Agent Skills: ring:planning-frontend-refactor

Planning a frontend refactor: audits an existing React/Next.js frontend against Ring standards (architecture, Sindarian UI, accessibility, testing) and produces a prioritized task list (findings.md + tasks.md) for ring:running-dev-cycle-frontend. Plans only — no edits. Use when an existing frontend needs to meet standards or an audit is requested. Skip for greenfield, single-file fixes, or backend (use ring:planning-backend-refactor).