A finished plan is not a blocked session

Fixed

• A Plan-mode run that finished by handing back a plan no longer lights the amber dot in the sidebar. The run's terminal reason now travels with its status, so a deliberate pause is told apart from a genuine block. A run that is genuinely waiting on you keeps its dot.
• A check that reported neutral or skipped is no longer read as pending, and a neutral required check counts as satisfied. A check with nothing to report offers no disclosure.
• A chat switch that never reaches the screen is written to the app log with the step it is waiting on, so a blank pane can be diagnosed.

New

• A pull request check's findings are shown behind a disclosure. A reviewer bot attaches its findings to the check run, where gh pr checks cannot see them, so they are read from the check-runs API and joined to the row by check name.