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/CircumferenceCard.tsx

@@ -4,6 +4,7 @@ import { useAuthGuard } from '@/hooks/useAuthGuard';
 import { selectUserProfile, updateUserBodyMeasurements, UserProfile } from '@/store/userSlice';
 import { router } from 'expo-router';
 import React, { useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { StyleSheet, Text, TouchableOpacity, View } from 'react-native';
 
 interface CircumferenceCardProps {
@@ -11,6 +12,7 @@ interface CircumferenceCardProps {
 }
 
 const CircumferenceCard: React.FC<CircumferenceCardProps> = ({ style }) => {
+  const { t } = useTranslation();
   const dispatch = useAppDispatch();
   const userProfile = useAppSelector(selectUserProfile);
 
@@ -30,32 +32,32 @@ const CircumferenceCard: React.FC<CircumferenceCardProps> = ({ style }) => {
   const measurements = [
     {
       key: 'chestCircumference',
-      label: '胸围',
+      label: t('statistics.components.circumference.measurements.chest'),
       value: userProfile?.chestCircumference,
     },
     {
       key: 'waistCircumference',
-      label: '腰围',
+      label: t('statistics.components.circumference.measurements.waist'),
       value: userProfile?.waistCircumference,
     },
     {
       key: 'upperHipCircumference',
-      label: '上臀围',
+      label: t('statistics.components.circumference.measurements.hip'),
       value: userProfile?.upperHipCircumference,
     },
     {
       key: 'armCircumference',
-      label: '臂围',
+      label: t('statistics.components.circumference.measurements.arm'),
       value: userProfile?.armCircumference,
     },
     {
       key: 'thighCircumference',
-      label: '大腿围',
+      label: t('statistics.components.circumference.measurements.thigh'),
       value: userProfile?.thighCircumference,
     },
     {
       key: 'calfCircumference',
-      label: '小腿围',
+      label: t('statistics.components.circumference.measurements.calf'),
       value: userProfile?.calfCircumference,
     },
   ];
@@ -145,7 +147,7 @@ const CircumferenceCard: React.FC<CircumferenceCardProps> = ({ style }) => {
       onPress={handleCardPress}
       activeOpacity={0.8}
     >
-      <Text style={styles.title}>围度 (cm)</Text>
+      <Text style={styles.title}>{t('statistics.components.circumference.title')}</Text>
 
       <View style={styles.measurementsContainer}>
         {measurements.map((measurement, index) => (
@@ -174,12 +176,12 @@ const CircumferenceCard: React.FC<CircumferenceCardProps> = ({ style }) => {
           setModalVisible(false);
           setSelectedMeasurement(null);
         }}
-        title={selectedMeasurement ? `设置${selectedMeasurement.label}` : '设置围度'}
+        title={selectedMeasurement ? t('statistics.components.circumference.setTitle', { label: selectedMeasurement.label }) : t('statistics.components.circumference.title')}
         items={circumferenceOptions}
         selectedValue={selectedMeasurement?.currentValue}
         onValueChange={() => { }} // Real-time update not needed
         onConfirm={handleUpdateMeasurement}
-        confirmButtonText="确认"
+        confirmButtonText={t('statistics.components.circumference.confirm')}
         pickerHeight={180}
       />
     </TouchableOpacity>