Replace keyboard emojis with the app's own lucide icons (quiz reactions, +XP, welcome hand, party popper, streak flame)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/screens/StreakScreen.tsx

@@ -102,7 +102,7 @@ function StreakGoal({ current }: { current: number }) {
   return (
     <div className="rounded-3xl border border-line bg-[#FFF3E8] px-4 py-3">
       <p className="text-sm font-black leading-7 text-ink">
-        {reached ? `🔥 ${toFa(current)} روزه‌ای! ` : ''}
+        {reached ? <><Flame size={16} fill="#FF7A3D" className="mb-0.5 ml-1 inline text-orange" />{toFa(current)} روزه‌ای! </> : null}
         {next ? `${toFa(next - current)} روز دیگه می‌شه زنجیره‌ی ${toFa(next)} روزه.` : 'از همه‌ی نقطه‌عطف‌ها رد شدی، افسانه‌ای!'}
       </p>
       {next && (