Implement status toggle functionality for contact requests, updating the status display and adding error handling. Enhance the UI with a new button for marking requests as completed or reopening them.

server/utils/contact-requests.js

@@ -77,3 +77,22 @@ export async function addContactReply({ requestId, replyText, responderEmail })
   await writeContactRequests(current)
   return current[index]
 }
+
+export async function updateContactRequestStatus(requestId, newStatus) {
+  const validStatuses = ['offen', 'beantwortet']
+  if (!validStatuses.includes(newStatus)) return null
+
+  const current = await readContactRequests()
+  const index = current.findIndex((r) => r.id === requestId)
+  if (index === -1) return null
+
+  const now = new Date().toISOString()
+  current[index] = {
+    ...current[index],
+    status: newStatus,
+    updatedAt: now
+  }
+
+  await writeContactRequests(current)
+  return current[index]
+}