# Change: Simplify Frontend Export Options

## Why

The current frontend has accumulated export options that are no longer needed or rarely used. Following the "Simple OCR" architecture change, we need to streamline the user interface by:

1. Removing redundant export formats that add complexity without significant user value
2. Focusing on the most useful output formats (PDF)
3. Simplifying the translation download options

## What Changes

### TaskDetailPage Changes

**Download Options - Remove:**
- JSON download button
- UnifiedDocument (統一格式) download button
- Markdown download button

**Download Options - Keep:**
- 版面 PDF (Layout PDF)
- 流式 PDF (Reflow PDF)

**Translation Options - Remove:**
- Download translation JSON button
- Download translated Layout PDF option

**Translation Options - Keep:**
- Download translated Reflow PDF (流式 PDF)

**Statistics Section - Keep All:**
- 處理時間 (Processing time)
- 頁數 (Page count)
- 文本區域 (Text regions)
- 表格 (Tables)
- 圖片 (Images)
- 平均置信度 (Average confidence)

### Components - Keep All
- LayoutModelSelector
- PreprocessingSettings
- PreprocessingPreview
- ProcessingTrackSelector

### Pages to Review (Out of Scope)
- SettingsPage (Export rules) - May need separate review
- ResultsPage - May be unused, needs verification

## Impact

- **Affected files**: `frontend/src/pages/TaskDetailPage.tsx`
- **User experience**: Simplified interface with fewer but more relevant options
- **Backend**: No changes required (endpoints remain available for API users)

## Migration

- No data migration required
- Frontend-only changes
- Backend endpoints remain unchanged for API compatibility