refactor(core): CORE-01 migrate utility contracts to TypeScript

refactor/tasks.json

@@ -750,11 +750,14 @@
         "ENG-06",
         "PILOT-01"
       ],
-      "status": "todo",
+      "status": "done",
       "risk": "M",
       "deliverable": "utils/time/property/format/file/error/subtitle 的分批 TS 迁移",
       "acceptance": "Artplayer.utils 导出/参数/绑定保持，纯逻辑与类型测试通过",
-      "evidence": []
+      "evidence": [
+        "changes/2026-09-10-CORE-01-typed-utils.md",
+        "baselines/core-utils-validation.json"
+      ]
     },
     {
       "id": "CORE-02",
@@ -855,7 +858,7 @@
       "status": "todo",
       "risk": "H",
       "deliverable": "plugins/toggle/cue/setting/static 的旧新类型对照",
-      "acceptance": "每项有兼容重载/扩展或待决结论，不能删除旧类型样例；处理 BASE-TYPE-01/04，分别保留旧合法声明消费并验证真实返回",
+      "acceptance": "每项有兼容重载/扩展或待决结论，不能删除旧类型样例；处理 BASE-TYPE-01/04，分别保留旧合法声明消费并验证真实返回；协调 BASE-TYPE-05 的 Utils 导出、descriptor 和 timer 旧声明差异",
       "evidence": []
     },
     {