Initial commit: TaskPool React panel

- React frontend with route-level code splitting
- Backend rebranded from Baihu to TaskPool
- DB brand migration script and local compatibility

web/src/lib/format.ts

@@ -0,0 +1,46 @@
+export function formatDuration(ms?: number | null): string {
+  if (ms == null || Number.isNaN(ms)) return '-'
+  if (ms < 1000) return `${Math.round(ms)}毫秒`
+  if (ms < 60000) return `${(ms / 1000).toFixed(1)}秒`
+  if (ms < 3600000) return `${(ms / 60000).toFixed(1)}分钟`
+  return `${(ms / 3600000).toFixed(1)}小时`
+}
+
+export function formatDateTime(value?: string | null): string {
+  if (!value || value === '-') return '-'
+  const d = new Date(value)
+  if (Number.isNaN(d.getTime())) return value
+  return d.toLocaleString()
+}
+
+/** 简单 cron 说明（6 段秒级或 5 段） */
+export function getCronDescription(expr?: string | null): string {
+  if (!expr?.trim()) return '未设置'
+  const parts = expr.trim().split(/\s+/)
+  if (parts.length < 5) return expr
+  // 常见快捷
+  if (expr === '0 * * * * *' || expr === '* * * * *') return '每分钟'
+  if (expr === '0 0 * * * *' || expr === '0 * * * *') return '每小时'
+  if (expr === '0 0 0 * * *' || expr === '0 0 * * *') return '每天 0 点'
+  if (expr.startsWith('*/')) return `周期: ${expr}`
+  return expr
+}
+
+export function copyToClipboard(text: string): Promise<boolean> {
+  if (navigator.clipboard?.writeText) {
+    return navigator.clipboard.writeText(text).then(() => true).catch(() => false)
+  }
+  try {
+    const ta = document.createElement('textarea')
+    ta.value = text
+    ta.style.position = 'fixed'
+    ta.style.left = '-9999px'
+    document.body.appendChild(ta)
+    ta.select()
+    const ok = document.execCommand('copy')
+    document.body.removeChild(ta)
+    return Promise.resolve(ok)
+  } catch {
+    return Promise.resolve(false)
+  }
+}