refactor(core): 重命名多个文件及其引用路径以统一命名规范

- 将核心模块文件名改为短横线风格（kebab-case）
- 更新所有相关导入路径以匹配重命名后的文件名
- 修改测试文件名和对应引用路径，保持一致性
- 调整部分组件及钩子中的类型导入路径
- 无业务功能变更，仅代码结构及命名优化

Author: hqwlkj

src/cli.tsx

@@ -1,7 +1,7 @@
 import React from "react";
 import { render } from "ink";
 import { setShellIfWindows } from "./common/system/shell-utils";
-import { checkForNpmUpdate, promptForPendingUpdate, type PackageInfo } from "./common/updateCheck";
+import { checkForNpmUpdate, promptForPendingUpdate, type PackageInfo } from "./common/update-check";
 import { AppContainer } from "./ui";
 
 const args = process.argv.slice(2);

src/common/updateCheck.ts src/common/update-check.tssrc/common/updateCheck.ts renamed to src/common/update-check.ts

@@ -10,7 +10,7 @@ import {
   replaceCurrentFileMentionToken,
   scanFileMentionItems,
   type FileMentionItem,
-} from "../ui/core/fileMentions";
+} from "../ui/core/file-mentions";
 
 test("getCurrentFileMentionToken detects bare @file tokens under the cursor", () => {
   assert.deepEqual(getCurrentFileMentionToken({ text: "review @src/app.ts please", cursor: 10 }), {