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

app/notification-settings.tsx

@@ -1,5 +1,6 @@
 import { ThemedText } from '@/components/ThemedText';
 import { useAuthGuard } from '@/hooks/useAuthGuard';
+import { useI18n } from '@/hooks/useI18n';
 import { useNotifications } from '@/hooks/useNotifications';
 import {
   getMedicationReminderEnabled,
@@ -18,6 +19,7 @@ import { useSafeAreaInsets } from 'react-native-safe-area-context';
 export default function NotificationSettingsScreen() {
   const insets = useSafeAreaInsets();
   const { pushIfAuthedElseLogin } = useAuthGuard();
+  const { t } = useI18n();
   const { requestPermission, sendNotification } = useNotifications();
   const isLgAvailable = isLiquidGlassAvailable();
 
@@ -36,7 +38,7 @@ export default function NotificationSettingsScreen() {
       setNotificationEnabledState(notification);
       setMedicationReminderEnabledState(medicationReminder);
     } catch (error) {
-      console.error('加载通知设置失败:', error);
+      console.error('Failed to load notification settings:', error);
     } finally {
       setIsLoading(false);
     }
@@ -62,25 +64,25 @@ export default function NotificationSettingsScreen() {
 
           // 发送测试通知
           await sendNotification({
-            title: '通知已开启',
-            body: '您将收到应用通知和提醒',
+            title: t('notificationSettings.alerts.notificationsEnabled.title'),
+            body: t('notificationSettings.alerts.notificationsEnabled.body'),
             sound: true,
             priority: 'normal',
           });
         } else {
           // 系统权限被拒绝，不更新用户偏好设置
           Alert.alert(
-            '权限被拒绝',
-            '请在系统设置中开启通知权限，然后再尝试开启推送功能',
+            t('notificationSettings.alerts.permissionDenied.title'),
+            t('notificationSettings.alerts.permissionDenied.message'),
             [
-              { text: '取消', style: 'cancel' },
-              { text: '去设置', onPress: () => Linking.openSettings() }
+              { text: t('notificationSettings.alerts.permissionDenied.cancel'), style: 'cancel' },
+              { text: t('notificationSettings.alerts.permissionDenied.goToSettings'), onPress: () => Linking.openSettings() }
             ]
           );
         }
       } catch (error) {
-        console.error('开启推送通知失败:', error);
-        Alert.alert('错误', '请求通知权限失败');
+        console.error('Failed to enable push notifications:', error);
+        Alert.alert(t('notificationSettings.alerts.error.title'), t('notificationSettings.alerts.error.message'));
       }
     } else {
       try {
@@ -91,8 +93,8 @@ export default function NotificationSettingsScreen() {
         await setMedicationReminderEnabled(false);
         setMedicationReminderEnabledState(false);
       } catch (error) {
-        console.error('关闭推送通知失败:', error);
-        Alert.alert('错误', '保存设置失败');
+        console.error('Failed to disable push notifications:', error);
+        Alert.alert(t('notificationSettings.alerts.error.title'), t('notificationSettings.alerts.error.saveFailed'));
       }
     }
   };
@@ -106,15 +108,15 @@ export default function NotificationSettingsScreen() {
       if (value) {
         // 发送测试通知
         await sendNotification({
-          title: '药品提醒已开启',
-          body: '您将在用药时间收到提醒通知',
+          title: t('notificationSettings.alerts.medicationReminderEnabled.title'),
+          body: t('notificationSettings.alerts.medicationReminderEnabled.body'),
           sound: true,
           priority: 'high',
         });
       }
     } catch (error) {
-      console.error('设置药品提醒失败:', error);
-      Alert.alert('错误', '保存设置失败');
+      console.error('Failed to set medication reminder:', error);
+      Alert.alert(t('notificationSettings.alerts.error.title'), t('notificationSettings.alerts.error.medicationReminderFailed'));
     }
   };
 
@@ -183,7 +185,7 @@ export default function NotificationSettingsScreen() {
           end={{ x: 0, y: 1 }}
         />
         <View style={styles.loadingContainer}>
-          <Text style={styles.loadingText}>加载中...</Text>
+          <Text style={styles.loadingText}>{t('notificationSettings.loading')}</Text>
         </View>
       </View>
     );
@@ -217,16 +219,16 @@ export default function NotificationSettingsScreen() {
         {/* 头部 */}
         <View style={styles.header}>
           <BackButton />
-          <ThemedText style={styles.title}>通知设置</ThemedText>
+          <ThemedText style={styles.title}>{t('notificationSettings.title')}</ThemedText>
         </View>
 
         {/* 通知设置部分 */}
         <View style={styles.section}>
-          <Text style={styles.sectionTitle}>通知设置</Text>
+          <Text style={styles.sectionTitle}>{t('notificationSettings.sections.notifications')}</Text>
           <View style={styles.card}>
             <SwitchItem
-              title="消息推送"
-              description="开启后将接收应用通知"
+              title={t('notificationSettings.items.pushNotifications.title')}
+              description={t('notificationSettings.items.pushNotifications.description')}
               value={notificationEnabled}
               onValueChange={handleNotificationToggle}
             />
@@ -235,11 +237,11 @@ export default function NotificationSettingsScreen() {
 
         {/* 药品提醒部分 */}
         <View style={styles.section}>
-          <Text style={styles.sectionTitle}>药品提醒</Text>
+          <Text style={styles.sectionTitle}>{t('notificationSettings.sections.medicationReminder')}</Text>
           <View style={styles.card}>
             <SwitchItem
-              title="药品通知提醒"
-              description="在用药时间接收提醒通知"
+              title={t('notificationSettings.items.medicationReminder.title')}
+              description={t('notificationSettings.items.medicationReminder.description')}
               value={medicationReminderEnabled}
               onValueChange={handleMedicationReminderToggle}
               disabled={!notificationEnabled}
@@ -249,13 +251,10 @@ export default function NotificationSettingsScreen() {
 
         {/* 说明部分 */}
         <View style={styles.section}>
-          <Text style={styles.sectionTitle}>说明</Text>
+          <Text style={styles.sectionTitle}>{t('notificationSettings.sections.description')}</Text>
           <View style={styles.card}>
             <Text style={styles.description}>
-              • 消息推送是所有通知的总开关{'\n'}
-              • 药品通知提醒需要在消息推送开启后才能使用{'\n'}
-              • 您可以在系统设置中管理通知权限{'\n'}
-              • 关闭消息推送将停止所有应用通知
+              {t('notificationSettings.description.text')}
             </Text>
           </View>
         </View>