feat(i18n): 实现应用国际化支持，添加中英文翻译

- 为所有UI组件添加国际化支持，替换硬编码文本
- 新增useI18n钩子函数统一管理翻译
- 完善中英文翻译资源，覆盖统计、用药、通知设置等模块
- 优化Tab布局使用翻译键值替代静态文本
- 更新药品管理、个人资料编辑等页面的多语言支持

components/statistic/OxygenSaturationCard.tsx

@@ -1,8 +1,9 @@
-import React, { useState, useCallback, useRef } from 'react';
-import { useFocusEffect } from '@react-navigation/native';
-import HealthDataCard from './HealthDataCard';
 import { fetchOxygenSaturation } from '@/utils/health';
+import { useFocusEffect } from '@react-navigation/native';
 import dayjs from 'dayjs';
+import React, { useCallback, useRef, useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import HealthDataCard from './HealthDataCard';
 
 interface OxygenSaturationCardProps {
   style?: object;
@@ -13,6 +14,7 @@ const OxygenSaturationCard: React.FC<OxygenSaturationCardProps> = ({
   style,
   selectedDate
 }) => {
+  const { t } = useTranslation();
   const [oxygenSaturation, setOxygenSaturation] = useState<number | null>(null);
   const [loading, setLoading] = useState(false);
   const loadingRef = useRef(false);
@@ -38,7 +40,7 @@ const OxygenSaturationCard: React.FC<OxygenSaturationCardProps> = ({
           const data = await fetchOxygenSaturation(options);
           setOxygenSaturation(data);
         } catch (error) {
-          console.error('OxygenSaturationCard: 获取血氧饱和度数据失败:', error);
+          console.error('OxygenSaturationCard: Failed to get blood oxygen data:', error);
           setOxygenSaturation(null);
         } finally {
           setLoading(false);
@@ -52,7 +54,7 @@ const OxygenSaturationCard: React.FC<OxygenSaturationCardProps> = ({
 
   return (
     <HealthDataCard
-      title="血氧饱和度"
+      title={t('statistics.components.oxygen.title')}
       value={loading ? '--' : (oxygenSaturation !== null && oxygenSaturation !== undefined ? oxygenSaturation.toFixed(1) : '--')}
       unit="%"
       style={style}