v1.2.0

New

• sync --conversation=<id> — sync a single conversation (partial ID OK) without paging the whole inbox. Use this to backfill incomplete threads instead of --force on the full inbox.
• sync --force-bodies — re-download full message bodies even when a local body already exists. Separated from --force so a refresh no longer re-pulls every body by default.

Improved

• Faster sync throttle — removed the hard 1.0s per-request delay. Adaptive throttle starts at ~0.2s, slows only after HTTP 429, and eases back toward 0.1s on success.