feat(desktop): P38 HUD 图标化升级（时段/时间/倍速/体力/钱币）

顶部常驻条每个状态段前加 7x7 原创点阵图标（用 pixel 贴图绘制，无外部素材）：
时段=太阳、时间=钟、倍速=双箭头、体力=心形、钱币=圆形钱眼。图标占
iconWidth+iconGap 后接文本，段总宽含图标；底色药丸与 1px 描边同覆盖图标与文本，
昼夜两套调色板均可读；仍为半透明窄条（barHeight 不变，非大黑块）。

1 files changed, 77 insertions, 8 deletions

diff --git a/src/LivingVillage.Desktop/HudLayout.fs b/src/LivingVillage.Desktop/HudLayout.fs
index f3e4c12..05fce33 100644
--- a/src/LivingVillage.Desktop/HudLayout.fs
+++ b/src/LivingVillage.Desktop/HudLayout.fs
@@ -14,32 +14,101 @@ module HudLayout =
     let segmentGap = 20
     let textScale = 2
 
+    /// 常驻段的像素图标（7x7 点阵，按 iconScale 放大），全部用 pixel 贴图绘制、无外部素材。
+    type HudIcon =
+        | PeriodIcon
+        | ClockIcon
+        | SpeedIcon
+        | EnergyIcon
+        | MoneyIcon
+
     type Segment =
         { Label: string
-          Value: string }
+          Value: string
+          Icon: HudIcon }
 
     let segmentText (segment: Segment) : string = sprintf "%s %s" segment.Label segment.Value
 
     /// 常驻状态片段，数值全部取自世界真实状态，绝不编造。
     let segments (world: World) (control: SimulationControl) : Segment list =
         let needs = world.Avatar.Mind.Needs
-        [ { Label = "时段"; Value = M6Presentation.timePeriodLabel world.Tick }
-          { Label = "时间"; Value = M6Presentation.clockTimeLabel world.Tick }
-          { Label = "倍速"; Value = M6Presentation.speedLabel control }
-          { Label = "体力"; Value = sprintf "%.0f" needs.Energy }
-          { Label = "钱币"; Value = sprintf "%.0f" needs.Money } ]
+        [ { Label = "时段"; Value = M6Presentation.timePeriodLabel world.Tick; Icon = PeriodIcon }
+          { Label = "时间"; Value = M6Presentation.clockTimeLabel world.Tick; Icon = ClockIcon }
+          { Label = "倍速"; Value = M6Presentation.speedLabel control; Icon = SpeedIcon }
+          { Label = "体力"; Value = sprintf "%.0f" needs.Energy; Icon = EnergyIcon }
+          { Label = "钱币"; Value = sprintf "%.0f" needs.Money; Icon = MoneyIcon } ]
+
+    // ---- 图标几何与点阵（纯数据/纯函数，Game 与回归测试共用）----
+
+    let iconGrid = 7
+    let iconScale = textScale
+    let iconWidth = iconGrid * iconScale
+    let iconHeight = iconGrid * iconScale
+    let iconGap = 6
+
+    /// 7x7 点阵，'1' 为实心。全部原创点阵，仅用现有像素贴图绘制。
+    let iconRows (icon: HudIcon) : string list =
+        match icon with
+        | PeriodIcon ->
+            [ "0001000"
+              "1010101"
+              "0011100"
+              "0111110"
+              "0011100"
+              "1010101"
+              "0001000" ]
+        | ClockIcon ->
+            [ "0011100"
+              "0100010"
+              "1001001"
+              "1001000"
+              "1001000"
+              "0100010"
+              "0011100" ]
+        | SpeedIcon ->
+            [ "0100010"
+              "0110011"
+              "0011011"
+              "0001110"
+              "0011011"
+              "0110011"
+              "0100010" ]
+        | EnergyIcon ->
+            [ "0000000"
+              "0101010"
+              "1111111"
+              "1111111"
+              "0111110"
+              "0011100"
+              "0001000" ]
+        | MoneyIcon ->
+            [ "0011100"
+              "0111110"
+              "1110111"
+              "1100011"
+              "1110111"
+              "0111110"
+              "0011100" ]
+
+    /// 文本起始 x（图标占 iconWidth + iconGap）。
+    let textOrigin (segmentX: int) : int = segmentX + iconWidth + iconGap
 
     /// 段文本（含标签）的像素宽度。
     let segmentWidth (segment: Segment) : int =
         FloatingPrompt.measureWidth (segmentText segment) textScale
 
-    /// 左对齐排布，返回 (起点 x, 宽度, 分段)；纯函数，便于布局回归断言。
+    /// 段总宽（图标 + 间隙 + 文本）。
+    let segmentSpan (segment: Segment) : int =
+        iconWidth + iconGap + segmentWidth segment
+
+    /// 左对齐排布，返回 (起点 x, 总宽, 分段)；段内 x 起为图标，textOrigin 起为文本。
+    /// 纯函数，便于布局回归断言。
     let layout (segments: Segment list) : (int * int * Segment) list =
         let _, placed =
             segments
             |> List.fold
                 (fun (x, acc) segment ->
-                    let width = segmentWidth segment
+                    let width = segmentSpan segment
                     x + width + segmentGap, (x, width, segment) :: acc)
                 (paddingX, [])
         List.rev placed