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.

tests/AcDream.Core.Tests/Items/ItemInteractionPolicyTests.cs

@@ -147,9 +147,53 @@ public sealed class ItemInteractionPolicyTests
         Assert.Equal(ItemPolicyActionKind.Reject,
             Assert.Single(ItemInteractionPolicy.DecideUse(
                 Use(direct with { TradeState = 1 })).Actions).Kind);
-        Assert.Contains("wield", Assert.Single(ItemInteractionPolicy.DecideUse(
-            Use(direct with { Useability = ItemUseability.Wielded })).Actions).Message,
-            StringComparison.OrdinalIgnoreCase);
+        Assert.Equal("You cannot use the item because you are trading it",
+            Assert.Single(ItemInteractionPolicy.DecideUse(
+                Use(direct with { TradeState = 1 })).Actions).Message);
+        Assert.Equal("You must wield the item to use it",
+            Assert.Single(ItemInteractionPolicy.DecideUse(
+                Use(direct with { Useability = ItemUseability.Wielded })).Actions).Message);
+    }
+
+    [Fact]
+    public void UseObject_targetCompatibilityFailures_useRetailVerbatimMessages()
+    {
+        var source = OwnedDirect() with
+        {
+            Name = "mana stone",
+            Useability = 0x00080008u,
+            TargetType = (uint)ItemType.Misc,
+        };
+        var target = Obj(0x6002) with
+        {
+            Name = "armor",
+            Type = ItemType.Armor,
+            ContainerId = Player,
+            OwnedByPlayer = true,
+        };
+
+        var missing = ItemInteractionPolicy.DecideUse(Use(source) with
+        {
+            UseCurrentSelection = true,
+        });
+        Assert.Equal("Select your target before using the mana stone",
+            Assert.Single(missing.Actions).Message);
+
+        var incompatible = ItemInteractionPolicy.DecideUse(Use(source) with
+        {
+            UseCurrentSelection = true,
+            SelectedTarget = target,
+        });
+        Assert.Equal("Cannot use the mana stone with the armor",
+            Assert.Single(incompatible.Actions).Message);
+
+        var traded = ItemInteractionPolicy.DecideUse(Use(source) with
+        {
+            UseCurrentSelection = true,
+            SelectedTarget = target with { TradeState = 1 },
+        });
+        Assert.Equal("You can't use the mana stone on an item you are trading",
+            Assert.Single(traded.Actions).Message);
     }
 
     [Fact]
@@ -219,7 +263,7 @@ public sealed class ItemInteractionPolicyTests
             PlayerOnGround = false,
         });
         Assert.False(airborne.ReturnValue);
-        Assert.Equal(ItemPolicyActionKind.Reject, Assert.Single(airborne.Actions).Kind);
+        Assert.Equal("You cannot do that in mid air", Assert.Single(airborne.Actions).Message);
 
         var split = ItemInteractionPolicy.DecidePlacement(PlaceOnGround(item) with { SplitSize = 4 });
         Assert.True(split.ReturnValue);
@@ -232,8 +276,7 @@ public sealed class ItemInteractionPolicyTests
         var alreadyWorld = ItemInteractionPolicy.DecidePlacement(
             PlaceOnGround(item with { IsIn3DView = true }));
         Assert.False(alreadyWorld.ReturnValue);
-        Assert.Contains("cancelled", Assert.Single(alreadyWorld.Actions).Message,
-            StringComparison.OrdinalIgnoreCase);
+        Assert.Equal("Move cancelled", Assert.Single(alreadyWorld.Actions).Message);
     }
 
     [Fact]