## MODIFIED Requirements

### Requirement: Export Interface

The Export interface in TaskDetailPage SHALL provide streamlined download options focusing on PDF formats.

#### Scenario: Download options for completed tasks
- **WHEN** viewing a completed task in TaskDetailPage
- **THEN** the download section SHALL display only two buttons: "版面 PDF" and "流式 PDF"
- **AND** JSON, UnifiedDocument, and Markdown download buttons SHALL NOT be displayed
- **AND** the download grid SHALL use a 2-column layout

#### Scenario: Translation download options
- **WHEN** viewing completed translations in TaskDetailPage
- **THEN** each translation item SHALL display only a "流式 PDF" download button
- **AND** translation JSON download button SHALL NOT be displayed
- **AND** Layout PDF option for translations SHALL NOT be displayed
- **AND** delete translation button SHALL remain available

#### Scenario: Backend API remains unchanged
- **WHEN** external clients call download endpoints directly
- **THEN** JSON, Markdown, and UnifiedDocument endpoints SHALL still function
- **AND** translated Layout PDF endpoint SHALL still function
- **AND** no backend changes are required for this frontend simplification