Implement import onboarding integration (Scope C)
Wire import offers into both onboarding paths, add import-aware triage,
import awareness tracking, and chat bar placeholder changes.
- think/awareness.py: add imports section with get_imports(),
record_import(), record_import_offer_declined(), record_import_nudge()
- apps/awareness/call.py: add `sol call awareness imports` CLI command
- think/importers/cli.py: call record_import() on successful completion
- muse/onboarding.md: extend Path B with import offer before completion
- muse/observation_review.md: extend Path A with import offer (new step 5)
- muse/triage.md: add import awareness section for soft nudges
- convey/triage.py: inject import state into triage routing context
- convey/apps.py: import-aware placeholder for new users (day_count < 3)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>