feat(health): 新增手腕温度监测和经期双向同步功能

新增手腕温度健康数据追踪，支持Apple Watch睡眠手腕温度数据展示和30天历史趋势分析
实现经期数据与HealthKit的完整双向同步，支持读取、写入和删除经期记录
优化经期预测算法，基于历史数据计算更准确的周期和排卵日预测
重构经期UI组件为模块化结构，提升代码可维护性
添加完整的中英文国际化支持，覆盖所有新增功能界面

components/menstrual-cycle/DayCell.tsx

@@ -0,0 +1,75 @@
+import { Colors } from '@/constants/Colors';
+import React from 'react';
+import { StyleSheet, Text, TouchableOpacity, View } from 'react-native';
+import { STATUS_COLORS } from './constants';
+import { DayCellProps } from './types';
+
+export const DayCell: React.FC<DayCellProps> = ({ cell, isSelected, onPress }) => {
+  const status = cell.info?.status;
+  const colors = status ? STATUS_COLORS[status] : undefined;
+
+  return (
+    <TouchableOpacity
+      activeOpacity={0.8}
+      style={styles.dayCell}
+      onPress={onPress}
+    >
+      <View
+        style={[
+          styles.dayCircle,
+          colors && { backgroundColor: colors.bg },
+          isSelected && styles.dayCircleSelected,
+          cell.isToday && styles.todayOutline,
+        ]}
+      >
+        <Text
+          style={[
+            styles.dayLabel,
+            colors && { color: colors.text },
+            !colors && styles.dayLabelDefault,
+          ]}
+        >
+          {cell.label}
+        </Text>
+      </View>
+      {cell.isToday && <Text style={styles.todayText}>今天</Text>}
+    </TouchableOpacity>
+  );
+};
+
+const styles = StyleSheet.create({
+  dayCell: {
+    width: '14.28%',
+    alignItems: 'center',
+    marginVertical: 6,
+  },
+  dayCircle: {
+    width: 40,
+    height: 40,
+    borderRadius: 20,
+    alignItems: 'center',
+    justifyContent: 'center',
+    backgroundColor: '#f3f4f6',
+  },
+  dayCircleSelected: {
+    borderWidth: 2,
+    borderColor: Colors.light.primary,
+  },
+  todayOutline: {
+    borderWidth: 2,
+    borderColor: '#94a3b8',
+  },
+  dayLabel: {
+    fontSize: 15,
+    fontFamily: 'AliBold',
+  },
+  dayLabelDefault: {
+    color: '#111827',
+  },
+  todayText: {
+    fontSize: 10,
+    color: '#9ca3af',
+    marginTop: 2,
+    fontFamily: 'AliRegular',
+  },
+});