In-transcript look is back to 9e97773 exactly: a live 9-line scrolling
window while the block streams, folding into the last-paragraph teaser
(grey, no chevron, hover brightens) when the stream moves past it.
What changed vs 9e97773: there is no inline expand any more. Clicking a
thinking block opens the FULL text in the right-side panel — the same
slot as the file preview (one occupant at a time, opening either closes
the other). Clicking the same block again toggles the drawer closed.
The panel resolves its text reactively from the transcript, so a block
that is still streaming keeps growing in the drawer and follows the
bottom unless the reader scrolls up; a compaction reload that drops the
turn auto-hides it. Session switches close it like the file preview.
The drawer slides in/out with a 0.28s transform; on leave it floats
fixed over the content (the grid column is already collapsed) so it can
slide away without re-entering the grid. Transition uses an explicit
:duration so a hidden tab (which swallows transitionend) still cleans
up the leaving element by timer.
Re-adds the thinking i18n namespace (panelTitle/close).