feat(desktop): localize village presentation labels

[Change Nature]
- This commit adds the Chinese display layer for the desktop village prototype.

[New Capability]
- Menu, settings, controls, interaction panels, chronicle entries, trade results, day-night labels, and speed labels now use Chinese copy.

[Implementation]
- Keep simulation state, commands, and machine-readable status strings unchanged.
- Add focused formatter coverage and update affected presentation assertions.

[Impact]
- Desktop presentation behavior is localized without changing Kernel or simulation logic.
- Existing release build and test coverage remain green.

3 files changed, 81 insertions, 5 deletions

diff --git a/src/LivingVillage.Desktop.Tests/DesktopTests.fs b/src/LivingVillage.Desktop.Tests/DesktopTests.fs
index 650f757..1c175ce 100644
--- a/src/LivingVillage.Desktop.Tests/DesktopTests.fs
+++ b/src/LivingVillage.Desktop.Tests/DesktopTests.fs
@@ -22,7 +22,7 @@ type DesktopTests () =
         Assert.AreEqual<World>(world, next)
         Assert.AreEqual<M5Panel>(DialoguePanel, view.Panel)
         Assert.AreEqual<int>(6, view.Menu.Value.Options.Length)
-        Assert.IsTrue(M5Interaction.titleText view |> fun text -> text.Contains("SMALLTALK"))
+        Assert.IsTrue(M5Interaction.titleText view |> fun text -> text.Contains("闲聊"))
 
     [<TestMethod>]
     member _.SelectingAnIntentUpdatesWorldAndChronicle () =
diff --git a/src/LivingVillage.Desktop.Tests/M6aTests.fs b/src/LivingVillage.Desktop.Tests/M6aTests.fs
index 1cc29d4..04920d4 100644
--- a/src/LivingVillage.Desktop.Tests/M6aTests.fs
+++ b/src/LivingVillage.Desktop.Tests/M6aTests.fs
@@ -9,7 +9,7 @@ type M6aDesktopTests () =
 
     [<TestMethod>]
     member _.SpeedLabelsExposePauseAndThreeRunningModes () =
-        Assert.AreEqual<string>("PAUSED", M6Presentation.clockLabel { Paused = true; Speed = OneX })
-        Assert.AreEqual<string>("1X", M6Presentation.clockLabel { Paused = false; Speed = OneX })
-        Assert.AreEqual<string>("2X", M6Presentation.clockLabel { Paused = false; Speed = TwoX })
-        Assert.AreEqual<string>("5X", M6Presentation.clockLabel { Paused = false; Speed = FiveX })
+        Assert.AreEqual<string>("暂停", M6Presentation.clockLabel { Paused = true; Speed = OneX })
+        Assert.AreEqual<string>("1倍速", M6Presentation.clockLabel { Paused = false; Speed = OneX })
+        Assert.AreEqual<string>("2倍速", M6Presentation.clockLabel { Paused = false; Speed = TwoX })
+        Assert.AreEqual<string>("5倍速", M6Presentation.clockLabel { Paused = false; Speed = FiveX })
diff --git a/src/LivingVillage.Desktop.Tests/PrototypeTests.fs b/src/LivingVillage.Desktop.Tests/PrototypeTests.fs
index b959d70..3abb064 100644
--- a/src/LivingVillage.Desktop.Tests/PrototypeTests.fs
+++ b/src/LivingVillage.Desktop.Tests/PrototypeTests.fs
@@ -1,7 +1,10 @@
 namespace LivingVillage.Desktop.Tests
 
+open System
 open Microsoft.VisualStudio.TestTools.UnitTesting
+open LivingVillage.Kernel
 open LivingVillage.Kernel.Sim
+open LivingVillage.Desktop
 open LivingVillage.Desktop.VillagePresentation
 
 [<TestClass>]
@@ -100,3 +103,76 @@ type PrototypeTests () =
         Assert.AreEqual<string>("需求", stageOneCopy.Needs)
         Assert.AreEqual<string>("交易", stageOneCopy.Trade)
         Assert.AreEqual<string>("进入民居", stageOneCopy.EnterHome)
+
+    [<TestMethod>]
+    member _.MenuControlsAndSettingsUseChineseDisplayCopy () =
+        let state = MenuState.create SimulationControl.initial false
+        let itemLabels = MenuState.items state |> List.map MenuState.itemLabel
+        let controlLabels = MenuState.controlRows |> List.map (fun row -> row.Action)
+        let settingsLabels = MenuState.settings |> List.map MenuState.settingsLabel
+
+        Assert.IsTrue(itemLabels |> List.contains "开始新游戏")
+        Assert.IsTrue(itemLabels |> List.contains "读取存档")
+        Assert.IsTrue(itemLabels |> List.contains "设置")
+        Assert.IsTrue(itemLabels |> List.contains "退出")
+        Assert.AreEqual<string list>(
+            [ "移动"
+              "互动"
+              "对话"
+              "观察"
+              "需求"
+              "年鉴"
+              "关系"
+              "暂停"
+              "速度"
+              "保存"
+              "读取"
+              "菜单或关闭"
+              "选择"
+              "确认" ],
+            controlLabels)
+        Assert.AreEqual<string list>([ "1倍速"; "2倍速"; "5倍速"; "暂停" ], settingsLabels)
+
+    [<TestMethod>]
+    member _.InteractionPanelsUseChineseLabelsAndExplicitTradeResults () =
+        let world = Sim.initialWorldN 42UL 4
+        let nearby =
+            { world with
+                Avatar = { world.Avatar with Pos = world.Npcs.[0].Pos } }
+        let openedWorld, opened = M5Interaction.apply Interact nearby M5Interaction.initial
+        let title = M5Interaction.titleText opened
+        let needsWorld, needsView = M5Interaction.apply ToggleNeeds openedWorld opened
+        let needsText = String.concat "|" (M5Interaction.panelLines needsWorld needsView)
+        let _, chronicleView = M5Interaction.apply ShowChronicle nearby M5Interaction.initial
+        let chronicleText = String.concat "|" (M5Interaction.panelLines nearby chronicleView)
+        let request =
+            { Buyer = NpcId 0
+              Seller = NpcId 1
+              Item = Food
+              Quantity = 1 }
+        let quote = Sim.quotePrice request nearby
+        let successText = M5Interaction.tradeResultText request quote (Sim.trade request nearby)
+        let failureRequest = { request with Quantity = 0 }
+        let failureText =
+            M5Interaction.tradeResultText failureRequest (Sim.quotePrice failureRequest nearby) (Sim.trade failureRequest nearby)
+
+        Assert.IsTrue(title.Contains("互动"))
+        Assert.IsTrue(title.Contains("闲聊"))
+        Assert.IsFalse(title.Contains("SMALLTALK"))
+        Assert.IsTrue(needsText.Contains("需求"))
+        Assert.IsTrue(needsText.Contains("饥饿"))
+        Assert.IsTrue(chronicleText.Contains("年鉴"))
+        Assert.IsTrue(chronicleText.Contains("暂无记录"))
+        Assert.IsTrue(successText.Contains("交易成功"))
+        Assert.IsTrue(successText.Contains("报价"))
+        Assert.IsTrue(failureText.Contains("交易失败"))
+        Assert.IsTrue(failureText.Contains("数量"))
+
+    [<TestMethod>]
+    member _.DayNightAndSpeedUseChineseDisplayCopy () =
+        Assert.AreEqual<string>("白天", M6Presentation.dayNightLabel Day)
+        Assert.AreEqual<string>("夜晚", M6Presentation.dayNightLabel Night)
+        Assert.AreEqual<string>("暂停", M6Presentation.clockLabel { Paused = true; Speed = OneX })
+        Assert.AreEqual<string>("1倍速", M6Presentation.clockLabel { Paused = false; Speed = OneX })
+        Assert.AreEqual<string>("2倍速", M6Presentation.clockLabel { Paused = false; Speed = TwoX })
+        Assert.AreEqual<string>("5倍速", M6Presentation.clockLabel { Paused = false; Speed = FiveX })