The bridge routes {type: pow} frames to the panel. contact-main solves
each fresh challenge in the background with the backend-served easypow
solver module (imported by URL from a variable so Rollup leaves it
dynamic), aborting stale solves on replacement challenges. Sending
awaits the current solution and burns it with the message; a
'required' rejection re-solves and retries the message once.
Composer and ContactPanel need no changes: uploads stay ungated, and
the send path just awaits the in-flight solve.
LeoVasanko
0adcd0bf90