Add bind-host assessment that refuses 0.0.0.0/:: without override,
warns on non-loopback binds, and documents internal-only MVP serving.
Health endpoint exposes deployment metadata; docs cover Access/VPN/WARP
and runtime env assumptions without embedding secrets in the client.
Closes#435
Starlette read-only MVP with shared layout, /health JSON liveness, and
route stubs for projects, prompts, runtime, audit, worktrees, and leases.
Includes scripts/run-webui, docs/webui-local-dev.md, and tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>