test: 增加解析纯函数单元测试（node:test）

- 导出 toNum/round2/isDeepSeekModel/isDeepSeekProvider/codexWindowName 供测试
- 覆盖字符串数字兼容、双路由判断、Codex 窗口秒数映射

lib/index.js

@@ -1084,4 +1084,4 @@ function apply(ctx) {
   );
 }
 
-export { apply, inject };
+export { apply, inject, toNum, round2, isDeepSeekModel, isDeepSeekProvider, codexWindowName };

package.json

@@ -45,5 +45,8 @@
     "react": {
       "optional": true
     }
+  },
+  "scripts": {
+    "test": "node --test test/"
   }
 }

test/parse.test.mjs

@@ -0,0 +1,33 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { toNum, round2, isDeepSeekModel, isDeepSeekProvider, codexWindowName } from "../lib/index.js";
+
+test("toNum 兼容字符串与数字", () => {
+  assert.equal(toNum("69"), 69);
+  assert.equal(toNum(3.14), 3.14);
+  assert.equal(toNum("abc"), null);
+  assert.equal(toNum(null), null);
+});
+
+test("round2 保留两位小数", () => {
+  assert.equal(round2(1.234), 1.23);
+  assert.equal(round2(0.005), 0.01);
+});
+
+test("isDeepSeekModel 前缀匹配", () => {
+  assert.equal(isDeepSeekModel("deepseek-v4-flash"), true);
+  assert.equal(isDeepSeekModel("kimi-k3"), false);
+});
+
+test("isDeepSeekProvider 兼容两条官方路由", () => {
+  assert.equal(isDeepSeekProvider("deepseek"), true);
+  assert.equal(isDeepSeekProvider("deepseek-official"), true);
+  assert.equal(isDeepSeekProvider("kimi-coding"), false);
+});
+
+test("codexWindowName 窗口秒数映射", () => {
+  assert.deepEqual(codexWindowName(18000), { label: "5小时", key: "5h" });
+  assert.deepEqual(codexWindowName(604800), { label: "7天", key: "7d" });
+  assert.deepEqual(codexWindowName(2592000), { label: "30天", key: "30d" });
+  assert.deepEqual(codexWindowName(3600), { label: "1小时", key: "1h" });
+});