test(web): re-record the goldens for where this layer puts the preset

The lower layer names the preset in the session header; this one moves the
choice to the new-session chip and leaves the header a read-only label, so the
merged goldens carried a label these screens no longer show.

apps/web/tests/snapshots/subagent-conversation/ui.expected.md

@@ -42,7 +42,6 @@
 - button "Commands":
   - img
 - 'button "Access mode, current: Workspace Write"': Workspace Write
-- text: standard
 - button "6% of context used"
 - button "Send message" [disabled]
 - text: 2 turns · 2 steps LLM {{duration}} TTFT avg {{duration}} · {{throughput}} tok/s Cache hit 99% Input 15.6K tok · Output 158 tok