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-runstate-shell.md(PR#171) — merges verified via git log --merges 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-runstate-shell.md

@@ -1,6 +1,6 @@
 # feature/runstate-shell 任务卡
 
-任务主记录：<PR 链接，task-finish 时填写>；状态：进行中；owner：weichen
+任务主记录：PR #171 https://git-home.u1680832.nyat.app:30319/weichen/Agent-System-Dev/pulls/171（merge 5e2bb8aa13）；状态：已完成（回填）；owner：weichen
 
 ## 基线与授权
 
@@ -19,7 +19,7 @@
 |---|---|---|---|
 | 启动 | 64d4f115c8e61e124d7272ed68068675475e9518 | 64d4f115c8e61e124d7272ed68068675475e9518 | 2026-10-03T16:28:03Z |
 
-## 结果与验证（完成后填写）
+## 结果与验证
 
 - 结果：frontend 5961b6e，backend 7bef7a4。运行态来自 runstate.ts。SSE 流以 retry: 1000 开头。
 - 验证：`make test` 与 `make build` 通过（版本串含 frontend=5961b6e、backend=7bef7a4）。临时 mock 实例上发送「你好」后按钮变为「排队」，结束后回到「发送」，并出现 mock 回复。
@@ -27,3 +27,9 @@
 | 同步前验收 | 64d4f115c8e61e124d7272ed68068675475e9518 | f726762a8dcd73082b63341fa3d783c4d645d981 | 2026-10-03T16:41:03Z |
 | 同步前验收 | 64d4f115c8e61e124d7272ed68068675475e9518 | adc003e2a0dd363debf04bf65649f2aaa851eb80 | 2026-10-03T16:41:18Z |
 | 同步前验收 | 64d4f115c8e61e124d7272ed68068675475e9518 | 31e973081b938d5551fb2194a906fbbe3d2ab5e2 | 2026-10-03T16:41:19Z |
+
+## 闭合记录（card-autoclose 回填）
+
+- 依据：merge 5e2bb8aa13d100533433024fc94f6f49db95fe5d（PR #171）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 'Pin the shell run state across frontend and backend' (#171) from feature/runstate-shell 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。