Developer Docs

Page	Purpose
Plot Registry	How PLOT_REGISTRY maps short names to callables.
Adding A Plot	Checklist for source, registry, docs, and tests.
UI Services	Streamlit-free service boundary.
Project Files	UI project JSON and group rebuild behavior.
Structured Results	Report and describe-layer maintenance.
Testing Map	Which tests protect which subsystem.
Docs Maintenance	How to keep wiki and generated references in sync.