- _merge_inline_marker_columns: skip merge when ≥50% of words are alphabetic (preserves "to", "in", "der" columns) - Rule 2 (oversized stub): widen to ≤3 words / ≤5 chars (catches "SEA &") - IPA phonetics: map longest-avg-text column to column_en so fix_cell_phonetics runs in the grid editor - ocr_pipeline_overlays: add missing split_page_into_zones import Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>