The repo-switch busy query must not count view-buffer content rendering:
those tasks paint a view rather than drive a git operation, so leaving
one running across a switch is harmless (the switch's own refresh
re-renders). More importantly, they fire on nearly every focus/selection
change — including the context activation that runs right before a
menu/prompt confirmation handler (e.g. confirming worktree creation).
A synchronous busy check in such a handler would otherwise see that
render and make the very switch the handler is about to request refuse
itself.
Route ViewBufferManager's tasks through a new gocui NewBackgroundTask so
they're tracked for idle detection but excluded from the busy query. The
task "background" flag now covers two kinds of non-blocking work: the
background routines (and their refreshes) tagged earlier, and view
rendering.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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