File sync-optimistic.test.ts

packages/app/src/context/sync-optimistic.test.ts:None–None

import { describe, expect, test } from "bun:test"
import type { Message, Part } from "@opencode-ai/sdk/v2/client"
import { applyOptimisticAdd, applyOptimisticRemove, mergeOptimisticPage } from "./sync"