A tool-using Transparent Stream turn renders multiple assistant segments
(activity segment(s) then the final answer). Turn metadata — including
_usedModel — is stamped only on the final assistant message, but the
transparent footer read it via turn.querySelector('.assistant-segment'),
which returns the FIRST segment and thus no metadata. Combined with the
generic footer yielding model ownership to transparent mode, the model
label disappeared entirely on exactly the tool turns where per-turn
attribution matters most.
- Add _transparentTurnMetaMessage(turn): scan .assistant-segment
[data-msg-idx] last→first for the final metadata-bearing assistant
message, falling back to the last assistant segment.
- Use it for the transparent footer's duration/model/TTFT/usage instead
of querySelector's first match.
- Non-blocking UX (per gate): preserve the full uncompacted model id in a
hover title on both the transparent .lf-model span and the settled
.msg-used-model-inline chip.
- Tests: behavioral multi-segment harness asserting exactly one .lf-model
(and the correct final-segment metadata + hover title), plus wiring
checks for the segment-scan helper.
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