feat: add openclaw_gateway adapter

New adapter type for invoking OpenClaw agents via the gateway protocol.
Registers in server, CLI, and UI adapter registries. Adds onboarding
wizard support with gateway URL field and e2e smoke test script.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/components/OnboardingWizard.tsx

@@ -56,7 +56,8 @@ type AdapterType =
   | "cursor"
   | "process"
   | "http"
-  | "openclaw";
+  | "openclaw"
+  | "openclaw_gateway";
 
 const DEFAULT_TASK_DESCRIPTION = `Setup yourself as the CEO. Use the ceo persona found here: [https://github.com/paperclipai/companies/blob/main/default/ceo/AGENTS.md](https://github.com/paperclipai/companies/blob/main/default/ceo/AGENTS.md)
 
@@ -672,6 +673,12 @@ export function OnboardingWizard() {
                           desc: "Notify OpenClaw webhook",
                           comingSoon: true
                         },
+                        {
+                          value: "openclaw_gateway" as const,
+                          label: "OpenClaw Gateway",
+                          icon: Bot,
+                          desc: "Invoke OpenClaw via gateway protocol"
+                        },
                         {
                           value: "cursor" as const,
                           label: "Cursor",
@@ -973,14 +980,14 @@ export function OnboardingWizard() {
                     </div>
                   )}
 
-                  {(adapterType === "http" || adapterType === "openclaw") && (
+                  {(adapterType === "http" || adapterType === "openclaw" || adapterType === "openclaw_gateway") && (
                     <div>
                       <label className="text-xs text-muted-foreground mb-1 block">
-                        Webhook URL
+                        {adapterType === "openclaw_gateway" ? "Gateway URL" : "Webhook URL"}
                       </label>
                       <input
                         className="w-full rounded-md border border-border bg-transparent px-3 py-2 text-sm font-mono outline-none focus:ring-1 focus:ring-ring placeholder:text-muted-foreground/50"
-                        placeholder="https://..."
+                        placeholder={adapterType === "openclaw_gateway" ? "ws://127.0.0.1:18789" : "https://..."}
                         value={url}
                         onChange={(e) => setUrl(e.target.value)}
                       />