feat: add dashboard host support

[chethanuk]

Summary

• add configurable host binding for the dashboard server so it can listen on a non-localhost interface when needed
• pass the selected host through the CLI dashboard startup path instead of always binding to 127.0.0.1
• update the dashboard frontend to derive API URLs from the current host and protocol instead of assuming localhost
• use the exported dashboard port constant when deciding between same-origin session requests and cross-port requests

Validation

• cd cli && cargo test
• cd cli && cargo fmt -- --check
• cd cli && cargo clippy
• cd packages/dashboard && pnpm build

[vercel]

@chethanuk is attempting to deploy a commit to the Vercel Labs Team on Vercel.

A member of the Team first needs to authorize it.

[ThomasK33]

I think you'll also need to update:

agent-browser/packages/dashboard/src/store/stream.ts

Line 122 in 510ba72

const ws = new WebSocket(`ws://localhost:${port}`);

[ThomasK33]

Isn't this going to always return ${protocol}//${hostname}:${DASHBOARD_PORT}?