first day of vibe coding

lib/utils.ts

@@ -0,0 +1,33 @@
+export function formatPrice(n: number): string {
+  return '$' + n.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })
+}
+
+export function formatPct(n: number): string {
+  const sign = n >= 0 ? '+' : ''
+  return `${sign}${n.toFixed(2)}%`
+}
+
+export function formatHold(seconds: number): string {
+  if (seconds < 60) return `${seconds}s`
+  const h = Math.floor(seconds / 3600)
+  const m = Math.floor((seconds % 3600) / 60)
+  if (h === 0) return `${m}m`
+  if (m === 0) return `${h}h`
+  return `${h}h ${m}m`
+}
+
+export function shortenAddress(addr: string): string {
+  if (addr.length < 10) return addr
+  return `${addr.slice(0, 6)}...${addr.slice(-4)}`
+}
+
+export function sentimentColor(s: string): string {
+  switch (s) {
+    case 'bullish':
+      return '#4ade80'
+    case 'bearish':
+      return '#ef4444'
+    default:
+      return '#555555'
+  }
+}