feat: implement file deletion functionality and enhance deployment script

frontend/app/files/[token]/DeleteFileButton.tsx

@@ -0,0 +1,55 @@
+"use client";
+
+import { useState } from "react";
+import { useRouter } from "next/navigation";
+
+export default function DeleteFileButton({ token, name }: { token: string; name: string }) {
+  const router = useRouter();
+  const [loading, setLoading] = useState(false);
+
+  async function handleDelete() {
+    if (!confirm(`Delete "${name}"?\n\nThis permanently removes the file and cannot be undone.`)) return;
+    setLoading(true);
+    try {
+      const res = await fetch(`/api/files/${token}`, { method: "DELETE" });
+      if (res.ok) {
+        router.push("/browse");
+        router.refresh();
+      } else {
+        const data = await res.json().catch(() => ({})) as { error?: string };
+        alert(data.error ?? `Delete failed (${res.status})`);
+      }
+    } catch {
+      alert("Network error – could not delete file");
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  return (
+    <button
+      onClick={handleDelete}
+      disabled={loading}
+      className="flex w-full items-center justify-center gap-2.5 rounded-xl border py-3 text-sm font-semibold transition-all disabled:opacity-50"
+      style={{
+        borderColor: "rgba(239,68,68,0.3)",
+        background: "rgba(239,68,68,0.06)",
+        color: "#fca5a5",
+      }}
+    >
+      {loading ? (
+        <>
+          <span className="w-4 h-4 rounded-full border border-rose-400 border-t-transparent animate-spin" />
+          Deleting…
+        </>
+      ) : (
+        <>
+          <svg viewBox="0 0 24 24" className="w-4 h-4" fill="none" stroke="currentColor" strokeWidth="2" aria-hidden="true">
+            <path strokeLinecap="round" strokeLinejoin="round" d="M14.74 9l-.346 9m-4.788 0L9.26 9m9.968-3.21c.342.052.682.107 1.022.166m-1.022-.165L18.16 19.673a2.25 2.25 0 01-2.244 2.077H8.084a2.25 2.25 0 01-2.244-2.077L4.772 5.79m14.456 0a48.108 48.108 0 00-3.478-.397m-12 .562c.34-.059.68-.114 1.022-.165m0 0a48.11 48.11 0 013.478-.397m7.5 0v-.916c0-1.18-.91-2.164-2.09-2.201a51.964 51.964 0 00-3.32 0c-1.18.037-2.09 1.022-2.09 2.201v.916m7.5 0a48.667 48.667 0 00-7.5 0" />
+          </svg>
+          Delete file
+        </>
+      )}
+    </button>
+  );
+}

frontend/app/files/[token]/page.tsx

@@ -1,7 +1,9 @@
 import Link from "next/link";
 import { getFile } from "@/lib/store";
 import { notFound } from "next/navigation";
+import { getSession } from "@/lib/session";
 import CopyLinkButton from "./CopyLinkButton";
+import DeleteFileButton from "./DeleteFileButton";
 
 function formatBytes(n: number) {
   if (n < 1024) return `${n} B`;
@@ -24,8 +26,9 @@ export default async function FileDetailPage({
   params: Promise<{ token: string }>;
 }) {
   const { token } = await params;
-  const record = await getFile(token);
+  const [record, session] = await Promise.all([getFile(token), getSession()]);
   if (!record) notFound();
+  const isAdmin = session?.role === "admin";
 
   const isBackerup = record.type === "backerup";
   const downloadUrl = `/api/files/${token}/download`;
@@ -138,6 +141,10 @@ export default async function FileDetailPage({
 
         <CopyLinkButton token={token} />
 
+        {isAdmin && (
+          <DeleteFileButton token={token} name={title} />
+        )}
+
         <Link
           href="/browse"
           className="flex w-full items-center justify-center gap-2 rounded-xl border border-white/8 bg-white/3 py-3 text-sm font-medium text-slate-400 hover:text-white hover:bg-white/6 transition-all"