feat: Linux 真实实现层 — 从存根库变为可用生产力工具

新增 _linux_impl.py (800+行):
- LinuxNetwork: 真实IP/接口/DNS/网关/MAC (ip命令+/proc/net)
- LinuxBluetooth: 真实蓝牙状态/扫描/配对/连接 (bluetoothctl)
- LinuxSensors: 真实温度/CPU频率/风扇 (/sys/class/hwmon)
- LinuxAudio: 真实音量控制/静音 (amixer)
- LinuxClipboard: 真实剪贴板读写 (xclip+tkinter回退)
- LinuxPower: 真实CPU/内存/电池 (psutil+/sys/class/power_supply)
- LinuxLocation: 真实IP地理定位 (ip-api.com)
- LinuxNotify: 真实桌面通知 (notify-send)
- LinuxDisplay: 真实屏幕尺寸/截屏/鼠标位置 (xdotool+X11)
- LinuxUIAutomation: 真实点击/输入/按键/滚动 (xdotool)
- LinuxCamera: 真实摄像头拍照 (opencv/V4L2)
- LinuxProcess: 真实进程列表/系统信息/应用管理 (psutil+/proc)
- LinuxShell: 真实命令执行 (subprocess)

改造10+核心类使用Linux真实实现:
- BluetoothAdapter/SensorManager/AudioManager
- ConnectivityManager/WifiManager/TelephonyManager
- LocationManager/PowerManager/BatteryManager/Build
- ActivityManager/Activity/Toast/Display/ClipboardManager
- NotificationManager

15项真实行为测试全部通过:
- 真实IP: 10.60.218.244
- 真实位置: 北京 39.9042, 116.407
- 真实主机名: work-41-vci-g427c
- 真实内核: 5.15.120.byteatom-ck.14
- 真实内存: 1.8GB/3.8GB
- 真实进程列表

android_pyapi/android/net_wifi.py

@@ -16,6 +16,13 @@ from .._core import (
     _sdcard_root, _app_data_dir, _package_name,
 )
 
+# Linux 真实实现导入
+try:
+    from .._linux_impl import IS_LINUX, LinuxNetwork, HAS_IP
+    _USE_LINUX = IS_LINUX
+except ImportError:
+    _USE_LINUX = False
+
 
 # ═══════════════════════════════════════════════════════════════
 # SupplicantState
@@ -620,6 +627,8 @@ class WifiManager(Stub):
         self._p2p_channels: List[int] = []
 
     def getConnectionInfo(self) -> Optional[WifiInfo]:
+        if _USE_LINUX:
+            return self._get_linux_connection_info()
         if self._connection_info is None:
             info = WifiInfo()
             info._ssid = '"mock_wifi"'
@@ -632,6 +641,34 @@ class WifiManager(Stub):
             self._connection_info = info
         return self._connection_info
 
+    def getWifiInfo(self) -> Optional[WifiInfo]:
+        """getWifiInfo — getConnectionInfo 的别名"""
+        return self.getConnectionInfo()
+
+    def _get_linux_connection_info(self) -> WifiInfo:
+        """从 LinuxNetwork.get_wifi_info() 构造 WifiInfo"""
+        info = WifiInfo()
+        try:
+            data = LinuxNetwork.get_wifi_info() or {}
+            ssid = data.get("ssid", "")
+            info._ssid = f'"{ssid}"' if ssid else "<unknown ssid>"
+            info._bssid = data.get("bssid", "00:00:00:00:00:00")
+            # signal 通常是 0-100, 转换为 RSSI (dBm, 约 -100..0)
+            signal = data.get("signal", 0)
+            if isinstance(signal, (int, float)) and signal > 0:
+                info._rssi = int(-100 + (signal / 100.0) * 60)
+            else:
+                info._rssi = int(signal) if signal else WifiInfo.INVALID_RSSI
+            iface = data.get("interface", "")
+            if iface:
+                info._frequency = 2412  # 默认 2.4GHz
+            info._link_speed = data.get("link_speed", 0) or 0
+            info._network_id = 0
+            info._supplicant_state = SupplicantState(SupplicantState.COMPLETED)
+        except Exception:
+            pass
+        return info
+
     def getScanResults(self) -> List[ScanResult]:
         return list(self._scan_results)
 
@@ -644,8 +681,26 @@ class WifiManager(Stub):
         return True
 
     def isWifiEnabled(self) -> bool:
+        if _USE_LINUX:
+            return self._linux_has_wireless_interface()
         return self._wifi_enabled
 
+    def _linux_has_wireless_interface(self) -> bool:
+        """检查是否存在无线网络接口"""
+        try:
+            for iface in LinuxNetwork.get_interfaces():
+                name = iface.get("ifname") or iface.get("name", "")
+                if name and name.startswith(("wl", "wlan", "wlp")):
+                    return True
+            # 回退: 检查 /sys/class/net 下的无线接口
+            import os as _os
+            for name in _os.listdir("/sys/class/net/") if _os.path.isdir("/sys/class/net") else []:
+                if name.startswith(("wl", "wlan", "wlp")):
+                    return True
+        except Exception:
+            pass
+        return False
+
     def getWifiState(self) -> int:
         return self._wifi_state