For an inbound deployed to a node, the button read the central panel's webCertFile/webKeyFile and inserted paths that don't exist on the node, crashing the node's Xray on startup.
Add a token-accessible GET /panel/api/server/getWebCertFiles that returns a panel's own web cert/key paths, Remote.GetWebCertFiles to fetch it from a node, and GET /panel/api/nodes/webCert/:id to proxy it. setCertFromPanel now calls the node endpoint for a node-assigned inbound and the local settings otherwise, warning instead of inserting wrong paths on error/empty.
Fixes#4854