Block a user
feat(timeline): start at today + infinite scroll into the past
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