test(web): pick up the plan chip in the answered composer golden

The always-visible plan-mode toggle (fe9191934) adds one composer-row
button; the answered transcript golden re-records with it.

apps/web/tests/snapshots/question-composer/answered.expected.md

@@ -33,6 +33,7 @@
 - button "Add attachment":
   - img
 - 'button "Access mode, current: Danger Full Access"': Danger Full Access
+- button "Plan mode off, press to turn on": Plan off
 - button "Select model, current DeepSeek-V4-Flash":
   - text: DeepSeek-V4-Flash
   - img