Add frontend backup upload and list-based restore with validation.

Co-authored-by: Cursor <cursoragent@cursor.com>

modules/backup/restore_job.py

@@ -0,0 +1,26 @@
+# Copyright (c) 2025-2026 马建军. All rights reserved.
+"""Detached restore worker — survives pm2 stop of the parent web process."""
+
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+
+def main(argv: list[str] | None = None) -> int:
+    args = argv if argv is not None else sys.argv[1:]
+    if len(args) != 1:
+        print("usage: python -m modules.backup.restore_job <backup.tar.gz>", file=sys.stderr)
+        return 2
+    archive = Path(args[0]).resolve()
+    if not archive.is_file():
+        print(f"backup not found: {archive}", file=sys.stderr)
+        return 1
+    from modules.backup.db_backup import run_restore_job
+
+    run_restore_job(archive)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())