fix(watch): repair SSH probe script broken by embedded quote in os_release parse

Use chr(34) inside the bash-wrapped python -c probe so monitor slots work again after hardware detail rollout.

docs/audit/2026-06-13-ssh-watch-probe-quote-fix.md

@@ -0,0 +1,28 @@
+# 审计 — SSH 监测探针引号修复
+
+**Changelog**: `docs/changelog/2026-06-13-ssh-watch-probe-quote-fix.md`
+
+## 审计范围
+
+| 文件 | 变更 | 状态 |
+|------|------|------|
+| `server/infrastructure/ssh/remote_probe.py` | `strip(chr(34))` | ☑ |
+| `tests/test_watch_metrics.py` | 探针脚本回归 | ☑ |
+
+## Step 3 规则扫描
+
+| H | 规则 | 结论 |
+|---|------|------|
+| H1 | 无新攻击面 | SAFE |
+| H2 | 恢复监测可用性 | SAFE — 热修复 |
+
+## Closure
+
+| H | 判定 | 依据 |
+|---|------|------|
+| H1–H2 | SAFE | 本地 bash 执行探针返回 status ok |
+
+## DoD
+
+- [x] `test_ssh_watch_metrics_cmd_runs_locally` passed
+- [x] changelog / audit

docs/changelog/2026-06-13-ssh-watch-probe-quote-fix.md

@@ -0,0 +1,22 @@
+# 修复 SSH 监测探针脚本语法错误
+
+**日期**：2026-06-13
+
+## 变更摘要
+
+修复 `SSH_WATCH_METRICS_CMD` 中 `.strip('"')` 破坏 bash 双引号包裹导致探针全部 `ssh_probe_failed`、实时监测不可用的问题。
+
+## 动机
+
+硬件详情上线后监测插槽无数据；根因为嵌入脚本的 `"` 提前结束 `python3 -c "..."` 字符串。
+
+## 涉及文件
+
+- `server/infrastructure/ssh/remote_probe.py` — 改用 `strip(chr(34))`
+- `tests/test_watch_metrics.py` — 本地执行探针脚本回归
+
+## 验证
+
+```bash
+.venv/bin/pytest tests/test_watch_metrics.py::test_ssh_watch_metrics_cmd_runs_locally -q
+```

server/infrastructure/ssh/remote_probe.py

@@ -99,7 +99,7 @@ try:
     try:
         for _line in open('/etc/os-release'):
             if _line.startswith('PRETTY_NAME='):
-                os_release = _line.split('=', 1)[1].strip().strip('"')[:120]
+                os_release = _line.split('=', 1)[1].strip().strip(chr(34))[:120]
                 break
     except Exception:
         pass
@@ -189,7 +189,7 @@ try:
     try:
         for _line in open('/etc/os-release'):
             if _line.startswith('PRETTY_NAME='):
-                os_release = _line.split('=', 1)[1].strip().strip('"')[:120]
+                os_release = _line.split('=', 1)[1].strip().strip(chr(34))[:120]
                 break
     except Exception:
         pass

tests/test_watch_metrics.py

@@ -202,6 +202,23 @@ def test_merge_redis_and_ssh_prefers_ssh_io():
     assert merged.net_bytes_sent == 99
 
 
+def test_ssh_watch_metrics_cmd_runs_locally():
+    import subprocess
+
+    from server.infrastructure.ssh.remote_probe import SSH_WATCH_METRICS_CMD, _parse_json_stdout
+
+    result = subprocess.run(
+        ["bash", "-c", SSH_WATCH_METRICS_CMD],
+        capture_output=True,
+        text=True,
+        timeout=20,
+    )
+    parsed = _parse_json_stdout(result.stdout)
+    assert parsed is not None
+    assert parsed.get("status") == "ok"
+    assert parsed.get("cpu_cores") is not None
+
+
 def test_normalize_watch_ttl_minutes():
     assert normalize_watch_ttl_minutes(30) == 30
     assert normalize_watch_ttl_minutes(60) == 60