fix: toNum 对 null/空串返回 null，修正测试脚本 glob

lib/index.js

@@ -65,10 +65,21 @@ function round2(n) {
 }
 
 function toNum(v) {
+  if (v === null || v === undefined || v === "") return null;
   const n = Number(v);
   return n === n ? n : null;
 }
 
+// Codex rate_limit 窗口秒数 → 展示名（18000s=5小时、604800s=7天、2592000s=30天）
+function codexWindowName(secs) {
+  if (secs === 18000) return { label: "5小时", key: "5h" };
+  if (secs === 604800) return { label: "7天", key: "7d" };
+  if (secs === 2592000) return { label: "30天", key: "30d" };
+  const hours = Math.floor(secs / 3600);
+  if (hours >= 24) return { label: Math.floor(hours / 24) + "天", key: Math.floor(hours / 24) + "d" };
+  return { label: hours + "小时", key: hours + "h" };
+}
+
 function writeJson(res, status, body) {
   const payload = JSON.stringify(body);
   res.writeHead(status, {
@@ -932,15 +943,6 @@ function apply(ctx) {
   // rate_limit.primary/secondary_window：used_percent=已用%、limit_window_seconds=窗口秒数、
   // reset_at=重置时间戳（秒）。
 
-  function codexWindowName(secs) {
-    if (secs === 18000) return { label: "5小时", key: "5h" };
-    if (secs === 604800) return { label: "7天", key: "7d" };
-    if (secs === 2592000) return { label: "30天", key: "30d" };
-    const hours = Math.floor(secs / 3600);
-    if (hours >= 24) return { label: Math.floor(hours / 24) + "天", key: Math.floor(hours / 24) + "d" };
-    return { label: hours + "小时", key: hours + "h" };
-  }
-
   async function queryCodexUsage() {
     let key;
     try {

package.json

@@ -47,6 +47,6 @@
     }
   },
   "scripts": {
-    "test": "node --test test/"
+    "test": "node --test test/*.test.mjs"
   }
 }