feat(tui): results across the top, with panes you can hide, zoom and Tab through

The results pane now has the whole width, where a long file name needs it,
and Searches, Downloads and Info share the row underneath. Tab and Shift-Tab
walk the panes, z zooms the focused one to the window, w hides it so the
others widen, and its number brings it back. Every list takes the same
navigation keys, the shortcuts bar wraps instead of cutting keys off, and ?
lists every key by pane, scrolling on a short terminal.

Follows up on #55.

website/src/components/tui/panes.tsx

@@ -6,7 +6,7 @@ import { TuiPane } from './chrome'
 import type { ResultRow, SearchRow, TransferRow, TransferStatus } from './data'
 
 const RESULT_COLS = '30px 1fr 74px 92px 78px 74px 42px'
-const TRANSFER_COLS = '48px 1fr 96px 150px 74px'
+const TRANSFER_COLS = '48px 1fr 96px 168px 74px'
 
 interface SearchesPaneProps {
   searches: readonly SearchRow[]