fix: eliminate chart, bar, and button layout transitions across all dashboard components

src/app/dashboard/ai-coach/page.tsx

@@ -119,7 +119,7 @@ export default function AICoachDashboard() {
           { label: "Mistakes Mastered", value: mistakesMastered, color: "text-green-400", bg: "bg-green-400/5", border: "border-green-400/20", icon: <CheckCircle2 size={32} /> },
           { label: "AI Sessions", value: aiSessions, color: "text-purple-400", bg: "bg-purple-400/5", border: "border-purple-400/20", icon: <Bot size={32} /> },
         ].map((stat) => (
-          <Card key={stat.label} className={`border ${stat.border} ${stat.bg} backdrop-blur-sm transition-all duration-300 transform hover:-translate-y-1 rounded-2xl`}>
+          <Card key={stat.label} className={`border ${stat.border} ${stat.bg} backdrop-blur-sm rounded-2xl`}>
             <CardContent className="p-6 flex flex-col items-center justify-center text-center">
               <div className="text-3xl mb-2 filter drop-shadow-md">{stat.icon}</div>
               <div className={`text-4xl font-black ${stat.color} leading-none tracking-tight mb-2 filter drop-shadow-sm`}>{stat.value}</div>