feat(gateway)!: require explicit non-loopback control-ui origins

docs/gateway/configuration-reference.md

@@ -2097,6 +2097,8 @@ See [Plugins](/tools/plugin).
       enabled: true,
       basePath: "/openclaw",
       // root: "dist/control-ui",
+      // allowedOrigins: ["https://control.example.com"], // required for non-loopback Control UI
+      // dangerouslyAllowHostHeaderOriginFallback: false, // dangerous Host-header origin fallback mode
       // allowInsecureAuth: false,
       // dangerouslyDisableDeviceAuth: false,
     },
@@ -2131,6 +2133,8 @@ See [Plugins](/tools/plugin).
 - `auth.rateLimit`: optional failed-auth limiter. Applies per client IP and per auth scope (shared-secret and device-token are tracked independently). Blocked attempts return `429` + `Retry-After`.
   - `auth.rateLimit.exemptLoopback` defaults to `true`; set `false` when you intentionally want localhost traffic rate-limited too (for test setups or strict proxy deployments).
 - `tailscale.mode`: `serve` (tailnet only, loopback bind) or `funnel` (public, requires auth).
+- `controlUi.allowedOrigins`: explicit browser-origin allowlist for Control UI/WebChat WebSocket connects. Required when Control UI is reachable on non-loopback binds.
+- `controlUi.dangerouslyAllowHostHeaderOriginFallback`: dangerous mode that enables Host-header origin fallback for deployments that intentionally rely on Host-header origin policy.
 - `remote.transport`: `ssh` (default) or `direct` (ws/wss). For `direct`, `remote.url` must be `ws://` or `wss://`.
 - `gateway.remote.token` is for remote CLI calls only; does not enable local gateway auth.
 - `trustedProxies`: reverse proxy IPs that terminate TLS. Only list proxies you control.