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- Add app/utils/ocr_language_manager.py: detects tessdata dir, downloads missing .traineddata files via wget/curl from tessdata_fast GitHub repo, pre-downloads EasyOCR models, exposes async background-thread helper - TesseractOCRProvider.process() calls ensure_tesseract_languages() before running pytesseract; raises clear error if languages remain unavailable - EasyOCRProvider.process() logs informational message when models download - app/main.py: calls ensure_ocr_languages_async() at startup - app/utils/settings_sync.py: triggers language re-check after every settings reload so UI changes take effect without container restart - app/api/settings.py: adds POST /api/settings/install-ocr-languages endpoint for on-demand language installation from the admin UI - Dockerfile: adds wget for runtime tessdata downloads - docs/ConfigurationGuide.md: documents automatic language download - tests/test_ocr_language_manager.py: 29 unit tests Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>