Has there been any discussion on a web dashboard for SGP?

Has there been discussion? Yes. Ken and Jared have both said, essentially, that they desire that control be handled through the UI, rather than the API :

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Now, FWIW, there’s “enough” in the existing API to at least present a dashboard of sorts, if you want to have a sort of “quick glance” at what SGP is doing. I rigged something up a couple years ago that includes a “module” with some basic SGP status info (Connected to simulators here to demonstrate):

The API DOES have a few endpoints for control…you can connect and disconnect devices, do some guider stuff, slew and park a scope, solve images, etc. So there’s certainly enough there to provide some interactivity, and extend beyond the “quick status glance” I’ve shown here. I don’t think there’s really enough there to present a fully functional web control interface, however.