The public home page (/) now renders Markdown the Site Admin stores in
the new home.content instance setting, through the same sanitizing
pipeline as the legal pages; empty falls back to the built-in welcome
text. New public GET /home/content, an Admin → Settings editor with
live preview, and an e2e test covering default/configured/escaping/
admin-only.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EwZ4jR4KFAPvpjWevfUGX1
