refactor: remove hardcoded example server path

[dsp-ant]

Remove hardcoded path to example server from default args state, replacing with empty string. This makes the initial state more generic and allows users to specify their own server path without preset assumptions.

[jspahrsummers]

The command path is still hardcoded. Did you want to remove that too?

I'm on the fence here generally, because I think it's good to show some example of how to use things here. (For example, knowing that ~/… won't work!)

[ashwin-ant]

I think getting rid of the hardcoded part makes sense. Maybe we can have some example path as the placeholder field on the input instead?

[dsp-ant]

For what it's worth, i saw it happening that when you run an MCP server that just doesn't take any args, the current behaviour is to refill the args with the default, which is kind of frustrating. The description on the input box already says: "Arguments (space-separated)"

[jspahrsummers]

Ah, I think we should just solve that by distinguishing localStorage.getItem("lastArgs") returning an empty string vs. undefined/null.

[jspahrsummers]

Superseded by #49