Fix the clipped answer field + the doubled AI note; ordering only where it fits

UI bug from a phone screenshot (short answer, Czech):
- The textarea was flex-shrunk inside the slide's column (58px instead of
  ~82px), clipping the typed answer mid-line. Every direct child of a
  study/review/guide slide is now shrink-0 and the slide scrolls instead.
- Two AI disclaimers were visible at once: the activity's own after the
  grading box plus the feed's row. The activity-level copy is gone; the
  feed/guide row (which also carries the report control) is the single one.
  The phase-2 check now asserts the note sits below the graded feedback.
- The mobile suite's backdrop-tap check is deterministic too (the spring
  animation made the measured box mid-flight).

Ordering activities: the deck prompt now allows them only when the notes
hold a real sequence (chronological events, process stages, procedure steps,
a lifecycle, a ranked scale) and points at matching / multiple choice /
true-false when they do not - "sort these" was landing on decks with no
order at all.

Version 0.2.4, SW -> freezmo-v57.

components/StudyFeed.tsx

@@ -315,7 +315,7 @@ export function StudyFeed({ deck }: { deck: Deck }) {
             aria-label={t("feed.activityOf", { n: activityIndex + 1, total })}
             className="flex h-full snap-start snap-always items-stretch justify-center overflow-y-auto overscroll-y-contain"
           >
-            <div className="mx-auto flex min-h-full w-full max-w-xl flex-col gap-4 px-4 pb-24 pt-24 [justify-content:safe_center]">
+            <div className="mx-auto flex min-h-full w-full max-w-xl flex-col gap-4 px-4 pb-24 pt-24 [justify-content:safe_center] [&>*]:shrink-0">
               <ActivityRenderer
                 activity={activity}
                 active={index === activityIndex}
@@ -353,7 +353,7 @@ export function StudyFeed({ deck }: { deck: Deck }) {
           aria-label={t("feed.results")}
           className="h-full snap-start snap-always overflow-y-auto overscroll-y-contain"
         >
-          <div className="mx-auto flex min-h-full w-full max-w-xl flex-col gap-4 px-4 pb-24 pt-24 [justify-content:safe_center]">
+          <div className="mx-auto flex min-h-full w-full max-w-xl flex-col gap-4 px-4 pb-24 pt-24 [justify-content:safe_center] [&>*]:shrink-0">
             <ResultsScreen
               deck={currentDeck}
               xp={xp}