Update from Ilya's review with ChatGPT. This supersedes the blocking behavior in the original report.
Posting should happen immediately. If signing is not ready or fails, publish as Guest rather than make the user wait or prevent publication. Imperfect attribution is preferable to losing the post.
After initial page load, warm the signing code and selected identity in the background without delaying page rendering. The warm-up failure path remains a hypothesis to investigate, not a confirmed cause.
Preserve private ownership continuity with the original cookie session on Guest submissions. Capture the intended identity fingerprint when available. Later, someone who still controls that session should be able to sign the post and claim attribution; when an intended fingerprint was recorded, require that same fingerprint. Do not expose session secrets in public post records.
Acceptance: test early submission, delayed/failed signing assets and short/long posts; posting remains immediate, Guest ownership survives, and a valid later signature permits attribution while unrelated sessions/keys cannot claim it. These are agreed requirements, not a report that the mechanism is already implemented.