feat(desktop): 固化样例世界与昼光呈现

[变更性质]
- this commit adds a deterministic desktop bootstrap for the playable sample world.

[新增功能]
- this commit places the avatar away from the home doorway and separates villagers from scene footprints.
- this commit provides a warm high-contrast daylight tint and exits autoplay after SampleComplete.

[实现方案]
- this commit isolates desktop spawn policy in WorldBootstrap and routes game startup and sample tests through it.
- this commit adds regression coverage for spawn positions, spacing, determinism, and daylight tint.

[影响范围]
- this commit affects the Desktop application and Desktop tests only.
- this commit preserves Kernel behavior and does not include unrelated worktree changes.

1 files changed, 7 insertions, 4 deletions

diff --git a/src/LivingVillage.Desktop/Game.fs b/src/LivingVillage.Desktop/Game.fs
index 1245e02..27e44a7 100644
--- a/src/LivingVillage.Desktop/Game.fs
+++ b/src/LivingVillage.Desktop/Game.fs
@@ -124,7 +124,7 @@ type LivingVillageGame() as this =
     let mutable cjkAtlas = Unchecked.defaultof<Texture2D>
     let mutable pixel = Unchecked.defaultof<Texture2D>
     let renderPlan = VillageArt.sampleRenderPlan ()
-    let mutable world = Sim.initialWorldN 42UL Sim.npcCount
+    let mutable world = WorldBootstrap.initialWorld 42UL Sim.npcCount
     let mutable camera = Vector2.Zero
     let mutable avatarFacing = VillageArt.SouthFacing
     let mutable fpsFrames = 0
@@ -168,7 +168,7 @@ type LivingVillageGame() as this =
         this.CenterCamera()
 
     member private this.StartNewGame() =
-        world <- Sim.initialWorldN 42UL Sim.npcCount
+        world <- WorldBootstrap.initialWorld 42UL Sim.npcCount
         this.ResetWorldView()
         menu <- menu |> MenuState.setCurrentWorld true |> MenuState.enterGame
         printfn $"new-game=ok seed=42 npcs={Sim.npcCount}"
@@ -258,6 +258,9 @@ type LivingVillageGame() as this =
         this.CenterCamera()
         if nextState.Stage <> stageBefore then
             printfn $"sample stage={nextState.Stage} tick={nextWorld.Tick} pos=({nextWorld.Avatar.Pos.X:F0},{nextWorld.Avatar.Pos.Y:F0})"
+            if nextState.Stage = SampleScript.SampleComplete then
+                printfn (if nextState.TimedOut then "sample result=timeout" else "sample result=ok")
+                this.Exit()
 
     member private this.UpdatePlaying (gameTime: GameTime) (kb: KeyboardState) (pressed: Keys -> bool) (pressedAny: Keys list -> bool) =
         if sampleMode then
@@ -552,9 +555,9 @@ type LivingVillageGame() as this =
         spriteBatch.Begin()
         match m5View.HomeMode with
         | Inside _ ->
-            VillageArt.drawInterior spriteBatch pixel artTextures viewport.Width viewport.Height renderPlan.Interior Color.White
+            VillageArt.drawInterior spriteBatch pixel artTextures viewport.Width viewport.Height renderPlan.Interior profile.WorldTint
             let interiorAvatarSpec = VillageArt.avatarSpriteSpec avatarFacing world.Tick
-            VillageArt.drawInteriorCharacter spriteBatch artTextures viewport.Width viewport.Height world.Avatar.Pos interiorAvatarSpec Color.White
+            VillageArt.drawInteriorCharacter spriteBatch artTextures viewport.Width viewport.Height world.Avatar.Pos interiorAvatarSpec profile.WorldTint
         | Outside ->
             VillageArt.drawWorld
                 spriteBatch