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1. Syllable "Original" (auto) mode: only normalize cells that already have | from OCR — don't add new syllable marks via pyphen to words without printed dividers on the original scan. 2. Syllable "Aus" (none) mode: strip residual | chars from OCR text so cells display clean (e.g. "Zel|le" → "Zelle"). 3. Heading detection: add text length guard in single-cell heuristic — words > 4 alpha chars starting lowercase (like "zentral") are regular vocabulary, not section headings. 4. Word-gap merge: new merge_word_gaps_in_zones() step with relaxed threshold (6 chars) fixes OCR splits like "zerknit tert" → "zerknittert". Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>