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-block-delta-smoke.js

@@ -27,7 +27,7 @@ const OUT_DIR = path.join(process.cwd(), "tmp", "block-delta-stream-smoke");
 const SUFFIX = `bds-${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,
@@ -105,7 +105,7 @@ async function main() {
     assert.ok(blockB, "文档应包含 B 段");
     const blockBId = blockB.blockId;
 
-    const toolUrl = new URL("/api/hermes/tools/mnote/call", BASE_URL);
+    const toolUrl = new URL("/api/mnote/tools/call", BASE_URL);
     const replaceRes = await requestJson(request, toolUrl.toString(), {
       method: "POST",
       headers: { "x-mnote-actor-id": "smoke-user" },