feat: 添加任务刷新功能至任务上下文，并在任务列表屏幕中实现下拉刷新

src/context/TasksContext.tsx

@@ -23,6 +23,7 @@ interface TasksContextData {
   refreshConfig: () => Promise<void>;
   isConfigLoaded: boolean;
   fetchTaskDetail: (taskId: string) => Promise<void>;
+  refreshTasks: () => Promise<void>;
 }
 
 const TasksContext = createContext<TasksContextData>({} as TasksContextData);
@@ -34,7 +35,7 @@ export const TasksProvider: React.FC<{ children: ReactNode }> = ({
   const [isConfigLoaded, setIsConfigLoaded] = useState(false);
   const [serverUrl, setServerUrl] = useState<string | null>(null);
 
-  const fetchTasks = useCallback(async () => {
+  const refreshTasks = useCallback(async () => {
     if (!isConfigLoaded) return;
     try {
       const fetchedTasks = await getTasksService({ pageNum: 1, pageSize: 100 });
@@ -67,9 +68,9 @@ export const TasksProvider: React.FC<{ children: ReactNode }> = ({
 
   useEffect(() => {
     if (isConfigLoaded) {
-      fetchTasks();
+      refreshTasks();
     }
-  }, [isConfigLoaded, fetchTasks]);
+  }, [isConfigLoaded, refreshTasks]);
 
   const applyConfig = (config: AppConfig) => {
     if (config.serverUrl) {
@@ -129,6 +130,7 @@ export const TasksProvider: React.FC<{ children: ReactNode }> = ({
       refreshConfig,
       isConfigLoaded,
       fetchTaskDetail,
+      refreshTasks,
     }),
     [
       tasks,
@@ -138,6 +140,7 @@ export const TasksProvider: React.FC<{ children: ReactNode }> = ({
       refreshConfig,
       isConfigLoaded,
       fetchTaskDetail,
+      refreshTasks,
     ],
   );
 

src/screens/TaskListScreen.tsx

@@ -1,7 +1,14 @@
-import React from 'react';
-import { View, StyleSheet, FlatList } from 'react-native';
+import React, { useLayoutEffect, useState, useCallback } from 'react';
+import {
+  View,
+  StyleSheet,
+  FlatList,
+  TouchableOpacity,
+  ActivityIndicator,
+} from 'react-native';
 import { useNavigation } from '@react-navigation/native';
 import { StackNavigationProp } from '@react-navigation/stack';
+import MaterialIcons from 'react-native-vector-icons/MaterialIcons';
 import { useTasks } from '../context/TasksContext';
 import TaskCard from '../components/TaskCard';
 
@@ -16,10 +23,34 @@ type TaskListNavigationProp = StackNavigationProp<
 >;
 
 export default function TaskListScreen() {
-  const { tasks } = useTasks();
-  console.log('tasks', tasks);
-
+  const { tasks, refreshTasks } = useTasks();
   const navigation = useNavigation<TaskListNavigationProp>();
+  const [isRefreshing, setIsRefreshing] = useState(false);
+
+  const handleRefresh = useCallback(async () => {
+    setIsRefreshing(true);
+    try {
+      await refreshTasks();
+    } catch (error) {
+      console.error('刷新任务失败:', error);
+    } finally {
+      setIsRefreshing(false);
+    }
+  }, [refreshTasks]);
+
+  useLayoutEffect(() => {
+    navigation.setOptions({
+      headerRight: () => (
+        <TouchableOpacity onPress={handleRefresh} style={{ marginRight: 15 }}>
+          {isRefreshing ? (
+            <ActivityIndicator size="small" color="#ffffff" />
+          ) : (
+            <MaterialIcons name="refresh" size={24} color="#ffffff" />
+          )}
+        </TouchableOpacity>
+      ),
+    });
+  }, [navigation, isRefreshing, handleRefresh]);
 
   const handlePressTask = (id: string) => {
     navigation.navigate('TaskEdit', { taskId: id });