chore: project cleanup and prepare for dual-track processing refactor
- Removed all test files and directories - Deleted outdated documentation (will be rewritten) - Cleaned up temporary files, logs, and uploads - Archived 5 completed OpenSpec proposals - Created new dual-track-document-processing proposal with complete OpenSpec structure - Dual-track architecture: OCR track (PaddleOCR) + Direct track (PyMuPDF) - UnifiedDocument model for consistent output - Support for structure-preserving translation - Updated .gitignore to prevent future test/temp files This is a major cleanup preparing for the complete refactoring of the document processing pipeline. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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# Implementation Tasks
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## 1. Backend - Fix Image Extraction and Saving (PREREQUISITE) ✅
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- [x] 1.1 Locate `analyze_layout()` function in `backend/app/services/ocr_service.py`
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- [x] 1.2 Find image saving code at lines 554-561 where `markdown_images.items()` is iterated
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- [x] 1.3 Add code to create `imgs/` subdirectory in result folder before saving images
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- [x] 1.4 Extract `img_obj` from `(img_path, img_obj)` tuple in loop
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- [x] 1.5 Construct full image file path: `image_path.parent / img_path`
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- [x] 1.6 Save each `img_obj` to disk using PIL `Image.save()` method
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- [x] 1.7 Add error handling for image save failures (log warning but continue)
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- [x] 1.8 Test with document containing images - verify `imgs/` folder created
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- [x] 1.9 Verify saved image files match paths in JSON `images_metadata`
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- [x] 1.10 Test multi-page PDF with images on different pages
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## 2. Backend - Environment Setup ✅
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- [x] 2.1 Install ReportLab library: `pip install reportlab`
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- [x] 2.2 Verify Pillow is already installed (used for image handling)
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- [x] 2.3 Download and install Noto Sans CJK font (TrueType format)
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- [x] 2.4 Configure font path in backend settings
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- [x] 2.5 Test Chinese character rendering
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## 3. Backend - PDF Generation Service ✅
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- [x] 3.1 Create `pdf_generator_service.py` in `app/services/`
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- [x] 3.2 Implement `load_ocr_json(json_path)` to parse JSON results
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- [x] 3.3 Implement `calculate_page_dimensions(text_regions)` to infer page size from bbox
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- [x] 3.4 Implement `get_original_page_size(file_path)` to extract from source file
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- [x] 3.5 Implement `draw_text_region(canvas, region, font, page_height)` to render text at bbox
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- [x] 3.6 Implement `generate_layout_pdf(json_path, output_path)` main function
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- [x] 3.7 Handle coordinate transformation (OCR coords to PDF coords)
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- [x] 3.8 Add font size calculation based on bbox height
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- [x] 3.9 Handle multi-page documents
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- [x] 3.10 Add caching logic (check if PDF already exists)
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- [x] 3.11 Implement `draw_table_region(canvas, region)` using ReportLab Table
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- [x] 3.12 Implement `draw_image_region(canvas, region)` from images_metadata (reads from saved imgs/)
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## 4. Backend - PDF Download Endpoint Fix ✅
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- [x] 4.1 Update `/tasks/{id}/download/pdf` endpoint in tasks.py router
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- [x] 4.2 Check if PDF already exists; if not, trigger on-demand generation
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- [x] 4.3 Serve pre-generated PDF file from task result directory
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- [x] 4.4 Add error handling for missing PDF or generation failures
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- [x] 4.5 Test PDF download endpoint returns 200 with valid PDF
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## 5. Backend - Integrate PDF Generation into OCR Flow (REQUIRED) ✅
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- [x] 5.1 Modify OCR service to generate PDF automatically after JSON creation
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- [x] 5.2 Update `save_results()` to return (json_path, markdown_path, pdf_path)
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- [x] 5.3 PDF generation integrated into OCR completion flow
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- [x] 5.4 PDF generated synchronously during OCR processing (avoids timeout issues)
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- [x] 5.5 Test PDF generation triggers automatically after OCR completes
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## 6. Frontend - Install Dependencies ✅
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- [x] 6.1 Install react-pdf: `npm install react-pdf`
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- [x] 6.2 Install pdfjs-dist (peer dependency): `npm install pdfjs-dist`
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- [x] 6.3 Configure vite for PDF.js worker and optimization
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## 7. Frontend - Create PDF Viewer Component ✅
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- [x] 7.1 Create `PDFViewer.tsx` component in `components/`
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- [x] 7.2 Implement Document and Page rendering from react-pdf
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- [x] 7.3 Add zoom controls (zoom in/out, 50%-300%)
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- [x] 7.4 Add page navigation (previous, next, page counter)
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- [x] 7.5 Add loading spinner while PDF loads
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- [x] 7.6 Add error boundary for PDF loading failures
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- [x] 7.7 Style PDF container with proper sizing and authentication support
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## 8. Frontend - Results Page Integration ✅
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- [x] 8.1 Import PDFViewer component in ResultsPage.tsx
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- [x] 8.2 Construct PDF URL from task data
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- [x] 8.3 Replace placeholder text with PDFViewer
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- [x] 8.4 Add authentication headers (Bearer token)
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- [x] 8.5 Test PDF preview rendering
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## 9. Frontend - Task Detail Page Integration ✅
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- [x] 9.1 Import PDFViewer component in TaskDetailPage.tsx
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- [x] 9.2 Construct PDF URL from task data
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- [x] 9.3 Replace placeholder text with PDFViewer
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- [x] 9.4 Add authentication headers (Bearer token)
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- [x] 9.5 Test PDF preview rendering
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## 10. Testing ⚠️ (待實際 OCR 任務測試)
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### 基本驗證 (已完成) ✅
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- [x] 10.1 Backend service imports successfully
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- [x] 10.2 Frontend TypeScript compilation passes
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- [x] 10.3 PDF Generator Service loads correctly
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- [x] 10.4 OCR Service loads with image saving updates
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### 功能測試 (需實際 OCR 任務)
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- [x] 10.5 Fixed page filtering issue for tables and images (修復表格與圖片頁碼分配錯誤)
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- [x] 10.6 Adjusted rendering order (images → tables → text) to prevent overlapping
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- [x] 10.7 **Fixed text filtering logic** (使用正確的數據來源 images_metadata，修復文字與表格/圖片重疊問題)
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- [ ] 10.8 Test image extraction and saving (verify imgs/ folder created with correct files)
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- [ ] 10.8 Test image saving with multi-page PDFs
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- [ ] 10.9 Test PDF generation with single-page document
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- [ ] 10.10 Test PDF generation with multi-page document
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- [ ] 10.11 Test Chinese character rendering in PDF
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- [ ] 10.12 Test coordinate accuracy (verify text positioned correctly)
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- [ ] 10.13 Test table rendering in PDF (if JSON contains tables)
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- [ ] 10.14 Test image embedding in PDF (verify images from imgs/ folder appear correctly)
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- [ ] 10.15 Test PDF caching (second request uses cached version)
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- [ ] 10.16 Test automatic PDF generation after OCR completion
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- [ ] 10.17 Test PDF download from Results page
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- [ ] 10.18 Test PDF download from Task Detail page
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- [ ] 10.19 Test PDF preview on Results page
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- [ ] 10.20 Test PDF preview on Task Detail page
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- [ ] 10.21 Test error handling when JSON is missing
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- [ ] 10.22 Test error handling when PDF generation fails
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- [ ] 10.23 Test error handling when image files are missing or corrupt
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