S15 review fixes on top of a584c08ad.
- Breadcrumb: from 700px the project name stops at 40% and a long current
label ellipsizes after it, so a long Conversation title no longer pushes
the page wider than the window. Under 700px the current label is hidden
and the project name shrinks as before.
- Details keeps its size beside a long Conversation title instead of
squeezing to a vertical label (also present on 7c664fac9).
- The active tab is brought fully into the strip after counts load, after
a refresh repaint and when a tab receives keyboard focus.
- Long speaker names wrap between words at narrow zoom; the time stays
whole.
Tests: three new S15 browser tests, red on a584c08ad sources and green
here. S10-S15 each alone 3 times green; webui 952/0/0.