Fix(brand): Correct the compliance seal's dash ring + arc-text geometry

[allenfbyrd]

A Claude Design QA pass on the Evidentia compliance seal, applied to both the
light and navy variants. Art-only: colors, viewBox (240x240), the mark path,
and the font stack are unchanged.

Three defects fixed

1. Dashed inner ring bunched at 3 o'clock. stroke-dasharray="1.5 6" on an
   r=70 circle (circumference ~439.8) does not divide into a whole number of
   dashes, so the pattern's seam collided with the accent dot.
   Fix: pathLength="120" + stroke-dasharray="0.4 1.6" (exactly 60 uniform
   dashes) + stroke-dashoffset="1", seating a gap under the accent dots at
   3 and 9 o'clock. Renderer-independent — no seam.

2. "POLYCENTRIC LABS" crowded the dotted ring. Bottom text-path r=78 -> 90
   and top r=84 -> 81. Because top glyphs rise outward from their baseline and
   bottom glyphs rise inward, these different radii place both text bands
   centered on the same mid-radius (~r86.5) of the cream-ring(103) /
   dotted-ring(70) channel.

3. "EVIDENTIA" read optically left. Text on a curved baseline is not
   optically centered by its bounding box (arc curvature throws perceived weight
   counter-clockwise). Top startOffset 50% -> 51.3%. The bottom returns to
   50% because its previous 51.8% compensation was tuned for the superseded
   r=78 path.

Notes

• Verified against the shipped SVGs (not just the accompanying note): all three
  fixes present, palette and geometry outside the seal untouched.
• The Evidentia design system's brand card (Claude Design) embeds the seal art
  inline for both variants; it was updated in lockstep so the documented seal
  matches these shipped assets.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
evidentia	Ready	Preview, Comment	Jul 21, 2026 3:38am

[codspeed-hq]

Merging this PR will not alter performance

✅ 6 untouched benchmarks

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_{Comparing brand/seal-fix (9535916) with main (0781948)}