A profile shows the posts the account pins above its posts (pinned=true: for an account elsewhere, what it features,
which PrivaPub now keeps); the persona pins and unpins its own public and unlisted posts from the card's menu, and
PrivaPub tells its followers. tests/e2e/Actions/PinTests.cs pins from the card and finds the post first on the profile;
the whole e2e suite passes against the reseeded village (122, 4 skipped).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw
