Matches the TUI's WorktreeToggle, whose Enter also toggles rather than
submitting — otherwise the two clients would disagree on this one
field despite #97 requiring the same rule everywhere else.
A project-box or worktree-choice picker button that isn't yet the
active pick takes the Enter to choose it instead; the next Enter, once
it's active, submits. The project filter resolves to the top filtered
project rather than sending whatever cwd was last set. The raw-cwd
autocomplete's own Enter (accept the highlight) keeps working via
e.defaultPrevented.
Miguel Palhas