40a77a82f6
Replace containment-with-padding approach with midpoint-based column ranges. For adjacent columns, the assignment boundary is the midpoint between them (Voronoi-style). This prevents padding overlap where words near column borders (e.g. "We" at the start of example sentences) were assigned to the preceding column. The last column extends generously to capture all rightmost text. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>