Network stats: allow selecting interface and display mode

Problem The new network stats on the server dashboard seem to monitor a fixed interface (probably the first one detected). In my case, it shows a few bytes/s while my actual traffic runs on a different interface, making the stat unusable. Also, only real-time bandwidth is shown — the previous "total traffic" view (still useful for tracking cumulative usage) is gone. Request In the network stat settings (hover menu), add:

Interface selector — pick which network interface to monitor (eth0, ens3, etc.) Display mode toggle — real-time bandwidth or total traffic

Would be great to have the same options on individual services too, for consistency. Why I run streaming apps where bandwidth matters more than CPU/RAM. Monitoring the right interface, and switching between live and cumulative views depending on context, would make this stat genuinely useful.