docs(architecture): consolidate domain protocols

src/stores/payment/payment-context.tsx

@@ -1,8 +1,6 @@
 "use client";
 
-/**
- * PaymentContext：基于 XState v5 的 React Context Provider
- */
+/** Route UI reads this projection instead of the Payment machine snapshot. */
 import type { Dispatch, ReactNode } from "react";
 import { createActorContext, shallowEqual } from "@xstate/react";
 import type { SnapshotFrom } from "xstate";