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Two fixes for edge case where residual shear pushes content out of narrow columns (marker, page_ref): 1. Column expansion (Step 10): After detection, narrow columns (<10% content width) expand into adjacent whitespace gaps, claiming up to 40% of the gap but never past the nearest word in the neighbor column. This gives marker/page_ref columns breathing room. 2. Dewarp sensitivity: Lower minimum angle from 0.15° to 0.08°, lower ensemble min confidence from 0.5 to 0.35, lower final threshold from 0.5 to 0.4, and skip quality gate for small corrections (<0.5°) where projection variance change is negligible. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>