feat: 引入路由常量并更新相关页面导航

- 新增 ROUTES 常量文件，集中管理应用路由
- 更新多个页面的导航逻辑，使用 ROUTES 常量替代硬编码路径
- 修改教练页面和今日训练页面的路由，提升代码可维护性
- 优化标签页和登录页面的导航，确保一致性和易用性

app/(tabs)/_layout.tsx

@@ -7,6 +7,7 @@ import { IconSymbol } from '@/components/ui/IconSymbol';
 import { Colors } from '@/constants/Colors';
 import { TAB_BAR_BOTTOM_OFFSET, TAB_BAR_HEIGHT } from '@/constants/TabBar';
 import { useColorScheme } from '@/hooks/useColorScheme';
+import { ROUTES } from '@/constants/Routes';
 
 export default function TabLayout() {
   const theme = (useColorScheme() ?? 'light') as 'light' | 'dark';
@@ -17,9 +18,9 @@ export default function TabLayout() {
     <Tabs
       screenOptions={({ route }) => {
         const routeName = route.name;
-        const isSelected = (routeName === 'index' && pathname === '/') ||
+        const isSelected = (routeName === 'index' && pathname === ROUTES.TAB_HOME) ||
-          (routeName === 'coach' && pathname === '/coach') ||
+          (routeName === 'coach' && pathname === ROUTES.TAB_COACH) ||
-          (routeName === 'statistics' && pathname === '/statistics') ||
+          (routeName === 'statistics' && pathname === ROUTES.TAB_STATISTICS) ||
           pathname.includes(routeName);
 
         return {
@@ -39,7 +40,7 @@ export default function TabLayout() {
             const getIconAndTitle = () => {
               switch (routeName) {
                 case 'index':
-                  return { icon: 'house.fill', title: '首页' } as const;
+                  return { icon: 'magnifyingglass.circle.fill', title: '发现' } as const;
                 case 'coach':
                   return { icon: 'person.3.fill', title: 'Bot' } as const;
                 case 'statistics':
@@ -157,12 +158,12 @@ export default function TabLayout() {
       <Tabs.Screen
         name="index"
         options={{
-          title: '首页',
+          title: '发现',
           tabBarIcon: ({ color }) => {
             const isHomeSelected = pathname === '/' || pathname === '/index';
             return (
               <View style={{ flexDirection: 'row', alignItems: 'center' }}>
-                <IconSymbol size={22} name="house.fill" color={color} />
+                <IconSymbol size={22} name="magnifyingglass.circle.fill" color={color} />
                 {isHomeSelected && (
                   <Text
                     numberOfLines={1}
@@ -174,7 +175,7 @@ export default function TabLayout() {
                       textAlign: 'center',
                       flexShrink: 0,
                     }}>
-                    首页
+                    发现
                   </Text>
                 )}
               </View>

app/(tabs)/coach.tsx

@@ -24,16 +24,14 @@ import { useSafeAreaInsets } from 'react-native-safe-area-context';
 
 import { Colors } from '@/constants/Colors';
 import { getTabBarBottomPadding } from '@/constants/TabBar';
-import { useAppDispatch, useAppSelector } from '@/hooks/redux';
+import { useAppSelector } from '@/hooks/redux';
 import { useAuthGuard } from '@/hooks/useAuthGuard';
 import { useCosUpload } from '@/hooks/useCosUpload';
 import { deleteConversation, getConversationDetail, listConversations, type AiConversationListItem } from '@/services/aiCoach';
 import { loadAiCoachSessionCache, saveAiCoachSessionCache } from '@/services/aiCoachSession';
 import { api, getAuthToken, postTextStream } from '@/services/api';
-import { updateUser as updateUserApi } from '@/services/users';
-import type { CheckinRecord } from '@/store/checkinSlice';
-import { fetchMyProfile, fetchWeightHistory, updateProfile } from '@/store/userSlice';
 import dayjs from 'dayjs';
+import { ActionSheet } from '../../components/ui/ActionSheet';
 
 type Role = 'user' | 'assistant';
 
@@ -43,6 +41,15 @@ type ChatMessage = {
   content: string;
 };
 
+// 卡片类型常量定义
+const CardType = {
+  WEIGHT_INPUT: '__WEIGHT_INPUT_CARD__',
+  DIET_INPUT: '__DIET_INPUT_CARD__',
+  DIET_TEXT_INPUT: '__DIET_TEXT_INPUT__',
+} as const;
+
+type CardType = typeof CardType[keyof typeof CardType];
+
 const COACH_AVATAR = require('@/assets/images/logo.png');
 
 export default function CoachScreen() {
@@ -84,10 +91,13 @@ export default function CoachScreen() {
   }>>([]);
   const [previewImageUri, setPreviewImageUri] = useState<string | null>(null);
   const [dietTextInputs, setDietTextInputs] = useState<Record<string, string>>({});
+  const [weightInputs, setWeightInputs] = useState<Record<string, string>>({});
+  const [showDietPhotoActionSheet, setShowDietPhotoActionSheet] = useState(false);
+  const [currentCardId, setCurrentCardId] = useState<string | null>(null);
 
   const planDraft = useAppSelector((s) => s.trainingPlan?.draft);
   const checkin = useAppSelector((s) => s.checkin || {});
-  const dispatch = useAppDispatch();
+
   const userProfile = useAppSelector((s) => s.user?.profile);
   const { upload } = useCosUpload();
 
@@ -199,8 +209,8 @@ export default function CoachScreen() {
     // { key: 'posture', label: '体态评估', action: () => router.push('/ai-posture-assessment') },
     // { key: 'plan', label: 'AI制定训练计划', action: () => handleQuickPlan() },
     // { key: 'analyze', label: '分析运动记录', action: () => handleAnalyzeRecords() },
-    { key: 'weight', label: '记体重', action: () => insertWeightInputCard() },
+    { key: 'weight', label: '#记体重', action: () => insertWeightInputCard() },
-    { key: 'diet', label: '记饮食', action: () => insertDietInputCard() },
+    { key: 'diet', label: '#记饮食', action: () => insertDietInputCard() },
   ], [router, planDraft, checkin]);
 
   const scrollToEnd = useCallback(() => {
@@ -424,6 +434,7 @@ export default function CoachScreen() {
     setConversationId(undefined);
     setSelectedImages([]);
     setDietTextInputs({});
+    setWeightInputs({});
 
     // 创建新的欢迎消息
     initializeWelcomeMessage();
@@ -614,88 +625,6 @@ export default function CoachScreen() {
     }
   }
 
-  function handleQuickPlan() {
-    const goalMap: Record<string, string> = {
-      postpartum_recovery: '产后恢复',
-      fat_loss: '减脂塑形',
-      posture_correction: '体态矫正',
-      core_strength: '核心力量',
-      flexibility: '柔韧灵活',
-      rehab: '康复保健',
-      stress_relief: '释压放松',
-    };
-    const goalText = planDraft?.goal ? goalMap[planDraft.goal] : '整体提升';
-    const freq = planDraft?.mode === 'sessionsPerWeek'
-      ? `${planDraft?.sessionsPerWeek ?? 3}次/周`
-      : (planDraft?.daysOfWeek?.length ? `${planDraft.daysOfWeek.length}次/周` : '3次/周');
-    const prefer = planDraft?.preferredTimeOfDay ? `偏好${planDraft.preferredTimeOfDay}` : '时间灵活';
-    const prompt = `请根据我的目标"${goalText}"、频率"${freq}"、${prefer}，制定1周的普拉提训练计划，包含每次训练主题、时长、主要动作与注意事项，并给出恢复建议。`;
-    send(prompt);
-  }
-
-  function buildTrainingSummary(): string {
-    try {
-      const entries = Object.values(checkin?.byDate || {}) as CheckinRecord[];
-      if (!entries.length) return '';
-      
-      const recent = entries
-        .filter(entry => entry && entry.date) // 过滤无效数据
-        .sort((a: any, b: any) => String(b.date).localeCompare(String(a.date)))
-        .slice(0, 14);
-        
-      let totalSessions = 0;
-      let totalExercises = 0;
-      let totalCompleted = 0;
-      const categoryCount: Record<string, number> = {};
-      const exerciseCount: Record<string, number> = {};
-      
-      for (const rec of recent) {
-        if (!rec?.items?.length) continue;
-        totalSessions += 1;
-        for (const it of rec.items) {
-          if (!it || typeof it !== 'object') continue;
-          totalExercises += 1;
-          if (it.completed) totalCompleted += 1;
-          if (it.category) {
-            categoryCount[it.category] = (categoryCount[it.category] || 0) + 1;
-          }
-          if (it.name) {
-            exerciseCount[it.name] = (exerciseCount[it.name] || 0) + 1;
-          }
-        }
-      }
-      
-      const topCategories = Object.entries(categoryCount)
-        .sort((a, b) => b[1] - a[1])
-        .slice(0, 3)
-        .map(([k, v]) => `${k}×${v}`);
-        
-      const topExercises = Object.entries(exerciseCount)
-        .sort((a, b) => b[1] - a[1])
-        .slice(0, 5)
-        .map(([k, v]) => `${k}×${v}`);
-        
-      return [
-        `统计周期：最近${recent.length}天（按有记录日计 ${totalSessions} 天）`,
-        `记录条目：${totalExercises}，完成标记：${totalCompleted}`,
-        topCategories.length ? `高频类别：${topCategories.join('，')}` : '',
-        topExercises.length ? `高频动作：${topExercises.join('，')}` : '',
-      ].filter(Boolean).join('\n');
-    } catch (error) {
-      console.warn('[AI_CHAT] Error building training summary:', error);
-      return '';
-    }
-  }
-
-  function handleAnalyzeRecords() {
-    const summary = buildTrainingSummary();
-    if (!summary) {
-      send('我还没有可分析的打卡记录，请先在"每日打卡"添加并完成一些训练记录，然后帮我分析近期训练表现与改进建议。');
-      return;
-    }
-    const prompt = `请基于以下我的近期训练记录进行分析，输出：1）整体训练负荷与节奏；2）动作与肌群的均衡性（指出偏多/偏少）；3）容易忽视的恢复与热身建议；4）后续一周的优化建议（频次/时长/动作方向）。\n\n${summary}`;
-    send(prompt);
-  }
 
   const uploadImage = useCallback(async (img: any) => {
     if (!img?.localUri || !img?.id) {
@@ -785,9 +714,6 @@ export default function CoachScreen() {
         layout={Layout.springify().damping(18)}
         style={[styles.row, { justifyContent: isUser ? 'flex-end' : 'flex-start' }]}
       >
-        {!isUser && (
-          <Image source={COACH_AVATAR} style={styles.avatar} />
-        )}
         <View
           style={[
             styles.bubble,
@@ -811,7 +737,8 @@ export default function CoachScreen() {
       return <Text style={[styles.bubbleText, { color: '#687076' }]}>正在思考…</Text>;
     }
 
-    if (item.content?.startsWith('__WEIGHT_INPUT_CARD__')) {
+    if (item.content?.startsWith(CardType.WEIGHT_INPUT)) {
+      const cardId = item.id;
       const preset = (() => {
         try {
           const m = item.content.split('\n')?.[1];
@@ -822,6 +749,9 @@ export default function CoachScreen() {
         }
       })();
 
+      // 初始化输入值（如果还没有的话）
+      const currentValue = weightInputs[cardId] ?? preset;
+
       return (
         <View style={{ gap: 8 }}>
           <Text style={[styles.bubbleText, { color: '#192126', fontWeight: '700' }]}>记录今日体重</Text>
@@ -829,10 +759,11 @@ export default function CoachScreen() {
             <TextInput
               placeholder="例如 60.5"
               keyboardType="decimal-pad"
-              defaultValue={preset}
+              value={currentValue}
               placeholderTextColor={'#687076'}
               style={styles.weightInput}
-              onSubmitEditing={(e) => handleSubmitWeight(e.nativeEvent.text)}
+              onChangeText={(text) => setWeightInputs(prev => ({ ...prev, [cardId]: text }))}
+              onSubmitEditing={(e) => handleSubmitWeight(e.nativeEvent.text, cardId)}
               returnKeyType="done"
               submitBehavior="blurAndSubmit"
             />
@@ -840,9 +771,9 @@ export default function CoachScreen() {
             <TouchableOpacity
               accessibilityRole="button"
               style={styles.weightSaveBtn}
-              onPress={() => handleSubmitWeight(preset || '')}
+              onPress={() => handleSubmitWeight(currentValue, cardId)}
             >
-              <Text style={{ color: '#192126', fontWeight: '700' }}>保存</Text>
+              <Text style={{ color: '#192126', fontWeight: '700' }}>记录</Text>
             </TouchableOpacity>
           </View>
           <Text style={{ color: '#687076', fontSize: 12 }}>按回车或点击保存，即可将该体重同步到账户并发送到对话。</Text>
@@ -850,7 +781,7 @@ export default function CoachScreen() {
       );
     }
 
-    if (item.content?.startsWith('__DIET_INPUT_CARD__')) {
+    if (item.content?.startsWith(CardType.DIET_INPUT)) {
       return (
         <View style={{ gap: 12 }}>
           <Text style={[styles.bubbleText, { color: '#192126', fontWeight: '700' }]}>记录今日饮食</Text>
@@ -891,7 +822,7 @@ export default function CoachScreen() {
       );
     }
 
-    if (item.content?.startsWith('__DIET_TEXT_INPUT__')) {
+    if (item.content?.startsWith(CardType.DIET_TEXT_INPUT)) {
       const cardId = item.content.split('\n')?.[1] || '';
       const currentText = dietTextInputs[cardId] || '';
 
@@ -917,7 +848,6 @@ export default function CoachScreen() {
             value={currentText}
             onChangeText={(text) => setDietTextInputs(prev => ({ ...prev, [cardId]: text }))}
             returnKeyType="done"
-            blurOnSubmit={false}
           />
 
           <TouchableOpacity
@@ -944,12 +874,12 @@ export default function CoachScreen() {
   function insertWeightInputCard() {
     const id = `wcard_${Date.now()}`;
     const preset = userProfile?.weight ? Number(userProfile.weight) : undefined;
-    const payload = `__WEIGHT_INPUT_CARD__\n${preset ?? ''}`;
+    const payload = `${CardType.WEIGHT_INPUT}\n${preset ?? ''}`;
     setMessages((prev) => [...prev, { id, role: 'assistant', content: payload }]);
     setTimeout(scrollToEnd, 100);
   }
 
-  async function handleSubmitWeight(text?: string) {
+  async function handleSubmitWeight(text?: string, cardId?: string) {
     const val = parseFloat(String(text ?? '').trim());
     if (isNaN(val) || val <= 0 || val > 500) {
       Alert.alert('请输入有效体重', '请填写合理的公斤数，例如 60.5');
@@ -957,32 +887,19 @@ export default function CoachScreen() {
     }
 
     try {
-      // 本地更新
+      // 清理该卡片的输入状态
-      dispatch(updateProfile({ weight: String(val) }));
+      if (cardId) {
+        setWeightInputs(prev => {
+          const { [cardId]: _, ...rest } = prev;
+          return rest;
+        });
 
-      // 后端同步（尝试从不同可能的字段获取用户ID）
+        // 移除体重输入卡片
-      try {
+        setMessages((prev) => prev.filter(msg => msg.id !== cardId));
-        // 从后端响应的原始数据中查找可能的用户ID字段
-        const rawUserData = await api.get<any>('/api/users/info');
-        const userId = rawUserData?.id || rawUserData?.userId || rawUserData?._id || 
-                      rawUserData?.user?.id || rawUserData?.user?.userId || rawUserData?.user?._id ||
-                      rawUserData?.profile?.id || rawUserData?.profile?.userId || rawUserData?.profile?._id;
-        
-        if (userId) {
-          await updateUserApi({ userId, weight: val });
-          await dispatch(fetchMyProfile() as any);
-          // 刷新体重历史记录
-          await dispatch(fetchWeightHistory() as any);
-        } else {
-          console.warn('[AI_CHAT] No user ID found for weight sync');
-        }
-      } catch (syncError) {
-        console.warn('[AI_CHAT] Failed to sync weight to server:', syncError);
-        // 不阻断对话体验，但可以给用户一个提示
       }
 
       // 在对话中插入"确认消息"并发送给教练
-      const textMsg = `记录了今日体重：${val} kg。`;
+      const textMsg = `#记体重：\n\n${val} kg`;
       await send(textMsg);
     } catch (e: any) {
       console.error('[AI_CHAT] Error handling weight submission:', e);
@@ -992,14 +909,14 @@ export default function CoachScreen() {
 
   function insertDietInputCard() {
     const id = `dcard_${Date.now()}`;
-    const payload = `__DIET_INPUT_CARD__\n${id}`;
+    const payload = `${CardType.DIET_INPUT}\n${id}`;
     setMessages((prev) => [...prev, { id, role: 'assistant', content: payload }]);
     setTimeout(scrollToEnd, 100);
   }
 
   function handleDietTextInput(cardId: string) {
     // 替换当前的饮食选择卡片为文字输入卡片
-    const payload = `__DIET_TEXT_INPUT__\n${cardId}`;
+    const payload = `${CardType.DIET_TEXT_INPUT}\n${cardId}`;
     setMessages((prev) => prev.map(msg =>
       msg.id === cardId
         ? { ...msg, content: payload }
@@ -1008,9 +925,14 @@ export default function CoachScreen() {
     setTimeout(scrollToEnd, 100);
   }
 
-  async function handleDietPhotoInput(cardId: string) {
+  function handleDietPhotoInput(cardId: string) {
+    console.log('[DIET] handleDietPhotoInput called with cardId:', cardId);
+    setCurrentCardId(cardId);
+    setShowDietPhotoActionSheet(true);
+  }
+
+  async function handleCameraPhoto() {
     try {
-      // 使用现有的拍照功能
       const permissionResult = await ImagePicker.requestCameraPermissionsAsync();
       if (permissionResult.status !== 'granted') {
         Alert.alert('权限不足', '需要相机权限以拍摄食物照片');
@@ -1025,24 +947,7 @@ export default function CoachScreen() {
       });
 
       if (!result.canceled && result.assets?.[0]) {
-        const asset = result.assets[0];
+        await processSelectedImage(result.assets[0]);
-        try {
-          // 上传图片
-          const { url } = await upload(
-            { uri: asset.uri, name: `diet-${Date.now()}.jpg`, type: 'image/jpeg' },
-            { prefix: 'images/diet' }
-          );
-
-          // 移除饮食选择卡片
-          setMessages((prev) => prev.filter(msg => msg.id !== cardId));
-          
-          // 发送包含图片的饮食记录消息
-          const dietMsg = `拍摄了食物照片，请Health Bot帮我分析这餐的营养成分、热量和健康建议：\n\n![食物照片](${url})`;
-          await send(dietMsg);
-        } catch (uploadError) {
-          console.error('[DIET] 图片上传失败:', uploadError);
-          Alert.alert('上传失败', '图片上传失败，请重试');
-        }
       }
     } catch (e: any) {
       console.error('[DIET] 拍照失败:', e);
@@ -1050,9 +955,55 @@ export default function CoachScreen() {
     }
   }
 
+  async function handleLibraryPhoto() {
+    try {
+      const permissionResult = await ImagePicker.requestMediaLibraryPermissionsAsync();
+      if (permissionResult.status !== 'granted') {
+        Alert.alert('权限不足', '需要相册权限以选择食物照片');
+        return;
+      }
+
+      const result = await ImagePicker.launchImageLibraryAsync({
+        mediaTypes: ['images'],
+        allowsEditing: true,
+        quality: 0.9,
+        aspect: [4, 3],
+      });
+
+      if (!result.canceled && result.assets?.[0]) {
+        await processSelectedImage(result.assets[0]);
+      }
+    } catch (e: any) {
+      console.error('[DIET] 选择照片失败:', e);
+      Alert.alert('选择照片失败', e?.message || '选择照片失败，请重试');
+    }
+  }
+
+  async function processSelectedImage(asset: ImagePicker.ImagePickerAsset) {
+    if (!currentCardId) return;
+
+    try {
+      // 上传图片
+      const { url } = await upload(
+        { uri: asset.uri, name: `diet-${Date.now()}.jpg`, type: 'image/jpeg' },
+        { prefix: 'images/diet' }
+      );
+
+      // 移除饮食选择卡片
+      setMessages((prev) => prev.filter(msg => msg.id !== currentCardId));
+
+      // 发送包含图片的饮食记录消息
+      const dietMsg = `#记饮食：\n\n![食物照片](${url})`;
+      await send(dietMsg);
+    } catch (uploadError) {
+      console.error('[DIET] 图片上传失败:', uploadError);
+      Alert.alert('上传失败', '图片上传失败，请重试');
+    }
+  }
+
   function handleBackToDietOptions(cardId: string) {
     // 返回到饮食选择界面
-    const payload = `__DIET_INPUT_CARD__\n${cardId}`;
+    const payload = `${CardType.DIET_INPUT}\n${cardId}`;
     setMessages((prev) => prev.map(msg =>
       msg.id === cardId
         ? { ...msg, content: payload }
@@ -1232,7 +1183,7 @@ export default function CoachScreen() {
             onChangeText={setInput}
             multiline
             onSubmitEditing={() => send(input)}
-            blurOnSubmit={false}
+            submitBehavior="blurAndSubmit"
           />
           <TouchableOpacity
             accessibilityRole="button"
@@ -1257,7 +1208,7 @@ export default function CoachScreen() {
           accessibilityRole="button"
           onPress={scrollToEnd}
           style={[styles.scrollToBottomFab, {
-            bottom:  composerHeight + keyboardOffset + 10, 
+            bottom: composerHeight + keyboardOffset + 10,
             backgroundColor: theme.primary
           }]}
         >
@@ -1320,6 +1271,16 @@ export default function CoachScreen() {
           </View>
         </TouchableOpacity>
       </Modal>
+      <ActionSheet
+        visible={showDietPhotoActionSheet}
+        onClose={() => setShowDietPhotoActionSheet(false)}
+        title="选择图片来源"
+        options={[
+          { id: 'camera', title: '拍照', onPress: handleCameraPhoto },
+          { id: 'library', title: '从相册选择', onPress: handleLibraryPhoto },
+          { id: 'cancel', title: '取消', onPress: () => setShowDietPhotoActionSheet(false) }
+        ]}
+      />
     </View>
   );
 }

app/(tabs)/index.tsx

@@ -16,6 +16,7 @@ import { useRouter } from 'expo-router';
 import React from 'react';
 import { Animated, Image, PanResponder, Pressable, SafeAreaView, ScrollView, StyleSheet, useWindowDimensions, View } from 'react-native';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import { ROUTES, QUERY_PARAMS, ROUTE_PARAMS } from '@/constants/Routes';
 
 // 移除旧的“热门活动”滑动数据，改为固定的“热点功能”卡片
 
@@ -76,7 +77,7 @@ export default function HomeScreen() {
       Animated.spring(pan, { toValue: { x: snapX, y: clampedY }, useNativeDriver: false, bounciness: 6 }).start(() => {
         if (!dragState.current.moved) {
           // 切换到教练 tab，并传递name参数
-          router.push('/coach?name=Iris' as any);
+          router.push(`${ROUTES.TAB_COACH}?${QUERY_PARAMS.COACH_NAME}=Iris` as any);
         }
       });
     },
@@ -113,7 +114,7 @@ export default function HomeScreen() {
         title: '今日训练',
         subtitle: '完成一次普拉提训练，记录你的坚持',
         level: '初学者',
-        onPress: () => pushIfAuthedElseLogin('/workout/today'),
+        onPress: () => pushIfAuthedElseLogin(ROUTES.WORKOUT_TODAY),
       },
       {
         type: 'plan',
@@ -123,7 +124,7 @@ export default function HomeScreen() {
         title: '体态评估',
         subtitle: '评估你的体态，制定训练计划',
         level: '初学者',
-        onPress: () => router.push('/ai-posture-assessment'),
+        onPress: () => router.push(ROUTES.AI_POSTURE_ASSESSMENT),
       },
       ...listRecommendedArticles().map((a) => ({
         type: 'article' as const,
@@ -185,7 +186,7 @@ export default function HomeScreen() {
               image: 'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/imagedemo.jpeg',
               title: c.title || '今日训练',
               subtitle: c.subtitle || '完成一次普拉提训练，记录你的坚持',
-              onPress: () => pushIfAuthedElseLogin('/workout/today'),
+              onPress: () => pushIfAuthedElseLogin(ROUTES.WORKOUT_TODAY),
             });
           }
         }
@@ -204,7 +205,7 @@ export default function HomeScreen() {
   const handlePlanCardPress = () => {
     if (activePlan) {
       // 跳转到训练计划页面的锻炼tab，并传递planId参数
-      router.push(`/training-plan?planId=${activePlan.id}&tab=schedule` as any);
+      router.push(`${ROUTES.TRAINING_PLAN}?${ROUTE_PARAMS.TRAINING_PLAN_ID}=${activePlan.id}&${ROUTE_PARAMS.TRAINING_PLAN_TAB}=${QUERY_PARAMS.TRAINING_PLAN_TAB_SCHEDULE}` as any);
     }
   };
 
@@ -275,7 +276,7 @@ export default function HomeScreen() {
 
               <Pressable
                 style={[styles.featureCard, styles.featureCardQuinary]}
-                onPress={() => pushIfAuthedElseLogin('/workout/today')}
+                onPress={() => pushIfAuthedElseLogin(ROUTES.WORKOUT_TODAY)}
               >
                 <View style={styles.featureIconWrapper}>
                   <View style={styles.featureIconPlaceholder}>
@@ -290,7 +291,7 @@ export default function HomeScreen() {
 
               <Pressable
                 style={[styles.featureCard, styles.featureCardPrimary]}
-                onPress={() => pushIfAuthedElseLogin('/ai-posture-assessment')}
+                onPress={() => pushIfAuthedElseLogin(ROUTES.AI_POSTURE_ASSESSMENT)}
               >
                 <View style={styles.featureIconWrapper}>
                   <Image
@@ -303,7 +304,7 @@ export default function HomeScreen() {
 
               <Pressable
                 style={[styles.featureCard, styles.featureCardQuaternary]}
-                onPress={() => pushIfAuthedElseLogin('/training-plan')}
+                onPress={() => pushIfAuthedElseLogin(ROUTES.TRAINING_PLAN)}
               >
                 <View style={styles.featureIconWrapper}>
                   <View style={styles.featureIconPlaceholder}>

app/_layout.tsx

@@ -16,6 +16,7 @@ import Toast from 'react-native-toast-message';
 
 import { DialogProvider } from '@/components/ui/DialogProvider';
 import { Provider } from 'react-redux';
+import { ROUTES } from '@/constants/Routes';
 
 function Bootstrapper({ children }: { children: React.ReactNode }) {
   const dispatch = useAppDispatch();

app/auth/login.tsx

@@ -14,6 +14,7 @@ import { useAppDispatch } from '@/hooks/redux';
 import { useColorScheme } from '@/hooks/useColorScheme';
 import { login } from '@/store/userSlice';
 import Toast from 'react-native-toast-message';
+import { ROUTES } from '@/constants/Routes';
 
 export default function LoginScreen() {
   const router = useRouter();

app/onboarding/index.tsx

@@ -13,6 +13,7 @@ import {
   TouchableOpacity,
   View
 } from 'react-native';
+import { ROUTES } from '@/constants/Routes';
 
 const { width, height } = Dimensions.get('window');
 
@@ -23,16 +24,16 @@ export default function WelcomeScreen() {
   const textColor = useThemeColor({}, 'text');
 
   const handleGetStarted = () => {
-    router.push('/onboarding/personal-info');
+    router.push(ROUTES.ONBOARDING_PERSONAL_INFO);
   };
 
   const handleSkip = async () => {
     try {
       await AsyncStorage.setItem('@onboarding_completed', 'true');
-      router.replace('/(tabs)');
+      router.replace(ROUTES.TAB_HOME);
     } catch (error) {
       console.error('保存引导状态失败:', error);
-      router.replace('/(tabs)');
+      router.replace(ROUTES.TAB_HOME);
     }
   };
 

app/workout/today.tsx

@@ -22,6 +22,7 @@ import {
   startWorkoutSession
 } from '@/store/workoutSlice';
 import dayjs from 'dayjs';
+import { ROUTES } from '@/constants/Routes';
 
 // ==================== 工具函数 ====================
 
@@ -276,7 +277,7 @@ export default function TodayWorkoutScreen() {
           iconColor: '#10B981',
           onPress: () => {
             // 跳转到创建页面选择训练计划
-            router.push('/workout/create-session');
+            router.push(ROUTES.WORKOUT_CREATE_SESSION);
           }
         }
       ]
@@ -478,7 +479,7 @@ export default function TodayWorkoutScreen() {
         <TouchableOpacity
           style={styles.sessionCardContent}
           onPress={() => {
-            router.push(`/workout/session/${item.id}`);
+            router.push(`${ROUTES.WORKOUT_SESSION}/${item.id}`);
           }}
           activeOpacity={0.9}
         >

components/ArticleCard.tsx

@@ -2,6 +2,7 @@ import dayjs from 'dayjs';
 import { useRouter } from 'expo-router';
 import React from 'react';
 import { Image, Pressable, StyleSheet, Text, View } from 'react-native';
+import { ROUTES } from '@/constants/Routes';
 
 type Props = {
   id: string;
@@ -14,7 +15,7 @@ type Props = {
 export function ArticleCard({ id, title, coverImage, publishedAt, readCount }: Props) {
   const router = useRouter();
   return (
-    <Pressable onPress={() => router.push(`/article/${id}`)} style={styles.card}>
+    <Pressable onPress={() => router.push(`${ROUTES.ARTICLE}/${id}`)} style={styles.card}>
       <Image source={{ uri: coverImage }} style={styles.cover} />
       <View style={styles.meta}>
         <Text style={styles.title} numberOfLines={2}>{title}</Text>

constants/Routes.ts

@@ -0,0 +1,68 @@
+// 应用路由常量定义
+export const ROUTES = {
+  // Tab路由
+  TAB_HOME: '/',
+  TAB_COACH: '/coach',
+  TAB_STATISTICS: '/statistics',
+  TAB_PERSONAL: '/personal',
+  
+  // 训练相关路由
+  WORKOUT_TODAY: '/workout/today',
+  WORKOUT_CREATE_SESSION: '/workout/create-session',
+  WORKOUT_SESSION: '/workout/session',
+  
+  // 训练计划相关路由
+  TRAINING_PLAN: '/training-plan',
+  
+  // 体态评估路由
+  AI_POSTURE_ASSESSMENT: '/ai-posture-assessment',
+  
+  // 挑战路由
+  CHALLENGE: '/challenge',
+  CHALLENGE_DAY: '/challenge/day',
+  
+  // 文章路由
+  ARTICLE: '/article',
+  
+  // 用户相关路由
+  AUTH_LOGIN: '/auth/login',
+  PROFILE_EDIT: '/profile/edit',
+  PROFILE_GOALS: '/profile/goals',
+  
+  // 法律相关路由
+  LEGAL_USER_AGREEMENT: '/legal/user-agreement',
+  LEGAL_PRIVACY_POLICY: '/legal/privacy-policy',
+  
+  // 引导页路由
+  ONBOARDING: '/onboarding',
+  ONBOARDING_PERSONAL_INFO: '/onboarding/personal-info',
+} as const;
+
+// 路由参数常量
+export const ROUTE_PARAMS = {
+  // 训练会话参数
+  WORKOUT_SESSION_ID: 'id',
+  
+  // 训练计划参数
+  TRAINING_PLAN_ID: 'planId',
+  TRAINING_PLAN_TAB: 'tab',
+  
+  // 挑战日参数
+  CHALLENGE_DAY: 'day',
+  
+  // 文章参数
+  ARTICLE_ID: 'id',
+  
+  // 重定向参数
+  REDIRECT_TO: 'redirectTo',
+  REDIRECT_PARAMS: 'redirectParams',
+} as const;
+
+// 查询参数常量
+export const QUERY_PARAMS = {
+  // 训练计划查询参数
+  TRAINING_PLAN_TAB_SCHEDULE: 'schedule',
+  
+  // 教练页面参数
+  COACH_NAME: 'name',
+} as const;