drawInTile previously stroked each cell's full perimeter, double-drawing
every interior gridline; visible now that the rich-data chat bubble uses
tableBorderColor at 0.25 alpha. Stroking each segment in its own
strokePath call would also have left ~1pt² overdraw at every interior
4-cell junction (where a horizontal divider crosses a vertical one) and
at every T-junction with the outer rounded rect — each strokePath
rasterizes independently and composites against the previous result.
Build a single CGMutablePath containing each cell's interior top/left
segment (skipping cells on the table's top/left boundary) plus the outer
rounded perimeter rect, and call strokePath once. CGContextStrokePath
fills the union of all stroke geometries as a single fill op, so each
pixel is painted exactly once regardless of how many segments overlap.
Empty cells (text == nil) are no longer skipped wholesale: their fill
and text remain gated on text != nil (preserves today's no-fill-for-
empty behavior), but their interior divider segments still get appended
so divider continuity is preserved around them.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
