Add bidirectional sync between rTasks and ClickUp:
- API client with 100 req/min rate limiter
- OAuth2 + personal API token connection flows
- Import wizard (workspace → space → list picker)
- Outbound push queue (5s intervals, 10-item batches)
- Inbound webhook with HMAC-SHA256 validation
- Field-level conflict detection (rTasks wins)
- Source badges (purple CU) with sync status dots on task cards
- Sync status indicator in board header for connected boards
Also fix 6 pre-existing TS errors across crowdsurf, rcal, rnotes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
