13 bite-sized tasks with TDD on the Rust side (migrations + cascade flag + list_recent_completions query + 4 storage tests) and incremental frontend wiring (store, sparkline component, Tasks header badge, event dispatches, settings toggle). Verification pass + roadmap and HANDOVER update as final tasks. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>