refactor: modularize backend and frontend for better maintainability

src/utils/index.ts

@@ -0,0 +1,25 @@
+import { clsx, type ClassValue } from 'clsx';
+import { twMerge } from 'tailwind-merge';
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}
+
+export function formatBytes(bytes: number, decimals = 1) {
+  if (!bytes || bytes === 0) return '0 B';
+  const k = 1024;
+  const dm = decimals < 0 ? 0 : decimals;
+  const sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB'];
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+  return `${parseFloat((bytes / Math.pow(k, i)).toFixed(dm))} ${sizes[i]}`;
+}
+
+export function formatMB(mb: number, decimals = 1) {
+    return formatBytes(mb * 1024 * 1024, decimals);
+}
+
+export function formatDuration(seconds: number) {
+  const m = Math.floor(seconds / 60);
+  const s = Math.floor(seconds % 60);
+  return `${m}:${s.toString().padStart(2, '0')}`;
+}