refactor: 用 associateWith 简化星期标签 map 构造

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

shared/src/commonMain/kotlin/plus/rua/project/ui/YearGridView.kt

@@ -128,8 +128,8 @@ fun YearGridView(
 
     // P0-H: 预测量星期标签
     val weekdayLayouts = remember(textMeasurer, colors) {
-        WEEKDAY_LABELS.associate { label ->
-            label to textMeasurer.measure(label, TextStyle(fontSize = 8.sp, color = colors.weekday))
+        WEEKDAY_LABELS.associateWith { label ->
+            textMeasurer.measure(label, TextStyle(fontSize = 8.sp, color = colors.weekday))
         }
     }