- layout: _PAD_BOTTOM 100→160, _PAD_LEFT 120→160 to prevent label clipping
- axes: fix _format_tick float-comparison bug (1.1→"1.1" not "1.10");
add auto-rotation for categorical x-axis labels when they overflow slot width
- engine: tick guard (>20 ticks falls back to nice_ticks); stacked_bar falls
back to bar instead of crashing; extend _find_date_column keywords
- series: bar width uses 25th-percentile gap instead of min to avoid invisible bars
- legend: line series use line swatch with dash pattern; proportional square size
- export: @font-face injected in HTML <head> for PDF to prevent T3Font in InDesign
- prompts: add categorical bar chart few-shot example; ban stacked_bar; improve
tick_interval guidance; add bar chart refine examples
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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