feat: 新增任务详情页面及相关功能

- 创建任务详情页面，展示任务的详细信息，包括状态、描述、优先级和进度
- 实现任务完成和跳过功能，用户可通过按钮操作更新任务状态
- 添加评论功能，用户可以对任务进行评论并发送
- 优化任务卡片，点击后可跳转至任务详情页面
- 更新相关样式，确保界面一致性和美观性

app/task-detail.tsx

@@ -0,0 +1,649 @@
+import { useGlobalDialog } from '@/components/ui/DialogProvider';
+import { HeaderBar } from '@/components/ui/HeaderBar';
+import { Colors } from '@/constants/Colors';
+import { useAppDispatch, useAppSelector } from '@/hooks/redux';
+import { useColorScheme } from '@/hooks/useColorScheme';
+import { completeTask, skipTask } from '@/store/tasksSlice';
+import MaterialIcons from '@expo/vector-icons/MaterialIcons';
+import { useLocalSearchParams, useRouter } from 'expo-router';
+import React, { useState } from 'react';
+import {
+  Alert,
+  Image,
+  ScrollView,
+  StyleSheet,
+  Text,
+  TextInput,
+  TouchableOpacity,
+  View
+} from 'react-native';
+
+export default function TaskDetailScreen() {
+  const { taskId } = useLocalSearchParams<{ taskId: string }>();
+  const router = useRouter();
+  const theme = useColorScheme() ?? 'light';
+  const colorTokens = Colors[theme];
+  const dispatch = useAppDispatch();
+  const { showConfirm } = useGlobalDialog();
+  
+  // 从Redux中获取任务数据
+  const { tasks, tasksLoading } = useAppSelector(state => state.tasks);
+  const task = tasks.find(t => t.id === taskId) || null;
+  
+  const [comment, setComment] = useState('');
+
+  const getStatusText = (status: string) => {
+    switch (status) {
+      case 'completed':
+        return '已完成';
+      case 'in_progress':
+        return '进行中';
+      case 'overdue':
+        return '已过期';
+      case 'skipped':
+        return '已跳过';
+      default:
+        return '待开始';
+    }
+  };
+
+  const getStatusColor = (status: string) => {
+    switch (status) {
+      case 'completed':
+        return '#10B981';
+      case 'in_progress':
+        return '#7A5AF8';
+      case 'overdue':
+        return '#EF4444';
+      case 'skipped':
+        return '#6B7280';
+      default:
+        return '#6B7280';
+    }
+  };
+
+  const getDifficultyText = (difficulty: string) => {
+    switch (difficulty) {
+      case 'very_easy':
+        return '非常简单 (少于一天)';
+      case 'easy':
+        return '简单 (1-2天)';
+      case 'medium':
+        return '中等 (3-5天)';
+      case 'hard':
+        return '困难 (1-2周)';
+      case 'very_hard':
+        return '非常困难 (2周以上)';
+      default:
+        return '非常简单 (少于一天)';
+    }
+  };
+
+  const getDifficultyColor = (difficulty: string) => {
+    switch (difficulty) {
+      case 'very_easy':
+        return '#10B981';
+      case 'easy':
+        return '#34D399';
+      case 'medium':
+        return '#F59E0B';
+      case 'hard':
+        return '#F97316';
+      case 'very_hard':
+        return '#EF4444';
+      default:
+        return '#10B981';
+    }
+  };
+
+  const formatDate = (dateString: string) => {
+    const date = new Date(dateString);
+    const options: Intl.DateTimeFormatOptions = { 
+      year: 'numeric', 
+      month: 'long', 
+      day: 'numeric' 
+    };
+    return `创建于 ${date.toLocaleDateString('zh-CN', options)}`;
+  };
+
+  const handleCompleteTask = async () => {
+    if (!task || task.status === 'completed') {
+      return;
+    }
+
+    try {
+      await dispatch(completeTask({ 
+        taskId: task.id, 
+        completionData: { 
+          count: 1,
+          notes: '通过任务详情页面完成'
+        } 
+      })).unwrap();
+      
+      // 检查任务是否真正完成（当前完成次数是否达到目标次数）
+      const updatedTask = tasks.find(t => t.id === task.id);
+      if (updatedTask && updatedTask.currentCount >= updatedTask.targetCount) {
+        Alert.alert('成功', '任务已完成！');
+        router.back();
+      } else {
+        Alert.alert('成功', '任务进度已更新！');
+      }
+    } catch (error) {
+      Alert.alert('错误', '完成任务失败，请重试');
+    }
+  };
+
+  const handleSkipTask = async () => {
+    if (!task || task.status === 'completed' || task.status === 'skipped') {
+      return;
+    }
+
+    showConfirm(
+      {
+        title: '确认跳过任务',
+        message: `确定要跳过任务"${task.title}"吗？\n\n跳过后的任务将不会显示在任务列表中，且无法恢复。`,
+        confirmText: '跳过',
+        cancelText: '取消',
+        destructive: true,
+        icon: 'warning',
+        iconColor: '#F59E0B',
+      },
+      async () => {
+        try {
+          await dispatch(skipTask({ 
+            taskId: task.id, 
+            skipData: { 
+              reason: '用户主动跳过'
+            } 
+          })).unwrap();
+          
+          Alert.alert('成功', '任务已跳过！');
+          router.back();
+        } catch (error) {
+          Alert.alert('错误', '跳过任务失败，请重试');
+        }
+      }
+    );
+  };
+
+  const handleSendComment = () => {
+    if (comment.trim()) {
+      // 这里应该调用API发送评论
+      console.log('发送评论:', comment);
+      setComment('');
+      Alert.alert('成功', '评论已发送！');
+    }
+  };
+
+  if (tasksLoading) {
+    return (
+      <View style={[styles.container, { backgroundColor: colorTokens.background }]}>
+        <HeaderBar 
+          title="任务详情" 
+          onBack={() => router.back()}
+        />
+        <View style={styles.loadingContainer}>
+          <Text style={[styles.loadingText, { color: colorTokens.text }]}>加载中...</Text>
+        </View>
+      </View>
+    );
+  }
+
+  if (!task) {
+    return (
+      <View style={[styles.container, { backgroundColor: colorTokens.background }]}>
+        <HeaderBar 
+          title="任务详情" 
+          onBack={() => router.back()}
+        />
+        <View style={styles.errorContainer}>
+          <Text style={[styles.errorText, { color: colorTokens.text }]}>任务不存在</Text>
+        </View>
+      </View>
+    );
+  }
+
+  return (
+    <View style={[styles.container, { backgroundColor: colorTokens.background }]}>
+      {/* 使用HeaderBar组件 */}
+      <HeaderBar 
+        title="任务详情" 
+        onBack={() => router.back()}
+        right={
+          task.status !== 'completed' && task.status !== 'skipped' && task.currentCount < task.targetCount ? (
+            <TouchableOpacity onPress={handleCompleteTask} style={styles.completeButton}>
+              <Image
+                source={require('@/assets/images/task/iconTaskHeader.png')}
+                style={styles.taskIcon}
+                resizeMode="contain"
+              />
+            </TouchableOpacity>
+          ) : undefined
+        }
+      />
+
+      <ScrollView style={styles.scrollView} showsVerticalScrollIndicator={false}>
+        {/* 任务标题和创建时间 */}
+        <View style={styles.titleSection}>
+          <Text style={[styles.taskTitle, { color: colorTokens.text }]}>{task.title}</Text>
+          <Text style={[styles.createdDate, { color: colorTokens.textSecondary }]}>
+            {formatDate(task.startDate)}
+          </Text>
+        </View>
+
+        {/* 状态标签 */}
+        <View style={styles.statusContainer}>
+          <View style={[styles.statusTag, { backgroundColor: getStatusColor(task.status) }]}>
+            <Text style={styles.statusTagText}>{getStatusText(task.status)}</Text>
+          </View>
+        </View>
+
+        {/* 描述区域 */}
+        <View style={styles.descriptionSection}>
+          <Text style={[styles.sectionTitle, { color: colorTokens.text }]}>描述</Text>
+          <Text style={[styles.descriptionText, { color: colorTokens.textSecondary }]}>
+            {task.description || '暂无描述'}
+          </Text>
+        </View>
+
+        {/* 优先级和难度 */}
+        <View style={styles.infoSection}>
+          <View style={styles.infoItem}>
+            <Text style={[styles.infoLabel, { color: colorTokens.text }]}>优先级</Text>
+            <View style={styles.priorityTag}>
+              <MaterialIcons name="flag" size={16} color="#FFFFFF" />
+              <Text style={styles.priorityTagText}>高</Text>
+            </View>
+          </View>
+          
+          <View style={styles.infoItem}>
+            <Text style={[styles.infoLabel, { color: colorTokens.text }]}>难度</Text>
+            <View style={[styles.difficultyTag, { backgroundColor: getDifficultyColor('very_easy') }]}>
+              <MaterialIcons name="sentiment-satisfied" size={16} color="#FFFFFF" />
+              <Text style={styles.difficultyTagText}>非常简单 (少于一天)</Text>
+            </View>
+          </View>
+        </View>
+
+        {/* 任务进度信息 */}
+        <View style={styles.progressSection}>
+          <Text style={[styles.sectionTitle, { color: colorTokens.text }]}>进度</Text>
+          
+          {/* 进度条 */}
+          <View style={styles.progressBar}>
+            <View
+              style={[
+                styles.progressFill,
+                {
+                  width: task.progressPercentage > 0 ? `${Math.min(task.progressPercentage, 100)}%` : '2%',
+                  backgroundColor: task.progressPercentage >= 100 
+                    ? '#10B981' 
+                    : task.progressPercentage >= 50 
+                    ? '#F59E0B' 
+                    : task.progressPercentage > 0
+                    ? colorTokens.primary
+                    : '#E5E7EB',
+                },
+              ]}
+            />
+            {task.progressPercentage > 0 && task.progressPercentage < 100 && (
+              <View style={styles.progressGlow} />
+            )}
+            {/* 进度文本 */}
+            <View style={styles.progressTextContainer}>
+              <Text style={styles.progressText}>{task.currentCount}/{task.targetCount}</Text>
+            </View>
+          </View>
+
+          {/* 进度详细信息 */}
+          <View style={styles.progressInfo}>
+            <View style={styles.progressItem}>
+              <Text style={[styles.progressLabel, { color: colorTokens.textSecondary }]}>目标次数</Text>
+              <Text style={[styles.progressValue, { color: colorTokens.text }]}>{task.targetCount}</Text>
+            </View>
+            <View style={styles.progressItem}>
+              <Text style={[styles.progressLabel, { color: colorTokens.textSecondary }]}>已完成</Text>
+              <Text style={[styles.progressValue, { color: colorTokens.text }]}>{task.currentCount}</Text>
+            </View>
+            <View style={styles.progressItem}>
+              <Text style={[styles.progressLabel, { color: colorTokens.textSecondary }]}>剩余天数</Text>
+              <Text style={[styles.progressValue, { color: colorTokens.text }]}>{task.daysRemaining}</Text>
+            </View>
+          </View>
+        </View>
+
+        {/* 评论区域 */}
+        <View style={styles.commentSection}>
+          <Text style={[styles.sectionTitle, { color: colorTokens.text }]}>评论区域</Text>
+          <View style={styles.commentInputContainer}>
+            <View style={styles.commentAvatar}>
+              <Image
+                source={require('@/assets/images/Sealife.jpeg')}
+                style={styles.commentAvatarImage}
+                resizeMode="cover"
+              />
+            </View>
+            <View style={styles.commentInputWrapper}>
+              <TextInput
+                style={[styles.commentInput, { 
+                  color: colorTokens.text,
+                  backgroundColor: '#F3F4F6'
+                }]}
+                placeholder="写评论..."
+                placeholderTextColor="#9CA3AF"
+                value={comment}
+                onChangeText={setComment}
+                multiline
+                maxLength={500}
+              />
+              <TouchableOpacity 
+                style={[styles.sendButton, { 
+                  backgroundColor: comment.trim() ? '#6B7280' : '#D1D5DB' 
+                }]}
+                onPress={handleSendComment}
+                disabled={!comment.trim()}
+              >
+                <MaterialIcons name="send" size={16} color="#FFFFFF" />
+              </TouchableOpacity>
+            </View>
+          </View>
+        </View>
+
+        {/* 底部操作按钮 */}
+        {task.status !== 'completed' && task.status !== 'skipped' && task.currentCount < task.targetCount && (
+          <View style={styles.actionButtons}>
+            <TouchableOpacity 
+              style={[styles.actionButton, styles.skipButton]} 
+              onPress={handleSkipTask}
+            >
+              <MaterialIcons name="skip-next" size={20} color="#6B7280" />
+              <Text style={styles.skipButtonText}>跳过任务</Text>
+            </TouchableOpacity>
+          </View>
+        )}
+      </ScrollView>
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+  },
+  loadingContainer: {
+    flex: 1,
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  loadingText: {
+    fontSize: 16,
+    fontWeight: '500',
+  },
+  errorContainer: {
+    flex: 1,
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  errorText: {
+    fontSize: 16,
+    fontWeight: '500',
+  },
+  completeButton: {
+    width: 32,
+    height: 32,
+    borderRadius: 16,
+    backgroundColor: '#7A5AF8',
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  taskIcon: {
+    width: 20,
+    height: 20,
+  },
+  scrollView: {
+    flex: 1,
+  },
+  titleSection: {
+    padding: 16,
+    paddingBottom: 8,
+  },
+  taskTitle: {
+    fontSize: 20,
+    fontWeight: '600',
+    lineHeight: 28,
+    marginBottom: 4,
+  },
+  createdDate: {
+    fontSize: 14,
+    fontWeight: '400',
+    opacity: 0.7,
+  },
+  statusContainer: {
+    paddingHorizontal: 16,
+    paddingBottom: 16,
+    alignItems: 'flex-end',
+  },
+  statusTag: {
+    alignSelf: 'flex-end',
+    paddingHorizontal: 12,
+    paddingVertical: 6,
+    borderRadius: 16,
+  },
+  statusTagText: {
+    fontSize: 14,
+    fontWeight: '600',
+    color: '#FFFFFF',
+  },
+  imagePlaceholder: {
+    height: 240,
+    backgroundColor: '#F9FAFB',
+    marginHorizontal: 16,
+    marginBottom: 20,
+    borderRadius: 12,
+    borderWidth: 2,
+    borderColor: '#E5E7EB',
+    borderStyle: 'dashed',
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  imagePlaceholderText: {
+    fontSize: 16,
+    fontWeight: '500',
+    color: '#9CA3AF',
+    marginTop: 8,
+  },
+  descriptionSection: {
+    paddingHorizontal: 16,
+    marginBottom: 20,
+  },
+  sectionTitle: {
+    fontSize: 16,
+    fontWeight: '600',
+    marginBottom: 12,
+  },
+  descriptionText: {
+    fontSize: 15,
+    lineHeight: 22,
+    fontWeight: '400',
+  },
+  infoSection: {
+    paddingHorizontal: 16,
+    marginBottom: 20,
+  },
+  infoItem: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-between',
+    marginBottom: 12,
+  },
+  infoLabel: {
+    fontSize: 15,
+    fontWeight: '500',
+  },
+  priorityTag: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 4,
+    paddingHorizontal: 10,
+    paddingVertical: 4,
+    borderRadius: 12,
+    backgroundColor: '#EF4444',
+  },
+  priorityTagText: {
+    fontSize: 13,
+    fontWeight: '600',
+    color: '#FFFFFF',
+  },
+  difficultyTag: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 4,
+    paddingHorizontal: 10,
+    paddingVertical: 4,
+    borderRadius: 12,
+  },
+  difficultyTagText: {
+    fontSize: 13,
+    fontWeight: '600',
+    color: '#FFFFFF',
+  },
+  progressSection: {
+    paddingHorizontal: 16,
+    marginBottom: 20,
+  },
+  progressBar: {
+    height: 6,
+    backgroundColor: '#F3F4F6',
+    borderRadius: 3,
+    marginBottom: 16,
+    overflow: 'visible',
+    shadowColor: '#000',
+    shadowOffset: { width: 0, height: 1 },
+    shadowOpacity: 0.1,
+    shadowRadius: 2,
+    elevation: 2,
+    position: 'relative',
+  },
+  progressFill: {
+    height: '100%',
+    borderRadius: 3,
+    shadowColor: '#000',
+    shadowOffset: { width: 0, height: 1 },
+    shadowOpacity: 0.2,
+    shadowRadius: 2,
+    elevation: 3,
+  },
+  progressGlow: {
+    position: 'absolute',
+    right: 0,
+    top: 0,
+    width: 8,
+    height: '100%',
+    backgroundColor: 'rgba(255, 255, 255, 0.6)',
+    borderRadius: 3,
+  },
+  progressTextContainer: {
+    position: 'absolute',
+    right: 0,
+    top: -6,
+    backgroundColor: '#FFFFFF',
+    paddingHorizontal: 6,
+    paddingVertical: 2,
+    borderRadius: 8,
+    shadowColor: '#000',
+    shadowOffset: { width: 0, height: 1 },
+    shadowOpacity: 0.1,
+    shadowRadius: 2,
+    elevation: 2,
+    borderWidth: 1,
+    borderColor: '#E5E7EB',
+    zIndex: 1,
+  },
+  progressText: {
+    fontSize: 10,
+    fontWeight: '600',
+    color: '#374151',
+  },
+  progressInfo: {
+    flexDirection: 'row',
+    justifyContent: 'space-between',
+  },
+  progressItem: {
+    alignItems: 'center',
+    flex: 1,
+  },
+  progressLabel: {
+    fontSize: 13,
+    fontWeight: '400',
+    marginBottom: 4,
+  },
+  progressValue: {
+    fontSize: 18,
+    fontWeight: '600',
+  },
+  commentSection: {
+    paddingHorizontal: 16,
+    marginBottom: 20,
+  },
+  commentInputContainer: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 12,
+  },
+  commentAvatar: {
+    width: 28,
+    height: 28,
+    borderRadius: 14,
+    overflow: 'hidden',
+  },
+  commentAvatarImage: {
+    width: '100%',
+    height: '100%',
+  },
+  commentInputWrapper: {
+    flex: 1,
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 8,
+  },
+  commentInput: {
+    flex: 1,
+    minHeight: 36,
+    maxHeight: 120,
+    paddingHorizontal: 12,
+    paddingVertical: 8,
+    borderRadius: 18,
+    fontSize: 15,
+    textAlignVertical: 'top',
+  },
+  sendButton: {
+    width: 28,
+    height: 28,
+    borderRadius: 14,
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  actionButtons: {
+    paddingHorizontal: 16,
+    paddingBottom: 20,
+  },
+  actionButton: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'center',
+    gap: 8,
+    paddingVertical: 12,
+    paddingHorizontal: 16,
+    borderRadius: 8,
+    borderWidth: 1,
+  },
+  skipButton: {
+    backgroundColor: '#F9FAFB',
+    borderColor: '#E5E7EB',
+  },
+  skipButtonText: {
+    fontSize: 16,
+    fontWeight: '500',
+    color: '#6B7280',
+  },
+});

components/TaskCard.tsx

@@ -5,6 +5,7 @@ import { useColorScheme } from '@/hooks/useColorScheme';
 import { completeTask, skipTask } from '@/store/tasksSlice';
 import { TaskListItem } from '@/types/goals';
 import MaterialIcons from '@expo/vector-icons/MaterialIcons';
+import { useRouter } from 'expo-router';
 import React from 'react';
 import { Alert, Image, StyleSheet, Text, TouchableOpacity, View } from 'react-native';
 
@@ -19,6 +20,7 @@ export const TaskCard: React.FC<TaskCardProps> = ({
   const colorTokens = Colors[theme];
   const dispatch = useAppDispatch();
   const { showConfirm } = useGlobalDialog();
+  const router = useRouter();
 
 
   const getStatusText = (status: string) => {
@@ -123,6 +125,10 @@ export const TaskCard: React.FC<TaskCardProps> = ({
     );
   };
 
+  const handleTaskPress = () => {
+    router.push(`/task-detail?taskId=${task.id}`);
+  };
+
   const renderActionIcons = () => {
     if (task.status === 'completed' || task.status === 'overdue' || task.status === 'skipped') {
       return null;
@@ -158,7 +164,7 @@ export const TaskCard: React.FC<TaskCardProps> = ({
   return (
     <TouchableOpacity
       style={[styles.container, { backgroundColor: colorTokens.background }]}
-      onPress={() => {}}
+      onPress={handleTaskPress}
       activeOpacity={0.7}
     >
       {/* 头部区域 */}
@@ -205,23 +211,21 @@ export const TaskCard: React.FC<TaskCardProps> = ({
         )}
         {/* 进度百分比文本 */}
         <View style={styles.progressTextContainer}>
-          <Text style={styles.progressText}>{Math.round(task.progressPercentage)}%</Text>
+          <Text style={styles.progressText}>{task.currentCount}/{task.targetCount}</Text>
         </View>
       </View>
 
       {/* 底部信息 */}
       <View style={styles.footer}>
         <View style={styles.teamSection}>
-          {/* 模拟团队成员头像 */}
+          {/* 团队成员头像 */}
           <View style={styles.avatars}>
-            <View style={[styles.avatar, { backgroundColor: '#FBBF24' }]}>
-              <Text style={styles.avatarText}>A</Text>
-            </View>
-            <View style={[styles.avatar, { backgroundColor: '#34D399' }]}>
-              <Text style={styles.avatarText}>B</Text>
-            </View>
-            <View style={[styles.avatar, { backgroundColor: '#60A5FA' }]}>
-              <Text style={styles.avatarText}>C</Text>
+            <View style={styles.avatar}>
+              <Image
+                source={require('@/assets/images/Sealife.jpeg')}
+                style={styles.avatarImage}
+                resizeMode="cover"
+              />
             </View>
           </View>
         </View>
@@ -395,17 +399,15 @@ const styles = StyleSheet.create({
   avatar: {
     width: 24,
     height: 24,
-    borderRadius: 12,
-    alignItems: 'center',
-    justifyContent: 'center',
+    borderRadius: 24,
     marginRight: -8,
     borderWidth: 2,
     borderColor: '#FFFFFF',
+    overflow: 'hidden',
   },
-  avatarText: {
-    fontSize: 10,
-    fontWeight: '600',
-    color: '#FFFFFF',
+  avatarImage: {
+    width: '100%',
+    height: '100%',
   },
   infoSection: {
     flexDirection: 'row',

components/TaskProgressCard.tsx

@@ -22,8 +22,7 @@ export const TaskProgressCard: React.FC<TaskProgressCardProps> = ({
       {/* 标题区域 */}
       <View style={styles.header}>
         <View style={styles.titleContainer}>
-          <Text style={styles.title}>任务状态统计</Text>
-          <Text style={styles.subtitle}>各状态任务数量分布</Text>
+          <Text style={styles.title}>统计</Text>
         </View>
         {headerButtons && (
           <View style={styles.headerButtons}>
@@ -82,7 +81,7 @@ const styles = StyleSheet.create({
     marginBottom: 20,
     flexDirection: 'row',
     justifyContent: 'space-between',
-    alignItems: 'flex-start',
+    alignItems: 'center',
   },
   titleContainer: {
     flex: 1,

components/ui/HeaderBar.tsx

@@ -45,38 +45,6 @@ export function HeaderBar({
     }
   };
 
-  const getBackButtonStyle = () => {
-    const baseStyle = [styles.backButton];
-    
-    switch (variant) {
-      case 'elevated':
-        return [...baseStyle, { 
-          backgroundColor: `${theme.primary}15`, // 15% 透明度
-          borderWidth: 1,
-          borderColor: `${theme.primary}20`, // 20% 透明度
-        }];
-      case 'minimal':
-        return [...baseStyle, { 
-          backgroundColor: `${theme.neutral100}80`, // 80% 透明度
-        }];
-      default:
-        return [...baseStyle, { 
-          backgroundColor: `${theme.accentGreen}20`, // 20% 透明度
-        }];
-    }
-  };
-
-  const getBackButtonIconColor = () => {
-    switch (variant) {
-      case 'elevated':
-        return theme.primary;
-      case 'minimal':
-        return theme.textSecondary;
-      default:
-        return theme.onPrimary;
-    }
-  };
-
   const getBorderStyle = () => {
     if (!showBottomBorder) return {};
     
@@ -110,13 +78,13 @@ export function HeaderBar({
         <TouchableOpacity 
           accessibilityRole="button" 
           onPress={onBack} 
-          style={getBackButtonStyle()}
+          style={styles.backButton}
           activeOpacity={0.7}
         >
           <Ionicons 
             name="chevron-back" 
-            size={20} 
-            color={getBackButtonIconColor()} 
+            size={24} 
+            color={theme.text} 
           />
         </TouchableOpacity>
       ) : (
@@ -157,17 +125,8 @@ const styles = StyleSheet.create({
   backButton: {
     width: 32,
     height: 32,
-    borderRadius: 16,
     alignItems: 'center',
     justifyContent: 'center',
-    shadowColor: '#000',
-    shadowOffset: {
-      width: 0,
-      height: 1,
-    },
-    shadowOpacity: 0.1,
-    shadowRadius: 2,
-    elevation: 2,
   },
   titleContainer: {
     flex: 1,

constants/Routes.ts

@@ -37,6 +37,9 @@ export const ROUTES = {
   // 营养相关路由
   NUTRITION_RECORDS: '/nutrition/records',
 
+  // 任务相关路由
+  TASK_DETAIL: '/task-detail',
+
   // 目标管理路由 (已移至tab中)
   // GOAL_MANAGEMENT: '/goal-management',
 } as const;
@@ -56,6 +59,9 @@ export const ROUTE_PARAMS = {
   // 文章参数
   ARTICLE_ID: 'id',
 
+  // 任务参数
+  TASK_ID: 'taskId',
+
   // 重定向参数
   REDIRECT_TO: 'redirectTo',
   REDIRECT_PARAMS: 'redirectParams',