fix: memOS一直启动多个实例

[IAMJOYBO]

Pre-submission checklist | 提交前检查

• I have searched existing issues and this hasn't been mentioned before | 我已搜索现有问题，确认此问题尚未被提及
• I have read the project documentation and confirmed this issue doesn't already exist | 我已阅读项目文档并确认此问题尚未存在
• This issue is specific to MemOS and not a general software issue | 该问题是针对 MemOS 的，而不是一般软件问题

Bug Description | 问题描述

🦞 OpenClaw 2026.4.9 (0512059) — iMessage green bubble energy, but for everyone.

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10:39:56+08:00 [plugins] memos-local: initialized (db: C:\Users\13268\.openclaw\memos-local\memos.db)
10:39:56+08:00 [plugins] memos-local: allowPromptInjection=true, auto-recall enabled
10:39:56+08:00 [ws] ⇄ res ✓ node.list 87ms conn=46e7af50…045c id=e493be13…e41a
10:40:58+08:00 [plugins] memos-local: service.start() not called by host, self-starting viewer...
10:40:58+08:00 [plugins] Viewer port 18799 in use, trying 18800
10:40:58+08:00 [plugins] memos-local: started (embedding: openai_compatible)
10:40:58+08:00 [plugins] ╔══════════════════════════════════════════╗
10:40:58+08:00 [plugins] ║  MemOS Memory Viewer                     ║
10:40:58+08:00 [plugins] ║  → http://127.0.0.1:18800               ║
10:40:58+08:00 [plugins] ║  Open in browser to manage memories       ║
10:40:58+08:00 [plugins] ╚══════════════════════════════════════════╝
10:40:58+08:00 [plugins] memos-local: password reset token: 6f386c68ac6af1bc578e88d82b16d4a8
10:40:58+08:00 [plugins] memos-local: forgot password? Use the reset token on the login page.
10:41:00+08:00 [ws] ⇄ res ✓ node.list 1767ms conn=46e7af50…045c id=c5df9f08…7a27
10:41:00+08:00 [plugins] [debug] Database schema initialized
10:41:00+08:00 [plugins] [debug] OpenClaw fallback model: gemma-4-26B-A4B-it-UD-IQ4_XS.gguf via http://127.0.0.1:8080/v1 (openai_compatible)
10:41:00+08:00 [plugins] [debug] OpenClaw fallback model: gemma-4-26B-A4B-it-UD-IQ4_XS.gguf via http://127.0.0.1:8080/v1 (openai_compatible)
10:41:00+08:00 [plugins] [debug] Telemetry disabled (opt-out)
10:41:00+08:00 [plugins] memos-local: installed bundled skill memos-memory-guide → C:\Users\13268\.openclaw\workspace\skills\memos-memory-guide
10:41:00+08:00 [plugins] memos-local: installed bundled skill memos-memory-guide → C:\Users\13268\.openclaw\skills\memos-memory-guide (managed)
10:41:00+08:00 [plugins] [debug] OpenClaw fallback model: gemma-4-26B-A4B-it-UD-IQ4_XS.gguf via http://127.0.0.1:8080/v1 (openai_compatible)
10:41:00+08:00 [plugins] memos-local: initialized (db: C:\Users\13268\.openclaw\memos-local\memos.db)
10:41:00+08:00 [plugins] memos-local: allowPromptInjection=true, auto-recall enabled
10:41:06+08:00 [plugins] memos-local: service.start() not called by host, self-starting viewer...
10:41:06+08:00 [plugins] Viewer port 18799 in use, trying 18800
10:41:06+08:00 [plugins] Viewer port 18800 in use, trying 18801
10:41:06+08:00 [plugins] memos-local: started (embedding: openai_compatible)
10:41:06+08:00 [plugins] ╔══════════════════════════════════════════╗
10:41:06+08:00 [plugins] ║  MemOS Memory Viewer                     ║
10:41:06+08:00 [plugins] ║  → http://127.0.0.1:18801               ║
10:41:06+08:00 [plugins] ║  Open in browser to manage memories       ║
10:41:06+08:00 [plugins] ╚══════════════════════════════════════════╝
10:41:06+08:00 [plugins] memos-local: password reset token: af8f99c4f6b474d7ea7544c22ae3b1b3
10:41:06+08:00 [plugins] memos-local: forgot password? Use the reset token on the login page.

How to Reproduce | 如何重现

1、安装memOS插件1.0.8

powershell -c "irm https://cdn.memtensor.com.cn/memos-local-openclaw/install.ps1 | iex"

2、启动OpenClaw
3、进行一次对话

Environment | 环境信息

PS C:\Users\13268\.openclaw> python --version
Python 3.12.13
PS C:\Users\13268\.openclaw> pip --version
pip 26.0.1 from C:\Users\13268\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\pip (python 3.13)
PS C:\Users\13268\.openclaw>

PS C:\Users\13268\.openclaw> pip show memoryos
WARNING: Package(s) not found: memoryos
PS C:\Users\13268\.openclaw>

Additional Context | 其他信息

No response

Willingness to Implement | 实现意愿

• I'm willing to implement this myself | 我愿意自己解决
• I would like someone else to implement this | 我希望其他人来解决

[xutao0565]

确实，尤其是openclaw gateway restart时，就得viewer没有关闭，新的viewer又启动了

[fancyboi999]

翻了一下代码，问题出在 register() 里的 serviceStarted 和 viewer 都是闭包局部变量。gateway restart 或 deferred reload 重新调 register() 的时候，旧闭包里的 viewer 没人管，新的又起一个，端口就一直往上涨。

改法是在模块层面按 stateDir 追踪活跃实例，重注册的时候先 await 把旧 viewer 关干净再启动新的。顺便把 ViewerServer.stop() 改成返回 Promise 了，不然端口还没释放就 rebind 会竞态。

PR 在 #1477，有空帮忙看看。