refactor: use psutil uptime and wmi lib for Windows temps; graceful SIGINT/SIGTERM/SIGBREAK shutdown

monitor.py

@@ -110,22 +110,16 @@ def get_memory() -> dict:
 
 def _wmi_temps() -> dict:
     """Windows: 通过 WMI 热区读取温度（部分主板支持，可能需要管理员权限）。"""
-    import subprocess
     try:
-        out = subprocess.run(
-            ["powershell", "-NoProfile", "-Command",
-             "Get-CimInstance -Namespace root/wmi -ClassName MSAcpi_ThermalZoneTemperature "
-             "| Select-Object -ExpandProperty CurrentTemperature"],
-            capture_output=True, text=True, timeout=10,
-            encoding="utf-8", errors="replace",
-        )
-        values = [float(x) for x in out.stdout.split() if x.replace(".", "", 1).isdigit()]
-    except (OSError, subprocess.SubprocessError, ValueError):
+        import wmi  # 仅 Windows 安装
+        zones = wmi.WMI(namespace="root\\wmi").MSAcpi_ThermalZoneTemperature()
+        values = [z.CurrentTemperature for z in zones]
+    except Exception:  # 类不存在 / 权限不足 / 非 Windows
         return {}
     # WMI 单位是 0.1 开尔文
     return {"ThermalZone": [
         {"label": f"zone{i}", "current": round(v / 10 - 273.15, 1)}
-        for i, v in enumerate(values)
+        for i, v in enumerate(values) if v
     ]}
 
 
@@ -249,11 +243,7 @@ def get_top_memory(n: int = 10) -> list:
 
 
 def get_uptime() -> float:
-    try:
-        with open("/proc/uptime") as f:
-            return float(f.read().split()[0])
-    except OSError:
-        return time.time() - psutil.boot_time()
+    return time.time() - psutil.boot_time()
 
 
 def get_status(top_n: int | None = None) -> dict: