Serverpuls: Admin-Seite mit Verlauf und Warnungen

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/lib/serverpulsFormat.js

@@ -0,0 +1,58 @@
+// Reine Format-Helfer fuer die Serverpuls-Seite (kein React, unter Node testbar).
+const nf = (digits) =>
+  new Intl.NumberFormat('de-DE', { minimumFractionDigits: 0, maximumFractionDigits: digits })
+
+const UNITS = ['B', 'KB', 'MB', 'GB', 'TB', 'PB']
+
+export function formatBytes(n) {
+  if (n === null || n === undefined || Number.isNaN(Number(n))) return '–'
+  let v = Math.abs(Number(n))
+  if (v < 1) return '0 B'
+  let i = 0
+  while (v >= 1024 && i < UNITS.length - 1) {
+    v /= 1024
+    i += 1
+  }
+  const sign = n < 0 ? '−' : ''
+  return `${sign}${nf(i === 0 ? 0 : 1).format(v)} ${UNITS[i]}`
+}
+
+export function formatDelta(pct) {
+  if (pct === null || pct === undefined || Number.isNaN(Number(pct))) {
+    return { text: '–', dir: 'flat' }
+  }
+  const rounded = Math.round(Number(pct) * 10) / 10
+  if (rounded === 0) return { text: '0 %', dir: 'flat' }
+  const sign = rounded > 0 ? '+' : '−'
+  return { text: `${sign}${nf(1).format(Math.abs(rounded))} %`, dir: rounded > 0 ? 'up' : 'down' }
+}
+
+export const STALE_MS = 15 * 60 * 1000
+
+export function ageLabel(ts, now = Date.now()) {
+  if (ts === null || ts === undefined) return { text: 'keine Messung', stale: true }
+  const diff = Math.max(0, now - ts)
+  const min = Math.floor(diff / 60000)
+  let text
+  if (min < 1) text = 'gerade eben'
+  else if (min < 60) text = `vor ${min} Min.`
+  else if (min < 1440) text = `vor ${Math.floor(min / 60)} Std.`
+  else text = `vor ${Math.floor(min / 1440)} T.`
+  return { text, stale: diff > STALE_MS }
+}
+
+// RAM: value ist FREIER Speicher, belegt = 1 - frei/gesamt (in Prozent).
+export function usedPct(free, total) {
+  if (free === null || free === undefined || !total) return null
+  return Math.round((1 - free / total) * 1000) / 10
+}
+
+export function formatPct(v, digits = 1) {
+  if (v === null || v === undefined) return '–'
+  return `${nf(digits).format(v)} %`
+}
+
+export function formatNumber(v, digits = 2) {
+  if (v === null || v === undefined) return '–'
+  return nf(digits).format(v)
+}