fix(core): [CORE-25] read defaults without navigator

refactor/tasks.json

@@ -4493,12 +4493,13 @@
         "CORE-22",
         "ENG-12"
       ],
-      "status": "todo",
+      "status": "done",
       "risk": "M",
       "deliverable": "安全读取默认语言并保留浏览器已有默认值；实际 Node 与发布产物正反例",
       "acceptance": "记录旧发布版 ReferenceError；候选在无 navigator 时可读默认选项，浏览器语言和公开类型不回归；不以补全局对象隐藏错误",
       "evidence": [
-        "changes/2026-09-13-CI-01-node-consumers.md"
+        "changes/2026-09-13-CORE-25-defaults-ssr.md",
+        "baselines/defaults-ssr-validation.json"
       ]
     },
     {