Block a user
rename(cleanup): drop last capakraken strings from UI, scripts, schema, tests
Phase 4 cleanup: drop legacy capakraken DB + role after stability window
rename(phase 3): compose/DB/infra + stray code refs capakraken → nexus
rename(phase 3): compose/DB/infra + stray code refs capakraken → nexus
rename(phase 1): CapaKraken → Nexus across code, UI, docs, CI