refactor: 测试文件改为导入源码函数，添加 import.meta.main 保护

tests/scripts/release.test.ts

@@ -1,31 +1,5 @@
 import { describe, it, expect } from "bun:test";
-
-function parseSemver(version: string): { major: number; minor: number; patch: number } {
-  const parts = version.split(".");
-  if (parts.length !== 3) {
-    throw new Error(`无效的版本号格式: ${version}`);
-  }
-  const [major, minor, patch] = parts.map((p) => {
-    const n = Number(p);
-    if (Number.isNaN(n) || !Number.isInteger(n) || n < 0) {
-      throw new Error(`无效的版本号格式: ${version}`);
-    }
-    return n;
-  });
-  return { major: major!, minor: minor!, patch: patch! };
-}
-
-function bumpVersion(current: string, type: "major" | "minor" | "patch"): string {
-  const semver = parseSemver(current);
-  switch (type) {
-    case "major":
-      return `${semver.major + 1}.0.0`;
-    case "minor":
-      return `${semver.major}.${semver.minor + 1}.0`;
-    case "patch":
-      return `${semver.major}.${semver.minor}.${semver.patch + 1}`;
-  }
-}
+import { parseSemver, bumpVersion } from "../../scripts/release";
 
 describe("parseSemver", () => {
   it("解析标准版本号 1.2.3", () => {