Documents the 2026-05-03 session covering registry page crashes,
logout 405, wrong password hash format, and the left sidebar
navigation refactor. Includes wall-clock profiling per build and
five improvement suggestions (GHCi loop, Nix cache, package split,
Tailwind safelist, IHP NameSupport rename strategy).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>