Limit request bodies to 1 MiB (413 JSON), wire aria-describedby on the
login form, add Retry and cancellation to the book form load, disable
Add entry while a note POST is in flight, and poll pg_isready in README.
Claude-Session: https://claude.ai/code/session_01M9MLit5Ko3X4s7rzC5Kv7X
mroberts