Close 1 merged task card(s) and archive them

Why: branches merged into main had left their task cards open; backfill status and archive to prevent bookkeeping debt.
Evidence: feature-card-merge-squash-detect.md(PR#544) — merges verified via git log --merges plus Gitea API squash lookup against origin/main.
Impact: .task/*.md moved to .task/archive/ with status backfilled; no code or submodule change.
Refs: task.sh close (card-autoclose-r1)

.task/archive/feature-card-merge-squash-detect.md

@@ -1,6 +1,6 @@
 # feature/card-merge-squash-detect 任务卡
 
-任务主记录：<PR 链接，交付前填写>；状态：进行中；owner：weichen
+任务主记录：PR #544 https://git-home.u1680832.nyat.app:30319/weichen/Agent-System-Dev/pulls/544（merge 2dbe11c5d9）；状态：已完成（回填）；owner：weichen
 
 ## 基线与授权
 
@@ -371,3 +371,9 @@
   "receipt_sha256": "b948387b3e9dee2fac76d7fa1cca4c845dd695b448a4523a5a5ce1904054c96b"
 }
 ```
+
+## 闭合记录（card-autoclose 回填）
+
+- 依据：merge 2dbe11c5d970e7d6a71d0ce1a00eb399bfbbd427（PR #544）已包含于 origin/main，分支成果已落盘；本段为合入后回填。
+- 合并主题：Merge pull request 'Detect squash-merged PRs when closing task cards' (#544) from feature/card-merge-squash-detect into main
+- 归档：随闭合移入 .task/archive/；任务执行期的过程证据见原任务记录与 PR。