phase-1: optimize code

src/screener/assets/Asset.js

@@ -0,0 +1,19 @@
+export class Asset {
+  constructor(data) {
+    this.ticker = (data.ticker || 'UNKNOWN').toUpperCase();
+    this.currentPrice = data.currentPrice || 0;
+    this.type = (data.type || 'STOCK').toUpperCase();
+  }
+
+  formatCurrency(val) {
+    return val ? `$${val.toFixed(2)}` : 'N/A';
+  }
+
+  formatLargeNumber(num) {
+    if (!num) return 'N/A';
+    if (num >= 1e12) return `${(num / 1e12).toFixed(2)}T`;
+    if (num >= 1e9) return `${(num / 1e9).toFixed(2)}B`;
+    if (num >= 1e6) return `${(num / 1e6).toFixed(2)}M`;
+    return num.toString();
+  }
+}