feat: 添加教练功能和更新用户界面

- 新增教练页面，用户可以与教练进行互动和咨询
- 更新首页，切换到教练 tab 并传递名称参数
- 优化个人信息页面，添加注销帐号和退出登录功能
- 更新隐私政策和用户协议的链接，确保用户在使用前同意相关条款
- 修改今日训练页面标题为“开始训练”，提升用户体验
- 删除不再使用的进度条组件，简化代码结构

app/(tabs)/personal.tsx

@@ -1,23 +1,23 @@
+import { PRIVACY_POLICY_URL, USER_AGREEMENT_URL } from '@/constants/Agree';
 import { Colors } from '@/constants/Colors';
 import { getTabBarBottomPadding } from '@/constants/TabBar';
 import { useAppDispatch, useAppSelector } from '@/hooks/redux';
+import { useAuthGuard } from '@/hooks/useAuthGuard';
 import { useColorScheme } from '@/hooks/useColorScheme';
-import { api } from '@/services/api';
-import { DEFAULT_MEMBER_NAME, fetchMyProfile, logout } from '@/store/userSlice';
+import { DEFAULT_MEMBER_NAME, fetchMyProfile } from '@/store/userSlice';
 import { Ionicons } from '@expo/vector-icons';
 import AsyncStorage from '@react-native-async-storage/async-storage';
 import { useBottomTabBarHeight } from '@react-navigation/bottom-tabs';
 import { useFocusEffect } from '@react-navigation/native';
-import type { Href } from 'expo-router';
-import { router } from 'expo-router';
 import React, { useMemo, useState } from 'react';
-import { Alert, Image, SafeAreaView, ScrollView, StatusBar, StyleSheet, Switch, Text, TouchableOpacity, View } from 'react-native';
+import { Alert, Image, Linking, SafeAreaView, ScrollView, StatusBar, StyleSheet, Switch, Text, TouchableOpacity, View } from 'react-native';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
 
 const DEFAULT_AVATAR_URL = 'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/avatar/avatarGirl01.jpeg';
 
 export default function PersonalScreen() {
   const dispatch = useAppDispatch();
+  const { confirmLogout, confirmDeleteAccount, isLoggedIn, pushIfAuthedElseLogin } = useAuthGuard();
   const insets = useSafeAreaInsets();
   const tabBarHeight = useBottomTabBarHeight();
   const colorScheme = useColorScheme();
@@ -95,32 +95,7 @@ export default function PersonalScreen() {
 
 
 
-  const handleDeleteAccount = () => {
-    Alert.alert(
-      '确认注销帐号',
-      '此操作不可恢复，将删除您的帐号及相关数据。确定继续吗？',
-      [
-        { text: '取消', style: 'cancel' },
-        {
-          text: '确认注销',
-          style: 'destructive',
-          onPress: async () => {
-            try {
-              await api.delete('/api/users/delete-account');
-              await AsyncStorage.multiRemove(['@user_personal_info']);
-              await dispatch(logout()).unwrap();
-              Alert.alert('帐号已注销', '您的帐号已成功注销');
-              router.replace('/auth/login');
-            } catch (err: any) {
-              const message = err?.message || '注销失败，请稍后重试';
-              Alert.alert('注销失败', message);
-            }
-          },
-        },
-      ],
-      { cancelable: true }
-    );
-  };
+
 
   const UserInfoSection = () => (
     <View style={[styles.userInfoCard, { backgroundColor: colorTokens.card }]}>
@@ -138,7 +113,7 @@ export default function PersonalScreen() {
         </View>
 
         {/* 编辑按钮 */}
-        <TouchableOpacity style={dynamicStyles.editButton} onPress={() => router.push('/profile/edit')}>
+        <TouchableOpacity style={dynamicStyles.editButton} onPress={() => pushIfAuthedElseLogin('/profile/edit')}>
           <Text style={dynamicStyles.editButtonText}>编辑</Text>
         </TouchableOpacity>
       </View>
@@ -170,7 +145,8 @@ export default function PersonalScreen() {
         <TouchableOpacity
           key={index}
           style={styles.menuItem}
-          onPress={item.onPress}
+          onPress={item.type === 'switch' ? undefined : item.onPress}
+          disabled={item.type === 'switch'}
         >
           <View style={styles.menuItemLeft}>
             <View style={[
@@ -187,8 +163,14 @@ export default function PersonalScreen() {
           </View>
           {item.type === 'switch' ? (
             <Switch
-              value={notificationEnabled}
-              onValueChange={setNotificationEnabled}
+              value={isLoggedIn ? notificationEnabled : false}
+              onValueChange={(value) => {
+                if (!isLoggedIn) {
+                  pushIfAuthedElseLogin('/profile/notification-settings');
+                  return;
+                }
+                setNotificationEnabled(value);
+              }}
               trackColor={{ false: '#E5E5E5', true: colors.primary }}
               thumbColor="#FFFFFF"
               style={styles.switch}
@@ -243,12 +225,20 @@ export default function PersonalScreen() {
         {
           icon: 'flag-outline' as const,
           title: '目标管理',
-          onPress: () => router.push('/profile/goals' as Href),
-        },
-        {
-          icon: 'stats-chart-outline' as const,
-          title: '训练进度',
+          onPress: () => pushIfAuthedElseLogin('/profile/goals'),
         },
+        // {
+        //   icon: 'stats-chart-outline' as const,
+        //   title: '训练进度',
+        //   onPress: () => {
+        //     // 训练进度页面暂未实现，先显示提示
+        //     if (isLoggedIn) {
+        //       Alert.alert('提示', '训练进度功能正在开发中');
+        //     } else {
+        //       pushIfAuthedElseLogin('/profile/training-progress');
+        //     }
+        //   },
+        // },
       ],
     },
     {
@@ -264,42 +254,36 @@ export default function PersonalScreen() {
     {
       title: '其他',
       items: [
-        {
-          icon: 'mail-outline' as const,
-          title: '联系我们',
-        },
         {
           icon: 'shield-checkmark-outline' as const,
           title: '隐私政策',
+          onPress: () => Linking.openURL(PRIVACY_POLICY_URL),
         },
         {
-          icon: 'settings-outline' as const,
-          title: '设置',
+          icon: 'document-text-outline' as const,
+          title: '用户协议',
+          onPress: () => Linking.openURL(USER_AGREEMENT_URL),
         },
       ],
     },
-    {
+    // 只有登录用户才显示账号与安全菜单
+    ...(isLoggedIn ? [{
       title: '账号与安全',
       items: [
+        {
+          icon: 'log-out-outline' as const,
+          title: '退出登录',
+          onPress: confirmLogout,
+          isDanger: false,
+        },
         {
           icon: 'trash-outline' as const,
           title: '注销帐号',
-          onPress: handleDeleteAccount,
+          onPress: confirmDeleteAccount,
           isDanger: true,
         },
       ],
-    },
-    {
-      title: '开发者',
-      items: [
-        {
-          icon: 'refresh-outline' as const,
-          title: '重置引导流程',
-          onPress: handleResetOnboarding,
-          isDanger: true,
-        },
-      ],
-    },
+    }] : []),
   ];
 
   return (
@@ -317,12 +301,6 @@ export default function PersonalScreen() {
             <MenuSection key={index} title={section.title} items={section.items} />
           ))}
 
-          {/* 底部浮动按钮 */}
-          <View style={[styles.floatingButtonContainer, { bottom: Math.max(30, tabBarHeight / 2) + (insets?.bottom ?? 0) }]}>
-            <TouchableOpacity style={dynamicStyles.floatingButton}>
-              <Ionicons name="search" size={24} color="#192126" />
-            </TouchableOpacity>
-          </View>
         </ScrollView>
       </SafeAreaView>
     </View>
@@ -430,6 +408,7 @@ const styles = StyleSheet.create({
   menuItemText: {
     fontSize: 16,
     flex: 1,
+    fontWeight: '600',
   },
   switch: {
     transform: [{ scaleX: 0.8 }, { scaleY: 0.8 }],