Minimal hand-rolled HTTP/1.1 client over std::net::TcpStream. Plain HTTP in v0; v0.2.0 adds an optional `tls` feature that wires rustls + webpki-roots Mozilla CA bundle so `https://` URLs work via the same `fetch` / `exchange` entry points. No external HTTP crate; framing and parsing are local. No `mut` beyond FFI carve-outs (`TcpStream::read_to_end`, rustls `Stream::new(&mut conn, &mut sock)`). Sixth sub-crate of a Servo-replacement webview runtime targeting Tauri.