feat(i18n): 全面实现应用核心功能模块的国际化支持

- 新增 i18n 翻译资源，覆盖睡眠、饮水、体重、锻炼、用药 AI 识别、步数、健身圆环、基础代谢及设置等核心模块
- 重构相关页面及组件（如 SleepDetail, WaterDetail, WorkoutHistory 等）使用 `useI18n` 钩子替换硬编码文本
- 升级 `utils/date` 工具库与 `DateSelector` 组件，支持基于语言环境的日期格式化与显示
- 完善登录页、注销流程及权限申请弹窗的双语提示信息
- 优化部分页面的 UI 细节与字体样式以适配多语言显示

components/DateSelector.tsx

@@ -1,4 +1,5 @@
-import { getMonthDaysZh, getMonthTitleZh, getTodayIndexInMonth } from '@/utils/date';
+import { useI18n } from '@/hooks/useI18n';
+import { getMonthDays, getMonthTitle, getTodayIndexInMonth } from '@/utils/date';
 import { Ionicons } from '@expo/vector-icons';
 import DateTimePicker from '@react-native-community/datetimepicker';
 import dayjs from 'dayjs';
@@ -50,6 +51,8 @@ export const DateSelector: React.FC<DateSelectorProps> = ({
   autoScrollToSelected = true,
   showCalendarIcon = true,
 }) => {
+  const { t, i18n } = useI18n();
+  
   // 内部状态管理
   const [internalSelectedIndex, setInternalSelectedIndex] = useState(getTodayIndexInMonth());
   const [currentMonth, setCurrentMonth] = useState(dayjs()); // 当前显示的月份
@@ -59,8 +62,8 @@ export const DateSelector: React.FC<DateSelectorProps> = ({
   const isGlassAvailable = isLiquidGlassAvailable();
 
   // 获取日期数据
-  const days = getMonthDaysZh(currentMonth);
-  const monthTitle = externalMonthTitle ?? getMonthTitleZh(currentMonth);
+  const days = getMonthDays(currentMonth, i18n.language as 'zh' | 'en');
+  const monthTitle = externalMonthTitle ?? getMonthTitle(currentMonth, i18n.language as 'zh' | 'en');
 
   // 判断当前选中的日期是否是今天
   const isSelectedDateToday = () => {
@@ -201,7 +204,7 @@ export const DateSelector: React.FC<DateSelectorProps> = ({
     setCurrentMonth(selectedMonth);
 
     // 计算选中日期在新月份中的索引
-    const newMonthDays = getMonthDaysZh(selectedMonth);
+    const newMonthDays = getMonthDays(selectedMonth, i18n.language as 'zh' | 'en');
     const selectedDay = selectedMonth.date();
     const newSelectedIndex = newMonthDays.findIndex(day => day.dayOfMonth === selectedDay);
 
@@ -219,7 +222,7 @@ export const DateSelector: React.FC<DateSelectorProps> = ({
   const handleGoToday = () => {
     const today = dayjs();
     setCurrentMonth(today);
-    const todayDays = getMonthDaysZh(today);
+    const todayDays = getMonthDays(today, i18n.language as 'zh' | 'en');
     const newSelectedIndex = todayDays.findIndex(day => day.dayOfMonth === today.date());
 
     if (newSelectedIndex !== -1) {
@@ -250,11 +253,11 @@ export const DateSelector: React.FC<DateSelectorProps> = ({
                     tintColor="rgba(124, 58, 237, 0.08)"
                     isInteractive={true}
                   >
-                    <Text style={styles.todayButtonText}>回到今天</Text>
+                    <Text style={styles.todayButtonText}>{t('dateSelector.backToToday')}</Text>
                   </GlassView>
                 ) : (
                   <View style={[styles.todayButton, styles.todayButtonFallback]}>
-                    <Text style={styles.todayButtonText}>回到今天</Text>
+                    <Text style={styles.todayButtonText}>{t('dateSelector.backToToday')}</Text>
                   </View>
                 )}
               </TouchableOpacity>
@@ -379,7 +382,7 @@ export const DateSelector: React.FC<DateSelectorProps> = ({
               display={Platform.OS === 'ios' ? 'inline' : 'calendar'}
               minimumDate={dayjs().subtract(6, 'month').toDate()}
               maximumDate={disableFutureDates ? new Date() : undefined}
-              {...(Platform.OS === 'ios' ? { locale: 'zh-CN' } : {})}
+              {...(Platform.OS === 'ios' ? { locale: i18n.language === 'zh' ? 'zh-CN' : 'en-US' } : {})}
               onChange={(event, date) => {
                 if (Platform.OS === 'ios') {
                   if (date) setPickerDate(date);
@@ -395,12 +398,12 @@ export const DateSelector: React.FC<DateSelectorProps> = ({
             {Platform.OS === 'ios' && (
               <View style={styles.modalActions}>
                 <TouchableOpacity onPress={closeDatePicker} style={[styles.modalBtn]}>
-                  <Text style={styles.modalBtnText}>取消</Text>
+                  <Text style={styles.modalBtnText}>{t('dateSelector.cancel')}</Text>
                 </TouchableOpacity>
                 <TouchableOpacity onPress={() => {
                   onConfirmDate(pickerDate);
                 }} style={[styles.modalBtn, styles.modalBtnPrimary]}>
-                  <Text style={[styles.modalBtnText, styles.modalBtnTextPrimary]}>确定</Text>
+                  <Text style={[styles.modalBtnText, styles.modalBtnTextPrimary]}>{t('dateSelector.confirm')}</Text>
                 </TouchableOpacity>
               </View>
             )}
@@ -413,7 +416,7 @@ export const DateSelector: React.FC<DateSelectorProps> = ({
               display={Platform.OS === 'ios' ? 'inline' : 'calendar'}
               minimumDate={dayjs().subtract(6, 'month').toDate()}
               maximumDate={disableFutureDates ? new Date() : undefined}
-              {...(Platform.OS === 'ios' ? { locale: 'zh-CN' } : {})}
+              {...(Platform.OS === 'ios' ? { locale: i18n.language === 'zh' ? 'zh-CN' : 'en-US' } : {})}
               onChange={(event, date) => {
                 if (Platform.OS === 'ios') {
                   if (date) setPickerDate(date);
@@ -429,12 +432,12 @@ export const DateSelector: React.FC<DateSelectorProps> = ({
             {Platform.OS === 'ios' && (
               <View style={styles.modalActions}>
                 <TouchableOpacity onPress={closeDatePicker} style={[styles.modalBtn]}>
-                  <Text style={styles.modalBtnText}>取消</Text>
+                  <Text style={styles.modalBtnText}>{t('dateSelector.cancel')}</Text>
                 </TouchableOpacity>
                 <TouchableOpacity onPress={() => {
                   onConfirmDate(pickerDate);
                 }} style={[styles.modalBtn, styles.modalBtnPrimary]}>
-                  <Text style={[styles.modalBtnText, styles.modalBtnTextPrimary]}>确定</Text>
+                  <Text style={[styles.modalBtnText, styles.modalBtnTextPrimary]}>{t('dateSelector.confirm')}</Text>
                 </TouchableOpacity>
               </View>
             )}