feat(widgets): voeg relativeTime toe in lib/utils, expiringWarning-badge in CaddyWidget

- relativeTime(date: Date) helper toegevoegd aan lib/utils.ts
- AuditWidget gebruikt nu gedeelde relativeTime in plaats van inline functie
- CaddyWidget toont rode badge als soonest cert-expiry <30 dagen
- app/page.tsx berekent expiringWarning voor CaddyInitial

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/_components/AuditWidget.tsx

@@ -3,6 +3,7 @@
 import { useCallback, useEffect, useState } from 'react'
 import Link from 'next/link'
 import { apiFetch } from '@/lib/csrf'
+import { relativeTime } from '@/lib/utils'
 
 type LatestRun = { id: string; flow_key: string; status: string; started_at: string }
 export type AuditInitial =
@@ -17,16 +18,6 @@ const STATUS_STYLES: Record<string, string> = {
   cancelled: 'bg-zinc-100 text-zinc-600 dark:bg-zinc-800 dark:text-zinc-400',
 }
 
-function relativeTime(isoString: string): string {
-  const diff = Date.now() - new Date(isoString).getTime()
-  const minutes = Math.floor(diff / 60_000)
-  if (minutes < 1) return 'zojuist'
-  if (minutes < 60) return `${minutes}m geleden`
-  const hours = Math.floor(minutes / 60)
-  if (hours < 24) return `${hours}u geleden`
-  return `${Math.floor(hours / 24)}d geleden`
-}
-
 async function fetchLatestRun(): Promise<LatestRun | null> {
   const res = await apiFetch('/api/audit/latest')
   if (!res.ok) throw new Error(`${res.status}`)
@@ -66,7 +57,7 @@ export default function AuditWidget({ initial }: { initial: AuditInitial }) {
             >
               {data.status}
             </span>
-            <span className="text-xs text-muted-foreground">{relativeTime(data.started_at)}</span>
+            <span className="text-xs text-muted-foreground">{relativeTime(new Date(data.started_at))}</span>
           </div>
           <p className="font-mono text-xs text-muted-foreground truncate">{data.flow_key}</p>
         </div>

app/_components/CaddyWidget.tsx

@@ -5,7 +5,7 @@ import Link from 'next/link'
 import { parseCertList } from '@/lib/parse-caddy'
 import { fetchAgentOutput } from '@/lib/agent-fetch'
 
-type CaddyData = { soonestExpiryMs: number | null; count: number }
+type CaddyData = { soonestExpiryMs: number | null; count: number; expiringWarning: boolean }
 export type CaddyInitial = { data: CaddyData; error: null } | { data: null; error: string }
 
 async function refreshCaddy(): Promise<CaddyData> {
@@ -15,7 +15,8 @@ async function refreshCaddy(): Promise<CaddyData> {
     .filter((c) => c.notAfter)
     .map((c) => new Date(c.notAfter).getTime())
   const soonestExpiryMs = expiryTimes.length > 0 ? Math.min(...expiryTimes) : null
-  return { soonestExpiryMs, count: certs.length }
+  const expiringWarning = certs.some((c) => c.expiringWarning)
+  return { soonestExpiryMs, count: certs.length, expiringWarning }
 }
 
 function daysUntil(ms: number): number {
@@ -49,10 +50,17 @@ export default function CaddyWidget({ initial }: { initial: CaddyInitial }) {
       ) : data ? (
         <div className="mt-2">
           {data.soonestExpiryMs !== null ? (
-            <p className="text-2xl font-semibold">
-              {daysUntil(data.soonestExpiryMs)}
-              <span className="text-sm font-normal text-muted-foreground"> days to expiry</span>
-            </p>
+            <div className="flex items-center gap-2">
+              <p className="text-2xl font-semibold">
+                {daysUntil(data.soonestExpiryMs)}
+                <span className="text-sm font-normal text-muted-foreground"> dagen tot expiry</span>
+              </p>
+              {data.expiringWarning && (
+                <span className="inline-flex items-center rounded-full px-2 py-0.5 text-xs font-medium bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400">
+                  &lt;30d
+                </span>
+              )}
+            </div>
           ) : (
             <p className="text-sm text-muted-foreground">no certs</p>
           )}

app/page.tsx

@@ -70,6 +70,7 @@ export default async function Home() {
             data: {
               soonestExpiryMs: expiryTimes.length > 0 ? Math.min(...expiryTimes) : null,
               count: certs.length,
+              expiringWarning: certs.some((c) => c.expiringWarning),
             },
             error: null,
           }