MOREQASSE/CAT8k-SYNC ? reverse-engineered prompt

Build me a desktop app and a local web app for managing a Cisco Catalyst 8000v in one place.

I want it to let me connect to a device, save credentials safely on my machine, then show live telemetry like CPU, memory, interfaces, ARP, and errors. It should also have charts and summaries over time, a way to check config posture and see what changed, and a simple provisioning flow where I can fill in a form or use templates to generate and push config to the device. RESTCONF should be the main way it talks to the router, with SSH, NETCONF, and CLI support when needed.

Please make the desktop version feel like a real management console, and make the web version open locally in a browser or small native window. Add a demo mode too, so I can click around without real hardware. If anything is unclear, look up current docs online and make reasonable choices.