DirPicker mirrors the web filter/picker split: typing narrows and the
next Enter submits with the highlighted project directly (nothing was
chosen yet); an explicit Up/Down move onto a different row is
mid-selection, so Enter there only chooses it and a further Enter (now
the active pick) submits. WorktreeChoice, BranchExisting, Preset and
BranchMode already apply their highlight eagerly on Up/Down/Left/Right,
so Enter always submits there. Advanced and WorktreeToggle keep
activating on Enter, matching the web form's own button controls.
Miguel Palhas
8a6cb81d3a