People: suppliers and contacts (#153 step 3); Domains: customer can be a supplier, tech contact an analyst (GH #162) Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Contracts with customers (#153): user page, developer guide, roadmap step 1 built, Contracts/Domains/REST API updates
Domains module (#154): user page, developer guide, REST API page; sidebar + Home