24253ac15e
Backend changes: - Apply background image + invisible text layer to all Direct Track PDFs - Add CHART to regions_to_avoid for text extraction - Improve visual fidelity for native PDFs and Office documents Frontend changes: - Remove JSON, UnifiedDocument, Markdown download buttons - Simplify to 2-column layout with only Layout PDF and Reflow PDF - Remove translation JSON download and Layout PDF option - Keep only Reflow PDF for translated document downloads - Clean up unused imports (FileJson, Database, FileOutput) Archives two OpenSpec proposals: - unify-direct-track-pdf-rendering - simplify-frontend-export-options 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
44 lines
2.3 KiB
Markdown
44 lines
2.3 KiB
Markdown
## ADDED Requirements
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### Requirement: Direct Track Background Image Rendering
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The system SHALL render Direct Track PDF output using a full-page background image with an invisible text overlay to preserve visual fidelity while maintaining text extractability.
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#### Scenario: Render Direct Track PDF with background image
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- **WHEN** generating Layout PDF for a Direct Track document
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- **THEN** the system SHALL render each source PDF page as a full-page background image at 2x resolution
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- **AND** overlay invisible text elements using PDF Text Rendering Mode 3
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- **AND** the invisible text SHALL be positioned at original coordinates for accurate selection
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#### Scenario: Handle Office documents (PPT, DOC, XLS)
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- **WHEN** processing an Office document converted to PDF
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- **THEN** the system SHALL use the same background image + invisible text approach
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- **AND** preserve all visual elements including vector graphics, gradients, and complex layouts
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- **AND** the converted PDF in result directory SHALL be used as background source
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#### Scenario: Handle native editable PDFs
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- **WHEN** processing a native PDF through Direct Track
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- **THEN** the system SHALL use the source PDF for background rendering
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- **AND** apply the same invisible text overlay approach
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- **AND** chart regions SHALL be excluded from the text layer
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### Requirement: Chart Region Text Exclusion
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The system SHALL exclude text elements within chart regions from the invisible text layer to prevent duplicate content and unnecessary translation.
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#### Scenario: Detect chart regions
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- **WHEN** classifying page elements for Direct Track
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- **THEN** the system SHALL identify elements with type CHART
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- **AND** add chart bounding boxes to regions_to_avoid list
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#### Scenario: Exclude chart-internal text from invisible layer
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- **WHEN** rendering invisible text layer
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- **THEN** the system SHALL skip text elements whose bounding boxes overlap with chart regions
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- **AND** chart axis labels, legends, and data labels SHALL NOT be in the invisible text layer
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- **AND** these texts remain visible in the background image
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#### Scenario: Chart text not available for translation
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- **WHEN** extracting text for translation from a Direct Track document
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- **THEN** chart-internal text SHALL NOT be included in translatable elements
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- **AND** this is expected behavior as chart labels typically don't require translation
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