Complete text alignment parity between OCR and Direct tracks:
**OCR Track Alignment Support (Task 5.3.5)**
- Extract alignment from region style (StyleInfo or dict)
- Support left/right/center/justify alignment in draw_text_region
- Calculate line_x position based on alignment setting:
- Left: line_x = pdf_x (default)
- Center: line_x = pdf_x + (bbox_width - text_width) / 2
- Right: line_x = pdf_x + bbox_width - text_width
- Justify: word spacing distribution (except last line)
- Lines 1179-1247 in pdf_generator_service.py
- OCR track now has feature parity with Direct track for alignment
**Enhanced spacing_after Handling (Task 5.2.4-5.2.5)**
- Calculate actual text height: len(lines) * line_height
- Compute bbox_bottom_margin to show implicit spacing
- Add detailed logging with actual_height and bbox_bottom_margin
- Document that spacing_after is inherent in bbox-based layout
- If text is shorter than bbox, remaining space acts as spacing
- Lines 1680-1689 in pdf_generator_service.py
**Technical Details**
- Both tracks now support identical alignment modes
- spacing_after is implicitly present in element positioning
- bbox_bottom_margin = bbox_height - actual_text_height - spacing_before
- This shows how much space remains below the text (implicit spacing_after)
**Modified Files**
- backend/app/services/pdf_generator_service.py
- Lines 1179-1185: Alignment extraction for OCR track
- Lines 1222-1247: OCR track alignment calculation and rendering
- Lines 1680-1689: spacing_after analysis with bbox_bottom_margin
- openspec/changes/pdf-layout-restoration/tasks.md
- Added 5.2.5: bbox_bottom_margin calculation
- Added 5.3.5: OCR track alignment support
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Co-Authored-By: Claude <noreply@anthropic.com>
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