fix(desktop): P19 白天色调去偏黄（day tint 中性白平衡，黄昏暖橙保留）p19-daylight-taming

1 files changed, 6 insertions, 4 deletions

diff --git a/src/LivingVillage.Desktop/M6Presentation.fs b/src/LivingVillage.Desktop/M6Presentation.fs
index 25737d7..90d2e65 100644
--- a/src/LivingVillage.Desktop/M6Presentation.fs
+++ b/src/LivingVillage.Desktop/M6Presentation.fs
@@ -76,13 +76,15 @@ module M6Presentation =
             lerp 160 25 blend + int (20.0f * warmth),
             lerp 210 55 blend - int (90.0f * warmth))
 
-    /// World tint also warms (red up, green slightly down, blue down) so tiles, props and
-    /// characters all lean golden before the additive veil is layered on top.
+    /// World tint multiplies the whole scene. The day baseline is neutral white so noon keeps
+    /// a true white balance (the old day base 255/248/224 clipped blue by ~12% and made daylight
+    /// look yellow); night stays cool, and the golden shade only appears through `warmth`, which
+    /// is a pure function that is zero at noon and outside the dawn/dusk windows.
     let worldTintAtWarmth (blend: float32) (warmth: float32) : Color =
         Color(
             lerp 255 118 blend + int (70.0f * warmth),
-            lerp 248 136 blend - int (10.0f * warmth),
-            lerp 224 184 blend - int (75.0f * warmth))
+            lerp 255 136 blend - int (10.0f * warmth),
+            lerp 255 184 blend - int (75.0f * warmth))
 
     /// Warmth-free base colours (kept for callers that only have a blend value).
     let backgroundAtBlend (blend: float32) : Color = backgroundAtWarmth blend 0.0f