✨ feat: 完整应用重构 - 优化界面架构与用户体验

主要变更：
- 重构应用界面：优化首页、登录、认证流程
- 新增用户档案模块：包含完整的档案管理组件
- 优化路由结构：重新组织页面布局和导航
- 改进API集成：新增活动、内容分类等API模块
- 删除冗余组件：清理不必要的文件和依赖

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

components/template-run/result-display.tsx

@@ -13,7 +13,7 @@ import { TemplateGeneration } from '@/lib/types/template-run';
 import { Image } from 'expo-image';
 import { VideoPlayer } from '@/components/video/video-player';
 import { useState } from 'react';
-import { cacheDirectory, documentDirectory, downloadAsync } from 'expo-file-system';
+import * as FileSystem from 'expo-file-system';
 import * as MediaLibrary from 'expo-media-library';
 
 interface ResultDisplayProps {
@@ -102,16 +102,14 @@ export function ResultDisplay({
       }
 
       // 下载文件
-      const targetDirectory = documentDirectory ?? cacheDirectory;
-      if (!targetDirectory) {
-        throw new Error('无法获取可写入的目录');
-      }
-
-      const downloadResult = await downloadAsync(
-        url,
-        `${targetDirectory}generated_${Date.now()}_${index}.${getFileExtension(url)}`
+      const targetDirectory = FileSystem.Paths.document ?? FileSystem.Paths.cache;
+      const destination = new FileSystem.File(
+        targetDirectory,
+        `generated_${Date.now()}_${index}.${getFileExtension(url)}`
       );
 
+      const downloadResult = await FileSystem.File.downloadFileAsync(url, destination);
+
       // 保存到媒体库
       if (result.type === 'IMAGE') {
         await MediaLibrary.saveToLibraryAsync(downloadResult.uri);