fix: 修复 oxlint 报告的代码质量问题

tests/cli/map-error.test.ts

@@ -1,11 +1,5 @@
 import { describe, it, expect } from "bun:test";
-import {
-  CliError,
-  UsageError,
-  ConfigError,
-  CommandError,
-  InternalError,
-} from "../../src/cli/errors.ts";
+import { UsageError, ConfigError, InternalError } from "../../src/cli/errors.ts";
 import { mapError } from "../../src/cli.ts";
 
 describe("mapError", () => {

tests/cli/output.test.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect } from "bun:test";
 import { formatError } from "../../src/cli/output.ts";
-import { UsageError, ConfigError, CommandError, InternalError } from "../../src/cli/errors.ts";
+import { UsageError, ConfigError, InternalError } from "../../src/cli/errors.ts";
 
 describe("formatError", () => {
   it("只输出错误行（无 hint/usage）", () => {

tests/integration/flow.test.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect, beforeEach, afterEach } from "bun:test";
 import { existsSync } from "node:fs";
-import { mkdir, writeFile, rm, readFile, rename } from "node:fs/promises";
+import { mkdir, writeFile, rm, rename } from "node:fs/promises";
 import { join } from "node:path";
 import { runInit } from "../../src/commands/init.ts";
 import { loadConfig, getChangeDir, getArchiveDir } from "../../src/core/config.ts";