test(web): cover collapsing and expanding the question card

Two new QuestionComposer cases: the collapse toggle hides the option list
and leaves the header strip, and collapsing between answering preserves
both the picked draft and the current question position through a full
submit; re-expanding does not steal focus back into the textarea. Refresh
the question-composer and steering web e2e goldens for the new header
button.

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

@@ -1,6 +1,8 @@
 - region "Which color do you prefer?":
   - text: Pick one
   - heading "Which color do you prefer?" [level=2]
+  - button "Collapse the question card" [expanded]:
+    - img
   - button "Dismiss all questions":
     - img
   - group:

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

@@ -1,6 +1,8 @@
 - region "Which color do you prefer?":
   - text: Pick one
   - heading "Which color do you prefer?" [level=2]
+  - button "Collapse the question card" [expanded]:
+    - img
   - button "Dismiss all questions":
     - img
   - group:

apps/web/tests/snapshots/steering/mid-steer.expected.md

@@ -32,6 +32,8 @@
 - region "Ready to continue?":
   - text: Checkpoint
   - heading "Ready to continue?" [level=2]
+  - button "Collapse the question card" [expanded]:
+    - img
   - button "Dismiss all questions":
     - img
   - radiogroup: