feat: add personalized time-based greeting with user name and active prayer count

src/app/page.tsx

@@ -227,6 +227,7 @@ export default function Home() {
           todayCount={prayers.filter(p => p.date === new Date().toISOString().split('T')[0]).length}
           onStartPraying={() => setActiveTab('compose')}
           onSelectPrayer={handleSelectPrayer}
+          userName={user.displayName || user.email || undefined}
         />
       )}