fix: note gatewayUrl param in control ui (#1342) (thanks @ameno-)

Adds support for passing `gatewayUrl` as a URL parameter to the WebChat UI,
allowing the control-ui to connect to a remote gateway (e.g., VPS) instead
of defaulting to localhost.

Usage: http://localhost:5173/?gatewayUrl=ws://<vps-ip>:18789&token=<token>

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -32,6 +32,7 @@ Docs: https://docs.clawd.bot
 - Gateway: reschedule per-agent heartbeats on config hot reload without restarting the runner.
 - UI: keep config form enums typed, preserve empty strings, protect sensitive defaults, and deepen config search. (#1315) — thanks @MaudeBot.
 - UI: preserve ordered list numbering in chat markdown. (#1341) — thanks @bradleypriest.
+- UI: allow Control UI to read gatewayUrl from URL params for remote WebSocket targets. (#1342) — thanks @ameno-.
 - Web search: infer Perplexity base URL from API key source (direct vs OpenRouter).
 - TUI: keep thinking blocks ordered before content during streaming and isolate per-run assembly. (#1202) — thanks @aaronveklabs.
 - TUI: align custom editor initialization with the latest pi-tui API. (#1298) — thanks @sibbl.

ui/src/ui/app-settings.ts

@@ -62,6 +62,7 @@ export function applySettingsFromUrl(host: SettingsHost) {
   const tokenRaw = params.get("token");
   const passwordRaw = params.get("password");
   const sessionRaw = params.get("session");
+  const gatewayUrlRaw = params.get("gatewayUrl");
   let shouldCleanUrl = false;
 
   if (tokenRaw != null) {
@@ -94,6 +95,15 @@ export function applySettingsFromUrl(host: SettingsHost) {
     }
   }
 
+  if (gatewayUrlRaw != null) {
+    const gatewayUrl = gatewayUrlRaw.trim();
+    if (gatewayUrl && gatewayUrl !== host.settings.gatewayUrl) {
+      applySettings(host, { ...host.settings, gatewayUrl });
+    }
+    params.delete("gatewayUrl");
+    shouldCleanUrl = true;
+  }
+
   if (!shouldCleanUrl) return;
   const url = new URL(window.location.href);
   url.search = params.toString();