Three QA-found issues in the approval gate:
- displayState gated the in-session/approval surfaces on hasApproval
before sessionEntered, so moving the list cursor onto a session with a
pending gate auto-opened it, and `l` back-to-list couldn't escape
(the gate re-popped). Require sessionEntered first.
- The band ran every preview through the two-column diff renderer, so a
shell tool's argv JSON rendered as an identical-column "diff". Detect
real unified diffs (isUnifiedDiff); render other previews as plain
text, and drop the ^x fullscreen hint when there's nothing to expand.
- The footer duplicated the band's approve/reject/steer/diff keys. It now
shows navigation (l back / e events / q quit) instead.
kami
b56f0e88ca