +219,7 @@ public sealed class RetailUiAutomationScriptRunner : IDisposable
     private bool DoClick(ScriptCommand command)
     {
         var p = command.Parts;
-        if (p.Length < 3) return Stop(command, "usage: click element <datId> | click item <guid> [source]");
+        if (p.Length < 3) return Stop(command, "usage: click element <datId> | click item <guid> [source] | click at <x> <y>");
         string target = p[1].ToLowerInvariant();
         if (target == "element")
         {
@@ -231,7 +231,19 @@ public sealed class RetailUiAutomationScriptRunner : IDisposable
             if (!TryParseUInt(p[2], out uint itemGuid)) return Stop(command, $"bad item guid '{p[2]}'");
             return _probe.ClickItem(itemGuid, ParseSource(p, 3)) || Stop(command, "click item failed");
         }
-        return Stop(command, "usage: click element <datId> | click item <guid> [source]");
+        if (target == "at")
+        {
+            // `click at <x> <y>` — raw synthetic click in canvas coordinates
+            // (see RetailUiAutomationProbe.ClickAtPoint: template-instanced
+            // controls share one dat id, so a specific row is addressed by
+            // the rect its own `dump` line reports).
+            if (p.Length < 4
+                || !TryParseInt(p[2], out int x)
+                || !TryParseInt(p[3], out int y))
+                return Stop(command, "usage: click at <x> <y>");
+            return _probe.ClickAtPoint(x, y) || Stop(command, "click at failed");
+        }
+        return Stop(command, "usage: click element <datId> | click item <guid> [source] | click at <x> <y>");
     }
 
     /// <summary>2026-08-17 morning gate: `hover element &lt;datId&gt;` — a