refactor(ambilight): [PKG-AMBILIGHT-03] split typed lifecycle and recover native canvas sampling

refactor/tasks.json

@@ -1503,11 +1503,15 @@
         "CORE-03",
         "CORE-12"
       ],
-      "status": "todo",
+      "status": "done",
       "risk": "M",
       "deliverable": "取色计算与绘帧分离，统一 RAF 和 DOM 清理",
       "acceptance": "结构变化和缺陷修复分开记录；原 API/事件/资源生命周期通过",
-      "evidence": []
+      "evidence": [
+        "changes/2026-09-12-PKG-AMBILIGHT-03-lifecycle.md",
+        "ambilight-validation.md",
+        "baselines/ambilight-lifecycle-validation.json"
+      ]
     },
     {
       "id": "PKG-AMBILIGHT-04",