rename(phase 1): CapaKraken → Nexus across code, UI, docs, CI (#61) Co-authored-by: Hartmut Nörenberg <hn@hartmut-noerenberg.com> Co-committed-by: Hartmut Nörenberg <hn@hartmut-noerenberg.com>
Phase 3c continued: covers admin settings CRUD with secret handling, webhook lifecycle with SSRF validation, and calculation rules with controller/manager authorization boundaries. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>