fix(insights): suppress recommendation-card hover lift under reduced motion

The recommendation cards carry `transition-all md:hover:-translate-y-0.5`
for a subtle lift on pointer hover. Motion-sensitive users got the full
transform with no opt-out. Pair the hover with
`motion-reduce:transition-none motion-reduce:hover:translate-y-0` so the
card stays put when the user asks for less motion.

src/components/insights/recommendations-grid.tsx

@@ -101,7 +101,7 @@ export function RecommendationsGrid({ recs }: RecommendationsGridProps) {
             }
             data-stagger-index={index}
             role="listitem"
-            className={`animate-insight-in transition-all md:hover:-translate-y-0.5 md:hover:shadow-lg ${borderClass} rounded-lg border-l-2`}
+            className={`animate-insight-in transition-all md:hover:-translate-y-0.5 md:hover:shadow-lg ${borderClass} rounded-lg border-l-2 motion-reduce:transition-none motion-reduce:hover:translate-y-0`}
             style={{ animationDelay: `${index * STAGGER_INTERVAL_MS}ms` }}
           >
             <RecommendationCard rec={rec} index={index} />