Updates nav brand, page <title> blocks across all templates, and the
read-only share view footer. Removes duplicate Roundtable heading from
login card now that the nav wordmark reads correctly.
Reads ROUNDTABLE_<NAME> first, falls back to FABLEDSCRYER_<NAME> so
existing deployments keep working through the rebrand transition.
Covers DATABASE_URL, DATABASE__URL, SECRET_KEY, PLUGIN_DIR, CONFIG.
Meta path finder redirects fabledscryer[.*] imports to roundtable[.*],
keeping unmodified plugin repos working during the rebrand transition.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
bvandeusen