Add `gog gmail forward` / `gog gmail fwd` with optional notes, verified send-as selection, forwarded headers, thread metadata, and attachment carry-over.
Hardening in this landing pass:
- include forward/fwd in Gmail no-send guard paths
- enforce per-account no-send before any Gmail API fetch/send work
- de-duplicate forwarded header formatting and test service setup
- update README, spec, and changelog
Validation:
- make fmt
- go test ./internal/cmd -run Forward\|NoSend
- make lint && make test && make build
- make ci
- clawdbot live smoke: read-only gmail search/thread get, forward dry-run with real message id, --gmail-no-send forward blocked before send
Co-authored-by: Spencer Reed <spencer.cavendish.reed@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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