feeds:publish — take handle/password as CLI flags, not env vars
Previously the command read FEED_PUBLISHER_HANDLE and
FEED_PUBLISHER_APP_PASSWORD from the environment, which duplicated
information: FEED_PUBLISHER_DID was already needed by the web process,
and after login the publish command can read the DID straight from the
session.
Now the publish command takes --handle and --password flags. The only
persistent config is FEED_PUBLISHER_DID for the web process, which
keeps credentials out of .env.
https://claude.ai/code/session_01NJ15XWB5biJMu4e3zVHdC7