New crate crates/maestro-web/: axum server that
* embeds the web/dist SPA bundle via include_dir! (graceful placeholder when
pnpm build hasn't run yet — keeps fresh checkouts compiling)
* reverse-proxies /api/* HTTP to a co-located daemon (default
http://127.0.0.1:7070) via reqwest, stripping hop-by-hop headers
* reverse-proxies /api/attach/:id and /api/events WebSockets via
tokio_tungstenite::connect_async + a tokio task pumping both directions
* reads bind_addr / daemon_url / dev_proxy_target from the new [web]
config section; env-var overrides MAESTRO_WEB_BIND_ADDR / _DAEMON_URL /
_DEV_PROXY_TARGET
Integration tests spin up a mock daemon + maestro-web pair on random ports
and verify HTTP forward, SPA fallback, WS echo, and 502 on unreachable
daemon.
Adds a top-level Justfile (`just web` = pnpm install + pnpm build + cargo
build), crates/maestro-web/README.md (config + trust model + dev workflow),
and a docs/INSTALL.md section on optional web UI install.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
