fix(client): restore retail interaction parity

Harden keyboard and camera routing, inventory and vendor interactions, chat/emotes, relog portal flow, and paperdoll rendering. Add retail research, connected gate coverage, and release-gate validation.

src/AcDream.Core/Input/RetailActionMap.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using AcDream.Core.Content;
 using DatReaderWriter.DBObjs;
+using DatReaderWriter.Types;
 
 namespace AcDream.Core.Input;
 
@@ -124,7 +125,23 @@ public sealed record RetailActionMapRow(
 
 /// <summary>The complete read result: every user-bindable ActionMap row, plus the raw
 /// row count read (for conformance pinning against the installed dats).</summary>
-public sealed record RetailActionMapSnapshot(IReadOnlyList<RetailActionMapRow> Rows);
+public sealed record RetailActionMapSnapshot(
+    IReadOnlyList<RetailActionMapRow> Rows,
+    IReadOnlyDictionary<uint, IReadOnlySet<uint>>? ConflictingInputMaps = null)
+{
+    /// <summary>
+    /// Retail <c>ICIDM::FindConflictingInputMaps</c> policy. A context always
+    /// conflicts with itself; cross-context conflicts exist only when the
+    /// DAT <c>ActionMap.ConflictingMaps</c> table names the other context.
+    /// Contexts absent from that table therefore do not conflict across maps.
+    /// </summary>
+    public bool InputMapsConflict(uint leftInputMapId, uint rightInputMapId) =>
+        leftInputMapId == rightInputMapId
+        || (ConflictingInputMaps?.TryGetValue(
+                leftInputMapId,
+                out IReadOnlySet<uint>? conflicts) == true
+            && conflicts.Contains(rightInputMapId));
+}
 
 /// <summary>
 /// Retail's 19 named <c>InputMapID -&gt; ID_InputMap_*</c> string-table keys
@@ -220,7 +237,16 @@ public static class RetailActionMapReader
             }
         }
 
-        return new RetailActionMapSnapshot(rows);
+        var conflictingInputMaps = new Dictionary<uint, IReadOnlySet<uint>>();
+        foreach (var entry in actionMap.ConflictingMaps)
+        {
+            InputsConflictsValue value = entry.Value;
+            uint inputMapId = value.InputMap != 0u ? value.InputMap : entry.Key;
+            conflictingInputMaps[inputMapId] =
+                new HashSet<uint>(value.ConflictingInputMaps);
+        }
+
+        return new RetailActionMapSnapshot(rows, conflictingInputMaps);
     }
 
     private static void CollectDefaults(