chore(todo): #25 方案 propose/approve + #32 fallback 登记

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013nMthbVEmQquxBRKb9Fj8u

todo/todo.json

@@ -1,9 +1,9 @@
 {
   "meta": {
     "title": "feature+windows — 项目 TODO",
-    "updated_at": "2026-06-30T14:47:39.344Z"
+    "updated_at": "2026-06-30T23:10:43.458Z"
   },
-  "seq": 17,
+  "seq": 18,
   "items": [
     {
       "id": 1,
@@ -254,6 +254,22 @@
       "done": false,
       "completed_at": null,
       "version": null
+    },
+    {
+      "id": 18,
+      "title": "看门狗后台唤醒误判节点死→假重连",
+      "desc": "app/Mac 后台或睡眠一段时间再打开,连通看门狗路径A(urltest stale)用墙上时钟算陈旧度,_lastUrltestOk 在挂起期冻住→唤醒时误判>45s→_onNodeUnhealthy 触发 disconnect+connect 假重连(智能模式还自动切节点),但隧道没掉。修:_onStats 记 _lastStatsAt,路径A 仅在 stats 仍在流但 urltest 停更时才判死;stats 整体停(挂起)则跳过。connection_provider.dart 一处。",
+      "level": "mid",
+      "tier": 3,
+      "tags": [
+        "mac",
+        "前端"
+      ],
+      "status": "done",
+      "created_at": "2026-06-30T23:00:25.193Z",
+      "done": false,
+      "completed_at": null,
+      "version": null
     }
   ]
 }