refactor(canvas): [PKG-CANVAS-03] own media and frame lifecycle in strict TypeScript

refactor/tasks.json

@@ -3291,11 +3291,15 @@
         "CORE-11",
         "CORE-16"
       ],
-      "status": "todo",
+      "status": "done",
       "risk": "H",
       "deliverable": "video adapter/原 canvas 方法/RAF 绘制/事件订阅分离",
       "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-CANVAS-03-lifecycle.md",
+        "baselines/canvas-lifecycle-validation.json",
+        "canvas-validation.md"
+      ]
     },
     {
       "id": "PKG-CANVAS-04",