Finalize: CLAUDE.md, report viewer, tsconfig, type fixes
- Update CLAUDE.md with full project structure and conventions
- Add report viewer page: score ring, WCAG compliance cards, issue list with severity filter, next steps, export + auto-fix buttons, real-time polling
- Add Alembic script.py.mako template (required for alembic revision --autogenerate)
- Add frontend/tsconfig.json + postcss.config.js (Next.js build requirements)
- Fix TypeScript error in supabase/server.ts (explicit CookieOptions type)
- Upgrade Next.js 15.3.2 → 15.5.18 (cache poisoning CVE fix)
- Update .gitignore: frontend build artifacts, backend venv, tsbuildinfo
TypeScript: 0 errors (npx tsc --noEmit passes)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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