funman300 dd970215cc fix(engine): drop card-face border to remove gray-corner artifact ...

Player feedback after the 2-colour revert: "I do not like the
grey corners on the cards." The visible artifact was anti-
aliasing physics — the 1 px suit-coloured stroke (red for
hearts/diamonds, near-white for clubs/spades) faded through
gray pixels into the dark play surface at each rounded corner,
producing a visible "gray sliver" at the four arcs of every
card.

Fix: drop the stroke entirely. The card body fill defines the
shape against the play surface; the 5-unit brightness gap
between `#1a1a1a` body and `#151515` surface is enough to read
as a card edge without an explicit stroke. Anti-aliasing on a
fill-only rounded rect blends `#1a1a1a → #151515` over a few
pixels — barely perceptible compared to the
`stroke → transparent` gradient that produced the artifact.

### Changes

- `card_face_svg.rs`: removed `stroke="{colour}" stroke-width="2"`
  from the card body rect. Reverted the 1 px stroke inset back
  to `(x=0, y=0, width=256, height=384)` since there's no
  longer a stroke to keep inside the pixmap. Module-level
  comment updated to document the reasoning.
- `design-system.md` § Game Cards line 225 updated: "Border:
  1px solid in suit color" → "Border: none." with the
  artifact rationale recorded as audit trail.
- `card_face_svg_pin.rs` rebaselined: all 52 face hashes drift
  (every card's perimeter pixels changed); 5 back hashes
  unchanged.

Workspace clippy + cargo test --workspace clean. 1191 passing.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

2026-05-08 12:41:54 -07:00

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