feat(search): run a search asked for from the message pane

The panes carry a finished query and know nothing of the query bar; the window
sets the field and calls the existing runner, so the account scope and the
generation counter keep working as they do for a typed query.

Narrowing combines here rather than in a pane, because only the window can see
what the bar currently holds. The tag strip's chips join the header, the body
selection and the details dialog as a fourth surface.

Also fixes the details dialog to actually close when a search is chosen: the
comment above the connection already described this requirement, but nothing
called accept() or reject(), so the dialog stayed open, the query ran behind
it, and the modal exec() never returned. This hung the whole test suite on
QT_QPA_PLATFORM=offscreen once a covering test was added.

0 files changed, 0 insertions, 0 deletions