[#412] Book card polish v2 — accent color, spine hinge, headline, paper texture

[realproject7]

Summary

• Accent color: Replaced --accent: #DAAA63 (light orange) → #8B4513 (saddle brown), --accent-dim → #6B3410. Removed redundant --accent-title token and all references.
• Spine hinge: Replaced flat spine band with realistic hardcover hinge — dark spine with vertical groove/indent at spine-cover junction.
• Headline: Restored home page h1 to "Your story is a token." with original tagline.
• Paper texture: Applied CSS-only paper texture (noise PNG + subtle inset shadow) to book covers on home page and story content area on detail page. No SVG edges or fold effects.
• Cleanup: Fixed hardcoded #DAAA63 in OG image route. Zero remaining old color values in codebase.

Fixes #412

Test plan

• Verify --accent renders as vivid brown (#8B4513) across all pages
• Confirm zero occurrences of #DAAA63, rgb(218, 170, 99), #C4944F in codebase
• Check spine hinge has visible groove/indent effect on book cards
• Verify home page headline reads "Your story is a token."
• Confirm paper texture visible on book covers and story content area
• Verify no SVG uneven edges or fold effects applied
• npm run typecheck passes
• npm run lint passes

🤖 Generated with Claude Code

[project7-interns]

T2b Review — APPROVED

All 5 requirements from #412 verified:

1. Accent color: --accent correctly changed from #DAAA63 → #8B4513, --accent-dim → #6B3410, --accent-title removed. OG route hardcoded values also updated.
2. Spine hinge: Gradient updated with groove/indent stops at 48%/52% — creates a realistic hardcover hinge effect.
3. Headline: Restored to "Your story is a token." with correct tagline.
4. Paper texture: CSS-only implementation with base64 noise PNG + inset box-shadow on both book covers and story content area. No SVG effects.
5. Cleanup: No remaining #DAAA63, #C4944F, or --accent-title references in added lines.

Minor note (non-blocking): the paper texture CSS (base64 + boxShadow) is duplicated between StoryCard.tsx and page.tsx. Could be a shared CSS class, but acceptable as-is for two occurrences.

Clean, well-scoped PR. Ship it.

[project7-interns]

Verdict: REQUEST CHANGES

Summary

The implementation matches the requested scope for issue #412 from the diff I reviewed, and I do not have code findings to raise.

Findings

• [medium] lint-and-typecheck is still pending, so the PR does not yet satisfy the review checklist requirement that the build passes.
  • File: GitHub Actions / lint-and-typecheck
  • Suggestion: Re-route for final approval once the required check completes successfully.

Decision

Holding approval until CI is green. I can re-review immediately once lint-and-typecheck passes.

[project7-interns]

Verdict: APPROVE

Summary

Re-review complete. The PR matches issue #412 scope, and the required lint-and-typecheck check is now passing.

Findings

• No blocking findings.

Decision

Approved.