feat(i18n): 增强生理周期模块的国际化支持，添加多语言格式和翻译

components/menstrual-cycle/DayCell.tsx

@@ -1,10 +1,12 @@
 import { Colors } from '@/constants/Colors';
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 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 { t } = useTranslation();
   const status = cell.info?.status;
   const colors = status ? STATUS_COLORS[status] : undefined;
 
@@ -32,7 +34,7 @@ export const DayCell: React.FC<DayCellProps> = ({ cell, isSelected, onPress }) =
           {cell.label}
         </Text>
       </View>
-      {cell.isToday && <Text style={styles.todayText}>今天</Text>}
+      {cell.isToday && <Text style={styles.todayText}>{t('menstrual.today')}</Text>}
     </TouchableOpacity>
   );
 };

components/menstrual-cycle/InlineTip.tsx

@@ -1,7 +1,10 @@
 import { Colors } from '@/constants/Colors';
 import { Ionicons } from '@expo/vector-icons';
 import dayjs from 'dayjs';
+import 'dayjs/locale/en';
+import 'dayjs/locale/zh-cn';
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 import { DimensionValue, StyleSheet, Text, TouchableOpacity, View } from 'react-native';
 import { InlineTipProps } from './types';
 
@@ -12,9 +15,12 @@ export const InlineTip: React.FC<InlineTipProps> = ({
   onMarkStart,
   onCancelMark,
 }) => {
+  const { t, i18n } = useTranslation();
   // 14.28% per cell. Center is 7.14%.
   const pointerLeft = `${columnIndex * 14.2857 + 7.1428}%` as DimensionValue;
   const isFuture = selectedDate.isAfter(dayjs(), 'day');
+  const localeKey = i18n.language.startsWith('en') ? 'en' : 'zh-cn';
+  const dateFormat = t('menstrual.dateFormatShort', { defaultValue: 'M月D日' });
 
   return (
     <View style={styles.inlineTipCard}>
@@ -22,17 +28,19 @@ export const InlineTip: React.FC<InlineTipProps> = ({
       <View style={styles.inlineTipRow}>
         <View style={styles.inlineTipDate}>
           <Ionicons name="calendar-outline" size={16} color="#111827" />
-          <Text style={styles.inlineTipDateText}>{selectedDate.format('M月D日')}</Text>
+          <Text style={styles.inlineTipDateText}>
+            {selectedDate.locale(localeKey).format(dateFormat)}
+          </Text>
         </View>
         {!isFuture && (!selectedInfo || !selectedInfo.confirmed) && (
           <TouchableOpacity style={styles.inlinePrimaryBtn} onPress={onMarkStart}>
             <Ionicons name="add" size={14} color="#fff" />
-            <Text style={styles.inlinePrimaryText}>标记经期</Text>
+            <Text style={styles.inlinePrimaryText}>{t('menstrual.actions.markPeriod')}</Text>
           </TouchableOpacity>
         )}
         {!isFuture && selectedInfo?.confirmed && selectedInfo.status === 'period' && (
           <TouchableOpacity style={styles.inlineSecondaryBtn} onPress={onCancelMark}>
-            <Text style={styles.inlineSecondaryText}>取消标记</Text>
+            <Text style={styles.inlineSecondaryText}>{t('menstrual.actions.cancelMark')}</Text>
           </TouchableOpacity>
         )}
       </View>

components/menstrual-cycle/Legend.tsx

@@ -1,19 +1,21 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 import { StyleSheet, Text, View } from 'react-native';
 import { STATUS_COLORS } from './constants';
 import { LegendItem } from './types';
 
-const LEGEND_ITEMS: LegendItem[] = [
-  { label: '经期', key: 'period' },
-  { label: '预测经期', key: 'predicted-period' },
-  { label: '排卵期', key: 'fertile' },
-  { label: '排卵日', key: 'ovulation-day' },
-];
-
 export const Legend: React.FC = () => {
+  const { t } = useTranslation();
+  const legendItems: LegendItem[] = [
+    { label: t('menstrual.legend.period'), key: 'period' },
+    { label: t('menstrual.legend.predictedPeriod'), key: 'predicted-period' },
+    { label: t('menstrual.legend.fertile'), key: 'fertile' },
+    { label: t('menstrual.legend.ovulation'), key: 'ovulation-day' },
+  ];
+
   return (
     <View style={styles.legendRow}>
-      {LEGEND_ITEMS.map((item) => (
+      {legendItems.map((item) => (
         <View key={item.key} style={styles.legendItem}>
           <View
             style={[

components/menstrual-cycle/MonthBlock.tsx

@@ -17,6 +17,7 @@ interface MonthBlockProps {
   selectedDateKey: string;
   onSelect: (dateKey: string) => void;
   renderTip: (colIndex: number) => React.ReactNode;
+  weekLabels?: string[];
 }
 
 export const MonthBlock: React.FC<MonthBlockProps> = ({
@@ -24,8 +25,10 @@ export const MonthBlock: React.FC<MonthBlockProps> = ({
   selectedDateKey,
   onSelect,
   renderTip,
+  weekLabels,
 }) => {
   const weeks = useMemo(() => chunkArray(month.cells, 7), [month.cells]);
+  const labels = weekLabels?.length === 7 ? weekLabels : WEEK_LABELS;
 
   return (
     <View style={styles.monthCard}>
@@ -34,7 +37,7 @@ export const MonthBlock: React.FC<MonthBlockProps> = ({
         <Text style={styles.monthSubtitle}>{month.subtitle}</Text>
       </View>
       <View style={styles.weekRow}>
-        {WEEK_LABELS.map((label) => (
+        {labels.map((label) => (
           <Text key={label} style={styles.weekLabel}>
             {label}
           </Text>