init

web/src/lib/utils.ts

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+import { clsx, type ClassValue } from 'clsx'
+import { twMerge } from 'tailwind-merge'
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}
+
+/**
+ * Generate a UUID v4 with fallback for older browsers
+ * Uses crypto.randomUUID() if available, otherwise falls back to manual generation
+ */
+export function generateUUID(): string {
+  // Use native API if available (modern browsers)
+  if (typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function') {
+    return crypto.randomUUID()
+  }
+
+  // Fallback: generate UUID v4 manually
+  // Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
+  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
+    const r = (Math.random() * 16) | 0
+    const v = c === 'x' ? r : (r & 0x3) | 0x8
+    return v.toString(16)
+  })
+}