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ghstats/internal
tiennm99 d0d3862780 feat(card): add contributions area chart card
New 5-contributions.svg renders the last year's contribution calendar
as a monthly smooth-filled area chart. Pure Go SVG; no extra API calls
— one additional contributionCalendar.weeks block in the existing
profile GraphQL query carries the data.

- Y-axis mirrored on both sides with nice ticks.
- X-axis labels in YY/MM format, every other month to avoid overlap.
- Smooth curve via Catmull-Rom interpolation converted to cubic Bezier
  (d3.curveCatmullRom default tension 0.5).
- Missing months between first and last are inserted as zero-count so
  the chart stays time-continuous.
2026-04-18 21:20:52 +07:00
..