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OCR/openspec/changes/archive/2025-12-11-remove-unused-code/specs/document-processing/spec.md
egg cfe65158a3 feat: enable document orientation detection for scanned PDFs 
- Enable PP-StructureV3's use_doc_orientation_classify feature
- Detect rotation angle from doc_preprocessor_res.angle
- Swap page dimensions (width <-> height) for 90°/270° rotations
- Output PDF now correctly displays landscape-scanned content

Also includes:
- Archive completed openspec proposals
- Add simplify-frontend-ocr-config proposal (pending)
- Code cleanup and frontend simplification

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2025-12-11 17:13:46 +08:00

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REMOVED Requirements

Requirement: Legacy OCR Service Implementation

Reason: ocr_service_original.py was the original OCR service implementation that has been completely superseded by the current ocr_service.py. The legacy file is no longer referenced by any part of the codebase.

Migration: No migration needed. The current ocr_service.py provides all required functionality with improved architecture.

Scenario: Legacy service file removal

  • WHEN the legacy ocr_service_original.py file is removed
  • THEN the system continues to function normally using ocr_service.py
  • AND no import errors occur in any service or router

Requirement: Unused Preprocessor Service

Reason: preprocessor.py was a document preprocessor that is no longer used. Its functionality has been absorbed by layout_preprocessing_service.py.

Migration: No migration needed. The preprocessing functionality is available through layout_preprocessing_service.py.

Scenario: Preprocessor file removal

  • WHEN the unused preprocessor.py file is removed
  • THEN the system continues to function normally
  • AND layout preprocessing works correctly via layout_preprocessing_service.py

Requirement: Unused PDF Font Manager

Reason: pdf_font_manager.py was intended for font management but is not referenced by pdf_generator_service.py or any other service.

Migration: No migration needed. Font handling is managed within pdf_generator_service.py directly.

Scenario: Font manager file removal

  • WHEN the unused pdf_font_manager.py file is removed
  • THEN PDF generation continues to work correctly
  • AND fonts are rendered properly in generated PDFs

Requirement: Legacy Frontend Components

Reason: MarkdownPreview.tsx and ResultsTable.tsx are frontend components that are not referenced by any page or component in the application.

Migration: No migration needed. MarkdownPreview functionality is not currently used. ResultsTable functionality has been replaced by TaskHistoryPage.

Scenario: Unused frontend component removal

  • WHEN the unused MarkdownPreview.tsx and ResultsTable.tsx files are removed
  • THEN the frontend application compiles successfully
  • AND all pages render and function correctly

Requirement: Legacy API Client Migration

Reason: services/api.ts and types/api.ts are legacy API client files with only 2 remaining references. These should be migrated to apiV2 for consistency.

Migration:

  1. Move ExportRule type to types/apiV2.ts
  2. Add export rules API functions to services/apiV2.ts
  3. Update SettingsPage.tsx and Layout.tsx to use apiV2
  4. Remove legacy api.ts files

Scenario: Legacy API client removal after migration

  • WHEN the legacy api.ts files are removed after migration
  • THEN all API calls use the unified apiV2 client
  • AND SettingsPage export rules functionality works correctly
  • AND Layout logout functionality works correctly