fix(skills): use brand mark in recovery cards

[iamjr15]

Summary

• replace the two remaining generic Lucide Sparkles icons in skills-catalog recovery cards with CheatcodeMark
• remove the now-unused Sparkles exports from the web icon barrels
• preserve the custom orange onboarding Sparkle artwork and vendored Office schema value

Context

Follow-up to #115 from a direct codebase audit; no Linear issue or plan document was created for this focused cleanup.

Decisions Made

Decision	Choice	Alternatives considered	Reasoning
Skills recovery visual	Reuse CheatcodeMark through the existing RecoveryCard component slot	Keep the generic icon or add a brand-specific mode	Matches onboarding recovery states without duplicating surfaces or adding boolean API modes
Remaining sparkle artwork	Preserve the custom onboarding SVGs	Replace every star-shaped visual	Those SVGs are intentional Paper design-system artwork, not generic Lucide placeholders
Icon barrel	Remove Sparkles entirely	Leave an unused export	Prevents accidental reuse and is verified by the dead-code and repository search checks

How to Review

1. Review integration-skills-grid.tsx for both recovery-state callers.
2. Confirm icons.ts and index.ts only remove the unused Lucide export.

Verification

• repository search finds no Sparkles or lucide-sparkles references
• pnpm lint
• pnpm typecheck
• pnpm turbo build --force
• pnpm deadcode
• pnpm architecture:check
• pnpm turbo skills:build
• local Next.js process started and the Clerk sign-in route returned HTTP 200
• protected /skills visual state was not entered because the browser's autofilled development account is not registered in this Clerk instance; no auth data was created or changed