fix: 替换所有测试文件的 rm 为 retryRm，修复 Windows EBUSY

tests/integration/flow.test.ts

@@ -1,6 +1,7 @@
 import { describe, it, expect, beforeEach, afterEach } from "bun:test";
 import { existsSync } from "node:fs";
-import { mkdir, writeFile, rm, rename } from "node:fs/promises";
+import { mkdir, writeFile, rename } from "node:fs/promises";
+import { retryRm } from "../helpers/cleanup.ts";
 import { join } from "node:path";
 import { runInit } from "../../src/commands/init.ts";
 import { loadConfig, getChangeDir, getArchiveDir } from "../../src/core/config.ts";
@@ -20,7 +21,7 @@ beforeEach(async () => {
 });
 
 afterEach(async () => {
-  await rm(TMP_DIR, { recursive: true, force: true });
+  await retryRm(TMP_DIR);
 });
 
 describe("完整 SDD 流程", () => {