feat: purge legacy agent hosts and land vault Chrome extension path

Retire ACP/Hermes/OpenCode surfaces and rename hermes_tools to
mnote_agent_tools so Page AI stays on Pi Lab only. Add Chrome vault
extension + extension token route, pre-release purge design, and soft-retire
legacy smokes for the small-group production cut.

scripts/task-editor-runtime-actor-smoke.js

@@ -31,7 +31,7 @@ const OUT_DIR = path.join(process.cwd(), "tmp", "editor-runtime-actor-smoke");
 const SUFFIX = `era-${Date.now().toString(36)}`;
 
 async function callTool(request, payload) {
-  return requestJson(request, "/api/hermes/tools/mnote/call", {
+  return requestJson(request, "/api/mnote/tools/call", {
     method: "POST",
     headers: { "x-mnote-actor-id": payload.actorId || "smoke-user" },
     data: payload,