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feat(training): add segmentation training pipeline and complete Part 6

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- Add /segtrain endpoint to OCR service (ZIP upload, ketos.segtrain,
  backup rotation, in-process model reload)
- Add segtrainModel() to OcrClient and RestClientOcrClient (10-min timeout,
  X-Training-Token header)
- Add SegmentationTrainingExportService: PAGE XML export with polygon
  de-normalization and per-page PNG rendering via PDFBox
- Add GET /api/ocr/segmentation-training-data/export endpoint
- Make TranscriptionBlock.text nullable for segmentation-only blocks
  (V31 migration)
- Add Paraglide i18n translation keys for all training UI strings (de/en/es)
- Pass source prop from TranscriptionEditView to TranscriptionBlock

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Marcel
2026-04-13 15:15:17 +02:00
parent 86e9c05aaf
commit 9b2f91ee59
13 changed files with 383 additions and 5 deletions
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25
frontend/messages/en.json
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@@ -533,5 +533,28 @@
"ocr_status_error": "OCR failed",
"transcription_block_review": "Mark as reviewed",
"transcription_block_unreview": "Unmark as reviewed",
"transcription_reviewed_count": "{reviewed} of {total} reviewed"
"transcription_reviewed_count": "{reviewed} of {total} reviewed",
"training_ocr_heading": "Train Kurrent recognition",
"training_ocr_description": "Start a new training run using the reviewed OCR blocks to improve recognition accuracy for Kurrent script.",
"training_ocr_blocks_ready": "{blocks} reviewed blocks ready / {docs} documents",
"training_ocr_blocks_total": "(of {total} OCR blocks total)",
"training_start_btn": "Start training",
"training_in_progress": "…",
"training_success": "Training started and completed.",
"training_too_few_blocks": "At least 5 reviewed blocks required (currently: {available}).",
"training_service_down": "OCR service is unavailable.",
"training_history_heading": "History",
"training_history_empty": "No training runs yet.",
"training_history_col_date": "Date",
"training_history_col_status": "Status",
"training_history_col_blocks": "Blocks",
"training_history_col_docs": "Documents",
"training_status_done": "Done",
"training_status_failed": "Failed",
"training_status_running": "Running…",
"training_seg_heading": "Train segmentation",
"training_seg_description": "Start a new training run using annotated segmentation regions to improve text detection.",
"training_seg_blocks_ready": "{blocks} segmentation blocks ready",
"training_seg_too_few_blocks": "At least 5 segmentation blocks required (currently: {available}).",
"transcription_block_segmentation_only": "Segmentation only"
}