M5 (Mail lifecycle + incremental sync) is complete and merged to dev; the feature surface (Phases 3 through M5) is now done.
Updates docs/ROADMAP.md, docs/roadmap/index.html, and docs/HANDOFF.md in lockstep to reflect M5 done and M6 (security hardening) as next.
Adds #233 to the open, non-blocking follow-ups alongside #216/#219/#225.
Test plan
cargo fmt --all -- --check / cargo check-all / cargo test-all via pre-commit hook (docs-only change; full gate ran clean)
Manually diffed ROADMAP.md and index.html to confirm no drift in status counts/claims
## Summary
- M5 (Mail lifecycle + incremental sync) is complete and merged to `dev`; the feature surface (Phases 3 through M5) is now done.
- Updates `docs/ROADMAP.md`, `docs/roadmap/index.html`, and `docs/HANDOFF.md` in lockstep to reflect M5 done and M6 (security hardening) as next.
- Adds #233 to the open, non-blocking follow-ups alongside #216/#219/#225.
## Test plan
- [x] `cargo fmt --all -- --check` / `cargo check-all` / `cargo test-all` via pre-commit hook (docs-only change; full gate ran clean)
- [x] Manually diffed ROADMAP.md and index.html to confirm no drift in status counts/claims
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Summary
dev; the feature surface (Phases 3 through M5) is now done.docs/ROADMAP.md,docs/roadmap/index.html, anddocs/HANDOFF.mdin lockstep to reflect M5 done and M6 (security hardening) as next.Test plan
cargo fmt --all -- --check/cargo check-all/cargo test-allvia pre-commit hook (docs-only change; full gate ran clean)