fix(chat): 解决token传输、本地文件存储顺序、读取的问题

tests/utils/fileStore.test.ts

@@ -0,0 +1,33 @@
+import { afterEach, beforeEach, describe, expect, it } from "bun:test";
+import { mkdtemp, readdir, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+import { atomicWriteFile, readTextFile } from "../../src/utils/fileStore.js";
+
+describe("fileStore", () => {
+  const originalDateNow = Date.now;
+  let tempDir: string;
+
+  beforeEach(async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "tjwater-file-store-"));
+  });
+
+  afterEach(async () => {
+    Date.now = originalDateNow;
+    await rm(tempDir, { force: true, recursive: true });
+  });
+
+  it("uses unique temp paths for concurrent writes in the same millisecond", async () => {
+    Date.now = () => 1_801_578_600_000;
+    const path = join(tempDir, "state.json");
+    const values = Array.from({ length: 24 }, (_, index) => `value-${index}`);
+
+    await Promise.all(values.map((value) => atomicWriteFile(path, value)));
+
+    const written = await readTextFile(path);
+    expect(written).not.toBeNull();
+    expect(values).toContain(written as string);
+    expect((await readdir(tempDir)).filter((name) => name.endsWith(".tmp"))).toEqual([]);
+  });
+});