feat: add dnsmasq DNS record admin UI

- store records in SQLite via built-in node:sqlite, no native deps
- wrap DB reads in await io() so they stay out of the static shell
- add CRUD pages backed by Server Actions with per-request data
- generate managed config and restart container via Docker socket
- add /resolve page to query dnsmasq for A and CNAME records
- add Dockerfile and compose setup with shared config volume

app/records/_components/DeleteButton.tsx

@@ -0,0 +1,14 @@
+"use client"
+
+export function DeleteButton() {
+  return (
+    <button
+      type="submit"
+      onClick={(event) => {
+        if (!window.confirm("确定要删除这条记录吗？")) event.preventDefault()
+      }}
+      className="text-sm text-red-600 transition-opacity hover:opacity-70 dark:text-red-400">
+      删除
+    </button>
+  )
+}