- Compose gains an "Attach file" picker (OpenMultipleDocuments) and shows each pick as
a removable chip; OutgoingMessage carries the picked URIs.
- On send the repository copies the picked files into the outbox message's own cache
directory; SendWorker passes them to SmtpSender, which builds a multipart message
(text body + a part per file via attachFile). Files are cleaned up on success/cancel.
- assemble/test/lint green, including a new SmtpSender test that sends an attachment and
asserts GreenMail received a multipart message containing it; the compose "Attach file"
affordance verified on the Android 17 emulator.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
JMR-devandClaude Opus 4.8
f65226a4d2