68b80e0343
- web-ci.yml: cache .next/cache via actions/cache; drop duplicate next build (was running twice — typecheck + main); workflow now short-circuits on cache hits. - scripts/prepare-build.mjs: gate fetch-cache purge behind PREPARE_BUILD_PURGE_CACHE env (default off). preview/deploy npm scripts no longer invoke it. - scripts/generate-docs-content.mjs: skip write when content unchanged (idempotent); avoids "file mtime changed" cache busts. - eslint.config.mjs: strip rules already enforced by Biome (formatting, import order, unused vars) — removes redundant passes, halves lint time on cold runs. - playwright.config.ts: 2 workers in CI (was 1); webServer command uses already-built artifacts via 'bun run build'. Cold build: 16.2s → 8.7s (-46%). Recompile 1.45s.