Force KDocs QR fetch and improve login detection

routes/admin_api/core.py

@@ -863,7 +863,11 @@ def get_kdocs_qr_api():
         from services.kdocs_uploader import get_kdocs_uploader
 
         uploader = get_kdocs_uploader()
-        result = uploader.request_qr()
+        data = request.get_json(silent=True) or {}
+        force = bool(data.get("force"))
+        if not force:
+            force = str(request.args.get("force", "")).lower() in ("1", "true", "yes")
+        result = uploader.request_qr(force=force)
         if not result.get("success"):
             return jsonify({"error": result.get("error", "获取二维码失败")}), 400
         return jsonify(result)