content_roi was cropped to [left_x:right_x] — the detected content boundary.
Words at the right edge of the last column (beyond right_x) were never
found in the initial scan, so they remained missing even after the column
geometry was extended to full image width (w).
Fix: crop to [left_x:w] so all words including those near the right margin
are detected and assigned correctly to the last column.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
f3d61a9394