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/agent-config-primitives.tsx

@@ -23,7 +23,7 @@ export const help: Record<string, string> = {
   role: "Organizational role. Determines position and capabilities.",
   reportsTo: "The agent this one reports to in the org hierarchy.",
   capabilities: "Describes what this agent can do. Shown in the org chart and used for task routing.",
-  adapterType: "How this agent runs: local CLI (Claude/Codex/OpenCode), OpenClaw webhook, spawned process, or generic HTTP webhook.",
+  adapterType: "How this agent runs: local CLI (Claude/Codex/OpenCode), OpenClaw (HTTP hooks or Gateway protocol), spawned process, or generic HTTP webhook.",
   cwd: "Default working directory fallback for local adapters. Use an absolute path on the machine running Paperclip.",
   promptTemplate: "The prompt sent to the agent on each heartbeat. Supports {{ agent.id }}, {{ agent.name }}, {{ agent.role }} variables.",
   model: "Override the default model used by the adapter.",
@@ -54,6 +54,7 @@ export const adapterLabels: Record<string, string> = {
   codex_local: "Codex (local)",
   opencode_local: "OpenCode (local)",
   openclaw: "OpenClaw",
+  openclaw_gateway: "OpenClaw Gateway",
   cursor: "Cursor (local)",
   process: "Process",
   http: "HTTP",