Ship a Zhihu publish adapter that reuses the shared session fetch and
image pipeline: converts markdown to HTML via marked, uploads cover
and inline images through Zhihu's image token flow, creates a draft,
and publishes it, returning external article URLs. Wire it into the
adapter barrel and runtime-controller's publish adapter selector so
Zhihu publish tasks stop falling through to the scaffold result.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
