- add tooltips to all header icons (search, upload, appearance, settings, theme toggle, sidebar trigger)
- fix appearance popover by moving Tooltip outside Popover
- add POST /api/books/export endpoint to zip and download books
- add POST /api/books/bulk-refresh-metadata and bulk-re-extract-cover endpoints
- add BulkBookIdsDto and ExportBooksDto
- add archiver dependency for zip streaming
- update theme CSS variables and component styles across client
- add URI versioning: global prefix changed to api/v1, all frontend call sites updated
- add AbortSignal.timeout to all outbound fetch calls (10s API, 15s scrapers)
- add X-Request-Id response header and requestId field in error payloads
- add response compression via @fastify/compress (gzip + brotli)
- add security headers via @fastify/helmet with CSP for the Vite SPA
- tune pg pool: max 20, idle/connection/statement timeouts on app and migration pools
- add GET /api/v1/health endpoint via @nestjs/terminus with DB connectivity check
neon